Objective:The aims of this study were to investigate the clinical applicability of 3D segmentation in measuring cochlear anatomical parameters,explore factors that influence the insertion angle of cochlear implant ele...Objective:The aims of this study were to investigate the clinical applicability of 3D segmentation in measuring cochlear anatomical parameters,explore factors that influence the insertion angle of cochlear implant electrodes in patients with inner ear malformations,and determine the value of 3D segmentation in predicting cochlear implant electrode insertion depth by simulating electrode implantation in a reconstructed 3D model.Methods:Data from 208 temporal bone CT scans of patients with a variety of inner ear malformations(including the CH,IP-Ⅰ,IP-Ⅱ,and IP-Ⅲtypes)who underwent cochlear implantation at our center were retrospectively analyzed.Preoperative temporal bone CT data were subjected to three-dimensional(3D)segmentation of the cochlea with a 3D slicer.Results:Cochlear malformation types,including IP typesⅠ(42 ears),Ⅱ(278ears),Ⅲ(20 ears),and CH(65 ears),were diagnosed and measured in 208 preoperative CT datasets.Cochlear anatomical parameters and electrode length were correlated,which partially explained the variations in electrode insertion angle.The mean angle of implantation among the enrolled patients was 564.33°,and the mean implantation angle prediction error in the 3D segmentation was|23.74|°.Conclusion:Three-dimensional segmentation from temporal bone CT is valuable for surgeons,especially in treating patients with inner ear malformation.Such insights will help surgeons understand overall anatomical variations,predict electrode implantation depth,and complete preoperative imaging assessments for cochlear implant insertion depth in patients with inner ear malformations.展开更多
The teaching model of "creative Teaching + creative class = creative products + additional value" was proposed, so as to cultivate students' design creativity and practical ability by changing teaching c...The teaching model of "creative Teaching + creative class = creative products + additional value" was proposed, so as to cultivate students' design creativity and practical ability by changing teaching concepts and curriculum of Three-dimension Structure, and using new materials for spatial creativity training. This paper acclaims that only if the traditional teaching concepts of Three-dimension Structrue are abandoned, students' specialty fully used, the teaching effect will be improved effectively.展开更多
Objective: To evaluate three-dimensional bronchial artery imaging charactersin central lung cancer and applied values with multi-slice spiral CT (MSCT) to provide theoreticalevidence on blood supply and intervention t...Objective: To evaluate three-dimensional bronchial artery imaging charactersin central lung cancer and applied values with multi-slice spiral CT (MSCT) to provide theoreticalevidence on blood supply and intervention therapy. Methods: Eighteen patients with central lungcancer underwent MSCT with real time helical thin-slice CT scanning. Three-dimensional bronchialartery reconstruction was done at the console work-station. The space anatomical characters ofbronchial artery were observed through different rotations. Results: For 6 cases, thethree-dimensional images of bronchial artery (33.33%) could exactly show the origins, the routes(lung inner segment and mediatism segment) and the diameters of bronchial arteries. Vision rate ofbronchial arteries was the highest in pulmonary artery stricture and truncation groups, and thevessels' diameter became larger apparently. These characters demonstrated blood supply of this kindof central lung cancer come from bronchial artery. Volume rendering images were the best ones amongthree-dimensional images. Conclusion: Three-dimensional imaging with MSCT in bronchial artery canreveal the anatomical characters of bronchial artery and provide theoretical evidence on bloodsupply and intervention therapy of central lung cancer.展开更多
Objective To evaluate the clinical value of three dimensional computerized tomography angiography in the diagnosis and treatment of spontaneous subarachnoid hemorrhage. Methods 616 cases were diagnosed as suspected in...Objective To evaluate the clinical value of three dimensional computerized tomography angiography in the diagnosis and treatment of spontaneous subarachnoid hemorrhage. Methods 616 cases were diagnosed as suspected intracranial aneurysms in 3D CTA system. Computed tomographic scans and CTA studies were展开更多
Introduction: In the setting of an extra-adrenal malignancy, it is a recognized clinical challenge to try and distinguish a benign adrenal mass from a metastatic deposit. Current non-invasive diagnostic tools for adre...Introduction: In the setting of an extra-adrenal malignancy, it is a recognized clinical challenge to try and distinguish a benign adrenal mass from a metastatic deposit. Current non-invasive diagnostic tools for adrenal gland evaluation include CT, MRI, PET and PET-CT. Diagnostic interpretative error can occur as evaluations rarely have complete cytologic or histologic correlation for concordance purposes. Aims: To establish the performance characteristics of non-contrast CT attenuation values (Hounsfield units-HU) and the optimal PET-CT maximum standard uptake value (SUVmax) for predicting adrenal malignancy when correlated with adrenal gland endoscopic ultrasound fine needle aspiration (EUS FNA) cytology results. Methods: A prospectively maintained EUS database was reviewed to identify consecutive patients who underwent a left adrenal gland FNA. Non-contrast CT attenuation values and SUVmax scores were calculated. EUS FNA cytology results were used as the reference standard for determining the presence of benign versus malignant adrenal gland status. Results: Sixty-two patients (69 ± 11 years) underwent adrenal EUS FNA, 34 (54.8%) of whom had a clinically suspected or established extra-adrenal malignancy. Non-invasive imaging was suggestive of abnormal adrenal morphology or altered PET-CT FDG activity in 45 (72.6%) patients. Elevated attenuation values (≥10 HU) by non-enhanced CT had a sensitivity and specificity of 100% and 34.6%, respectively. The SUVmax for malignant altered morphology was significantly higher than that for benign lesions [(8.5 ± 3.1 vs 3.3 ± 0.7;(p = 0.0001)]. ROC curve analysis indicated that an optimum cutoff SUVmax of ≥4.1 (AUC 0.92) yielded the best power distinction for malignancy with a sensitivity and specificity of 89% and 100%. Conclusion: When evaluating altered adrenal morphology by non-invasive methods, the performance characteristics of elevated CT attenuation values are suboptimal. But by adopting a SUVmax cut-off value of ≥4.1 could potentially improve such characteristics to detect malignancy.展开更多
BACKGROUND： The accurate measurements of various data of the bone diameters of foramen ovale of living person can change the methods of puncturing trigeminal gasserian ganglion via foramen ovale for treating trifacia...BACKGROUND： The accurate measurements of various data of the bone diameters of foramen ovale of living person can change the methods of puncturing trigeminal gasserian ganglion via foramen ovale for treating trifacial neuralgia from the experience of puncture operator only to puncture by taking the objective data of measurement as the evidence, which is good for improving the accuracy of puncturing trigeminal ganglion and reducing side effects. OBJECTIVE ： To observe the forms of foramen ovales in healthy adults displayed by volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan of skull base, and measure the longitudinal diameter and transverse diameter. DESIGN ： A repetitive observation and measurement SETTINGS ： Department of Neurosurgery and Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine. PARTICIPANTS： Fifty healthy adults （100 sides）, who were examined with three-dimensional spiral CT scan, were randomly selected from the Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine from January 2005 to January 2006, including 26 males and 24 females, aged 25-68 years with an average of 48 years old. They were all informed and agreed with the examination. METHODS ： The subjects were examined with the Philips 16-slice spiral CT-Mx 8000 IDT CT apparatus （Philips Company, Holland）, the scanning ranged from 2 cm below the canthomeatal line to the level of suprasellar cistem. The width of collimator was 0.75 mm, pitch was 0.663; tube current was 350 mA, voltage was 120 kV, resolution was 512×512 matrix; slice thickness of reconstruction was 1 mm, and interval was 0.5 mm. After the three-dimensional spiral CT thin-slice scan of skull base, the image post-processing techniques including volume rendering and multi-planar reconstruction were applied to observe the forms of foramen ovales, and measure the size, longitudinal diameter and transverse diameter of the foramen ovales. The figures of the foramen ovales were drawn with mouse along the boundary of bone porous margin and soft tissue. According to the indications, the diameters were measured with computer to observe the forms of foramen ovales. MAIN OUTCOME MEASURES ： The longitudinal diameter, transverse diameter and form of foramen ovales were observed. RESULTS： All the 50 healthy adults （100 sides） were involved in the analysis of results. （1） It was observed in the volume rendering images that foramen ovales had four forms of oval shape （77 sides）, kidney shape （12 sides）, round shape （7 sides）, ribbon shape （4 sides）. （2） The longitudinal diameters of left and right foramen ovales were （7.67±1.32） and （7.98±1.45） mm, and the transverse diameters were （4.04±0.83）, （4.09±1.07） mm; There was no obvious difference between left and right longitudinal diameters （t = 1.63, P = 0.11 ）, and left and right transverse diameters were close （t = 0.45, P= 0.65）. CONCLUSION ： The non-invasive techniques of volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan can clearly display the formand size of foramen ovale in healthy adults.展开更多
Objective:This study focused on the clinical application value of dynamic CT perfusion imaging in stroke.Methods:A total of 92 patients with stroke were enrolled in this study.All patients were selected from December ...Objective:This study focused on the clinical application value of dynamic CT perfusion imaging in stroke.Methods:A total of 92 patients with stroke were enrolled in this study.All patients were selected from December 2017 to December 2018 according to different diagnostic methods.They were randomly divided into two groups:the observation group and control group.The number of patients in each group was 46.The observation group mainly used dynamic CT perfusion imaging for diagnosis while the control group mainly used CT plain scan.The diagnostic effects of the two groups of patients and the hemodynamic parameters of the surrounding area of sub-acute hematoma and the acute phase of stroke in the observation group were compared.Results:The clinical diagnosis of the observation group was 95.65%while the clinical diagnosis of the control group was 69.57%.The observation group was higher than that of the control group and the difference was significant.In addition,the hemodynamic parameters of the acute phase of the observation group and the sub-acute hematoma were also varied.Conclusion:Dynamic CT perfusion imaging has significant clinical value in stroke,and it is worthy of further application.展开更多
Objective:To compare and analyze the clinical diagnostic value of multi-slice spiral CT and enhanced MRI for primary liver cancer(PLC),and to summarize the imaging findings.Methods:The research subjects in this articl...Objective:To compare and analyze the clinical diagnostic value of multi-slice spiral CT and enhanced MRI for primary liver cancer(PLC),and to summarize the imaging findings.Methods:The research subjects in this article were 50 patients with PLC who were admitted to our hospital from 2017 April to 2018 September.After the patients were admitted,they were examined by multi-slice spiral CT and enhanced MRI scanning,and the pathological diagnosis results were followed up.Relevant information was reviewed and analyzed.Results:The detection rate of multi-slice spiral CT was higher than that of MRI in the portal venous phase lesion detection.The difference was statistically significant(P<0.05).The detection rate of lesions in the arterial phase and delayed phase was not statistically significant(P>0.05);the diagnostic accuracy of multi-slice spiral CT was 85.96%,and the diagnostic accuracy of enhanced MRI scanning was 91.11%,which was not statistically significant(P>0.05).MRI scans showed the capsules of primary liver cancer better than CT,but the difference was not statistically significant(P>0.05).Conclusion:In conclusion,both multi-slice spiral CT and enhanced MRI can be used for the effective diagnosis of primary liver cancer intrahepatic lesions.The diagnostic value of the two is equivalent,but enhanced MRI has a slightly higher diagnostic accuracy and can be used as the preferred method.展开更多
Background: As the population age structure gradually ages, more and more elderly people were found to have pulmonary nodules during physical examinations. Most elderly people had underlying diseases such as heart, lu...Background: As the population age structure gradually ages, more and more elderly people were found to have pulmonary nodules during physical examinations. Most elderly people had underlying diseases such as heart, lung, brain and blood vessels and cannot tolerate surgery. Computed tomography (CT)-guided percutaneous core needle biopsy (CNB) was the first choice for pathological diagnosis and subsequent targeted drugs, immune drugs or ablation treatment. CT-guided percutaneous CNB requires clinicians with rich CNB experience to ensure high CNB accuracy, but it was easy to cause complications such as pneumothorax and hemorrhage. Three-dimensional (3D) printing coplanar template (PCT) combined with CT-guided percutaneous pulmonary CNB biopsy has been used in clinical practice, but there was no prospective, randomized controlled study. Methods: Elderly patients with lung nodules admitted to the Department of Oncology of our hospital from January 2019 to January 2023 were selected. A total of 225 elderly patients were screened, and 30 patients were included after screening. They were randomly divided into experimental group (Group A: 30 cases) and control group (Group B: 30 cases). Group A was given 3D-PCT combined with CT-guided percutaneous pulmonary CNB biopsy, Group B underwent CT-guided percutaneous pulmonary CNB. The primary outcome measure of this study was the accuracy of diagnostic CNB, and the secondary outcome measures were CNB time, number of CNB needles, number of pathological tissues and complications. Results: The diagnostic accuracy of group A and group B was 96.67% and 76.67%, respectively (P = 0.026). There were statistical differences between group A and group B in average CNB time (P = 0.001), number of CNB (1 vs more than 1, P = 0.029), and pathological tissue obtained by CNB (3 vs 1, P = 0.040). There was no statistical difference in the incidence of pneumothorax and hemorrhage between the two groups (P > 0.05). Conclusions: 3D-PCT combined with CT-guided percutaneous CNB can improve the puncture accuracy of elderly patients, shorten the puncture time, reduce the number of punctures, and increase the amount of puncture pathological tissue, without increasing pneumothorax and hemorrhage complications. We look forward to verifying this in a phase III randomized controlled clinical study. .展开更多
Objective: to explore and analyze the clinical value of CT and MRI in the diagnosis of spinal tuberculosis. Methods: a total of 48 patients with spinal tuberculosis admitted to our hospital from January to December 20...Objective: to explore and analyze the clinical value of CT and MRI in the diagnosis of spinal tuberculosis. Methods: a total of 48 patients with spinal tuberculosis admitted to our hospital from January to December 2020 were selected for the study. All patients received CT and MRI imaging diagnosis successively, and the results of the two imaging examinations were compared and analyzed. Results: the diagnosis results of the two methods for bone disc loss and paravertebral mass are exactly the same, P > 0.05. The detection rate of ligament diffusion, dural cyst and meningeal enhancement by MRI was significantly higher than that by CT, while the detection rate of calcification was significantly lower than that by CT, P<0.05. Conclusion: in the clinical diagnosis of spinal tuberculosis, both CT and MIR have high application value and the diagnostic accuracy of MIR is relatively higher.展开更多
Objective: to improve the diagnostic effect of acute pancreatitis, CT examination was adopted this time. Methods: a total of 100 patients with acute pancreatitis in our hospital were selected from July 2020 to July 20...Objective: to improve the diagnostic effect of acute pancreatitis, CT examination was adopted this time. Methods: a total of 100 patients with acute pancreatitis in our hospital were selected from July 2020 to July 2021. Results: CT images showed hemorrhage and necrosis type of 30%, edema type of 67%, detection rate of 97%, missed diagnosis rate of 3%, CT images showed high detection rate, and there was no significant difference with pathological examination results (p > 0.05). In 30 cases of hemorrhagic necrotic type, grade A was 8%, grade B was 10%, grade C was 6%, grade D was 4%, grade E was 2%, in 67 cases of simple edematous type, grade A was 21%, grade B was 17%, grade C was 13%, grade D was 10%, grade E was 6%. It can be seen that the proportion of B grade is relatively high in hemorrhagic necrosis type, and the proportion of A grade is relatively high in simple edema type. CT imaging can clearly show the grading of pancreas. Conclusion: CT examination of acute pancreatitis is effective and of good value.展开更多
Objective: to analyze the diagnostic value of thyroid CT plain scan + enhanced scan in patients with this study disease. Methods: the clinical data of 194 patients with study diseases from March 2019 to March 2020 wer...Objective: to analyze the diagnostic value of thyroid CT plain scan + enhanced scan in patients with this study disease. Methods: the clinical data of 194 patients with study diseases from March 2019 to March 2020 were analyzed retrospectively, of which 122 patients were benign, a total of 158;There were 36 patients with malignant tumors, a total of 44. They were divided into regular type (SCC) and irregular type (non SCC) according to calcification. The degree and distribution of calcification were analyzed. At the same time, the satisfaction of patients with examination services was counted. Results: among 122 benign patients, there were 46 patients with regular calcification and 76 patients with irregular calcification. Among the 36 malignant patients, 4 cases were regular and 32 cases were irregular. There were significant differences between regular and irregular types in benign and malignant nodules (P < 0.05);The distribution of benign and malignant nodules in irregular type is quite different from that around calcification after CT scanning, which is comparable (P < 0.05). After 194 patients received the examination, 98 patients were very satisfied with the examination service, 94 patients were relatively satisfied with the examination service, and 2 patients were dissatisfied with the examination service. The satisfaction with the examination service was 98.97%. Conclusion: plain and enhanced CT has certain differential diagnostic significance in the diagnosis of coarse calcification of thyroid nodules, and delayed enhanced CT has higher diagnostic value.展开更多
The anatomic relationship of oral and maxillofacial region is very com-plex,due to the large number of sinuses,cavities and spaces,and also closely related to the brain.The diagnosis of oral and maxillofacial lesions ...The anatomic relationship of oral and maxillofacial region is very com-plex,due to the large number of sinuses,cavities and spaces,and also closely related to the brain.The diagnosis of oral and maxillofacial lesions usually depends on the imaging examination.The conventional imaging methods are common CT and X-ray plain films.In recent years,with the rapid development of medical science and technology,more intuitive and vivid three-dimensional images have been applied in the diagnosis and treatment of oral and maxillofacial diseases.Therefore,CT three-dimensional imaging technology has been widely used in clinical practice.This paper reviews this topic.展开更多
Objective: To deeply analyze and study the clinical value and significance of 64-slice spiral CT in the imaging diagnosis and treatment of pulmonary sarcoidosis. Methods: In this study, the clinical data of 80 patient...Objective: To deeply analyze and study the clinical value and significance of 64-slice spiral CT in the imaging diagnosis and treatment of pulmonary sarcoidosis. Methods: In this study, the clinical data of 80 patients with pulmonary sarcoidosis admitted to our hospital from January 2019 to January 2020 were selected as the research objects, and all 80 patients were confirmed as pulmonary sarcoidosis by biopsy through retrospective analysis. After that, 64-slice spiral CT examination was performed to compare the results with biopsy results to judge the accuracy of diagnosis, and finally to distinguish the characteristics and clinical manifestations of pulmonary sarcoidosis through imaging data. Results: the biopsy results as the main standard of diagnosis, then by using 64 layer spiral CT examination, the matching degree of up to 100%, no missed diagnosis and misdiagnosis, the 80 patients were characterized by swollen lymph nodes, after using 64 layer spiral CT inspection, found that existence of small amount of pleural effusion 8 patients;There were 45 cases with intrapulmonary changes, including 20 cases with intrapulmonary scattered and subpleural multiple nodules, and the occurrence probability of intrapulmonary changes was 56.3%. Conclusion: 64-slice spiral CT in the diagnosis of pulmonary sarcoidosis, its accuracy is relatively higher, and the operation is more convenient, often can provide more effective reference in the clinical diagnosis and symptomatic treatment process, but also has more extensive clinical promotion significance and value.展开更多
Objective To discuss the measurement of bone tumor volume on the basis of three dimensional images segmentation technology. Methods Twenty patients with lacunar bone tumor from Tianjin Hospital and Tongji Hospital wer...Objective To discuss the measurement of bone tumor volume on the basis of three dimensional images segmentation technology. Methods Twenty patients with lacunar bone tumor from Tianjin Hospital and Tongji Hospital were included in the展开更多
Objective: to consider the difference and characteristics of clinical diagnosis and treatment of mycoplasma pneumoniae pneumonia in children by X-ray and CT. Methods a total of 120 children with mycoplasma pneumoniae ...Objective: to consider the difference and characteristics of clinical diagnosis and treatment of mycoplasma pneumoniae pneumonia in children by X-ray and CT. Methods a total of 120 children with mycoplasma pneumoniae pneumonia received from the department of Pediatrics of our hospital during 2020/8-2020/8 were randomly divided into 2 groups. Among them, X-ray examination technique was selected in the observation group and CT examination technique was selected in the control group, with 60 cases in each group. The clinical diagnosis results of the two groups were compared. Results: There were abnormal changes in the lungs of all the children in the observation group. Finally, it was found that there was local shadow of lung parenchyma, patchy, and a little pleural effusion. The chest manifestations of the control group were different, and the typical manifestations were significantly enlarged hilar shadow and increased lung striae. In addition, the clinical diagnosis rate of the observation group was 96.67%, which was significantly higher than that of the control group (51.67%), indicating a significant difference in the above indicators (P < 0.05). Results: The clinical manifestations of mycoplasma pneumoniae pneumonia in children are not single, and they are diversified. Good diagnostic results can be obtained by using CT and X-ray technology for examination. However, the clinical diagnosis rate of CT technology is relatively high, so to ensure the accuracy and efficiency of clinical diagnosis results, It is usually necessary to carry out comprehensive evaluation based on clinical manifestations, changes in physical signs, laboratory examination structure, X-ray and CT examination, so as to bring support and guidance for timely and standardized treatment of children as soon as possible.展开更多
To analyze the value of multi-slice spiral CT in diagnosing the severity of type 2 diabetic foot. Methods: A total of 98 patients with type 2 diabetes treated in our hospital from January 2020 to July 2021 were random...To analyze the value of multi-slice spiral CT in diagnosing the severity of type 2 diabetic foot. Methods: A total of 98 patients with type 2 diabetes treated in our hospital from January 2020 to July 2021 were randomly selected for this study. Pathological diagnosis of all patients showed that 28 patients with diabetic foot (Wagner grade 0-2 in 18 cases and grade 3-4 in 10 cases) were diagnosed by multi-slice spiral CT. The clinical data of patients with type 2 diabetes mellitus and patients with type 2 diabetic foot were measured. The cross-sectional area of lower extremity artery diameter of the two groups and the cross-sectional area of lower extremity artery diameter of patients with different degrees of diabetic foot were recorded, and the results were statistically compared. Results: Blood, TC and hs-CRP were higher on the second day after meal (P < 0.05), but there was no significant difference in other data (P > 0.05). Compared with patients with type 2 diabetes alone, the cross-sectional areas of spinal artery, adrenal artery and anterior tibial artery in patients with type 2 diabetes mellitus and diabetic foot were not significantly different (P > 0.05), but the cross-sectional areas of posterior tibial artery, tibial artery and femoral artery were smaller (P < 0.05). Compared with Wagner grade 0-2, the cross-sectional area of spinal artery in patients with grade 3-4 was higher than that of Wagner grade 0-2 (P > 0.05), but the cross-sectional area of posterior tibial artery, tibial artery and femoral artery was smaller (P < 0.05). Conclusion: In clinical diagnosis of the severity of type 2 diabetic foot patients, the application of multi-slice spiral CT can provide reliable guidance for clinical diagnosis, and has high promotion value.展开更多
Objective: To analyze and study the diagnostic value of multi-slice spiral CT and magnetic resonance imaging in patients with occult fractures. Methods: Forty patients from our hospital with occult fractures were sele...Objective: To analyze and study the diagnostic value of multi-slice spiral CT and magnetic resonance imaging in patients with occult fractures. Methods: Forty patients from our hospital with occult fractures were selected as the observation group for MRI diagnosis, and 40 patients as the control group for ct diagnosis. The positive detection rates of patients in the two groups were compared. Results The diagnostic effect of MRI technique was superior to that of CT technique (P < 0.05), and the positive detection rate of patients in the control group was lower than that of patients in the observation group. Conclusion The value of MRI three-dimensional reconstruction in patients with occult fractures is higher than that of multi-slice spiral CT technology, the fracture data of patients detected are more accurate, and the effect of its application value is more significant in the case of occult complex fractures, which is worthy of promotion in all hospitals.展开更多
Objective: to study the clinical value of CT examination in patients with gastrointestinal perforation and abdominal infection. Methods: 200 patients with gastrointestinal perforation and abdominal infection who were ...Objective: to study the clinical value of CT examination in patients with gastrointestinal perforation and abdominal infection. Methods: 200 patients with gastrointestinal perforation and abdominal infection who were treated in our hospital from February 2016 to August 2019 were selected as the research objects. All patients underwent CT scanning. The results of doctors' reading were recorded and analyzed. The locations of gastrointestinal perforation were summarized and the CT manifestations were analyzed. Results: among the 200 patients, 164 had perforation of upper digestive tract and 36 had perforation of lower digestive tract. There were 91 cases (45.50%) of duodenal perforation, 73 cases (36.50%) of gastric perforation, 28 cases (14.00%) of appendiceal perforation and 8 cases (4.00%) of other intestinal perforation. The main sign of diagnosing digestive tract perforation is abdominal cavity gas accumulation, in which 52.00% of the patients show large amount of gas accumulation and 39.00% of the patients show small amount of gas accumulation;CT signs of abdominal infection include ascites and effusion, and signs of enlarged lymph nodes, abdominal abscess and peritoneal thickening also support abdominal infection. Conclusion: CT examination of patients with gastrointestinal perforation and abdominal cavity infection has high diagnostic value. Abdominal cavity gas accumulation and effusion are the main signs of CT diagnosis.展开更多
基金supported by the National Key Research and Development Program of China(grant no.2022YFC2402705)National Municipal Natural Science Foundation(grant no.82471161)Beijing Municipal Natural Science Foundation(grant no.7244308)。
文摘Objective:The aims of this study were to investigate the clinical applicability of 3D segmentation in measuring cochlear anatomical parameters,explore factors that influence the insertion angle of cochlear implant electrodes in patients with inner ear malformations,and determine the value of 3D segmentation in predicting cochlear implant electrode insertion depth by simulating electrode implantation in a reconstructed 3D model.Methods:Data from 208 temporal bone CT scans of patients with a variety of inner ear malformations(including the CH,IP-Ⅰ,IP-Ⅱ,and IP-Ⅲtypes)who underwent cochlear implantation at our center were retrospectively analyzed.Preoperative temporal bone CT data were subjected to three-dimensional(3D)segmentation of the cochlea with a 3D slicer.Results:Cochlear malformation types,including IP typesⅠ(42 ears),Ⅱ(278ears),Ⅲ(20 ears),and CH(65 ears),were diagnosed and measured in 208 preoperative CT datasets.Cochlear anatomical parameters and electrode length were correlated,which partially explained the variations in electrode insertion angle.The mean angle of implantation among the enrolled patients was 564.33°,and the mean implantation angle prediction error in the 3D segmentation was|23.74|°.Conclusion:Three-dimensional segmentation from temporal bone CT is valuable for surgeons,especially in treating patients with inner ear malformation.Such insights will help surgeons understand overall anatomical variations,predict electrode implantation depth,and complete preoperative imaging assessments for cochlear implant insertion depth in patients with inner ear malformations.
基金Sponsored by the First Session of Middle-aged and Young Key Teachers’and Presidents’Overseas Research Program of Jiangsu Colleges and Universities
文摘The teaching model of "creative Teaching + creative class = creative products + additional value" was proposed, so as to cultivate students' design creativity and practical ability by changing teaching concepts and curriculum of Three-dimension Structure, and using new materials for spatial creativity training. This paper acclaims that only if the traditional teaching concepts of Three-dimension Structrue are abandoned, students' specialty fully used, the teaching effect will be improved effectively.
文摘Objective: To evaluate three-dimensional bronchial artery imaging charactersin central lung cancer and applied values with multi-slice spiral CT (MSCT) to provide theoreticalevidence on blood supply and intervention therapy. Methods: Eighteen patients with central lungcancer underwent MSCT with real time helical thin-slice CT scanning. Three-dimensional bronchialartery reconstruction was done at the console work-station. The space anatomical characters ofbronchial artery were observed through different rotations. Results: For 6 cases, thethree-dimensional images of bronchial artery (33.33%) could exactly show the origins, the routes(lung inner segment and mediatism segment) and the diameters of bronchial arteries. Vision rate ofbronchial arteries was the highest in pulmonary artery stricture and truncation groups, and thevessels' diameter became larger apparently. These characters demonstrated blood supply of this kindof central lung cancer come from bronchial artery. Volume rendering images were the best ones amongthree-dimensional images. Conclusion: Three-dimensional imaging with MSCT in bronchial artery canreveal the anatomical characters of bronchial artery and provide theoretical evidence on bloodsupply and intervention therapy of central lung cancer.
文摘Objective To evaluate the clinical value of three dimensional computerized tomography angiography in the diagnosis and treatment of spontaneous subarachnoid hemorrhage. Methods 616 cases were diagnosed as suspected intracranial aneurysms in 3D CTA system. Computed tomographic scans and CTA studies were
文摘Introduction: In the setting of an extra-adrenal malignancy, it is a recognized clinical challenge to try and distinguish a benign adrenal mass from a metastatic deposit. Current non-invasive diagnostic tools for adrenal gland evaluation include CT, MRI, PET and PET-CT. Diagnostic interpretative error can occur as evaluations rarely have complete cytologic or histologic correlation for concordance purposes. Aims: To establish the performance characteristics of non-contrast CT attenuation values (Hounsfield units-HU) and the optimal PET-CT maximum standard uptake value (SUVmax) for predicting adrenal malignancy when correlated with adrenal gland endoscopic ultrasound fine needle aspiration (EUS FNA) cytology results. Methods: A prospectively maintained EUS database was reviewed to identify consecutive patients who underwent a left adrenal gland FNA. Non-contrast CT attenuation values and SUVmax scores were calculated. EUS FNA cytology results were used as the reference standard for determining the presence of benign versus malignant adrenal gland status. Results: Sixty-two patients (69 ± 11 years) underwent adrenal EUS FNA, 34 (54.8%) of whom had a clinically suspected or established extra-adrenal malignancy. Non-invasive imaging was suggestive of abnormal adrenal morphology or altered PET-CT FDG activity in 45 (72.6%) patients. Elevated attenuation values (≥10 HU) by non-enhanced CT had a sensitivity and specificity of 100% and 34.6%, respectively. The SUVmax for malignant altered morphology was significantly higher than that for benign lesions [(8.5 ± 3.1 vs 3.3 ± 0.7;(p = 0.0001)]. ROC curve analysis indicated that an optimum cutoff SUVmax of ≥4.1 (AUC 0.92) yielded the best power distinction for malignancy with a sensitivity and specificity of 89% and 100%. Conclusion: When evaluating altered adrenal morphology by non-invasive methods, the performance characteristics of elevated CT attenuation values are suboptimal. But by adopting a SUVmax cut-off value of ≥4.1 could potentially improve such characteristics to detect malignancy.
基金a grant fromTackle Key Problems in Sci-ence and Technology of FoshanCity, No. 200505075
文摘BACKGROUND： The accurate measurements of various data of the bone diameters of foramen ovale of living person can change the methods of puncturing trigeminal gasserian ganglion via foramen ovale for treating trifacial neuralgia from the experience of puncture operator only to puncture by taking the objective data of measurement as the evidence, which is good for improving the accuracy of puncturing trigeminal ganglion and reducing side effects. OBJECTIVE ： To observe the forms of foramen ovales in healthy adults displayed by volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan of skull base, and measure the longitudinal diameter and transverse diameter. DESIGN ： A repetitive observation and measurement SETTINGS ： Department of Neurosurgery and Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine. PARTICIPANTS： Fifty healthy adults （100 sides）, who were examined with three-dimensional spiral CT scan, were randomly selected from the Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine from January 2005 to January 2006, including 26 males and 24 females, aged 25-68 years with an average of 48 years old. They were all informed and agreed with the examination. METHODS ： The subjects were examined with the Philips 16-slice spiral CT-Mx 8000 IDT CT apparatus （Philips Company, Holland）, the scanning ranged from 2 cm below the canthomeatal line to the level of suprasellar cistem. The width of collimator was 0.75 mm, pitch was 0.663; tube current was 350 mA, voltage was 120 kV, resolution was 512×512 matrix; slice thickness of reconstruction was 1 mm, and interval was 0.5 mm. After the three-dimensional spiral CT thin-slice scan of skull base, the image post-processing techniques including volume rendering and multi-planar reconstruction were applied to observe the forms of foramen ovales, and measure the size, longitudinal diameter and transverse diameter of the foramen ovales. The figures of the foramen ovales were drawn with mouse along the boundary of bone porous margin and soft tissue. According to the indications, the diameters were measured with computer to observe the forms of foramen ovales. MAIN OUTCOME MEASURES ： The longitudinal diameter, transverse diameter and form of foramen ovales were observed. RESULTS： All the 50 healthy adults （100 sides） were involved in the analysis of results. （1） It was observed in the volume rendering images that foramen ovales had four forms of oval shape （77 sides）, kidney shape （12 sides）, round shape （7 sides）, ribbon shape （4 sides）. （2） The longitudinal diameters of left and right foramen ovales were （7.67±1.32） and （7.98±1.45） mm, and the transverse diameters were （4.04±0.83）, （4.09±1.07） mm; There was no obvious difference between left and right longitudinal diameters （t = 1.63, P = 0.11 ）, and left and right transverse diameters were close （t = 0.45, P= 0.65）. CONCLUSION ： The non-invasive techniques of volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan can clearly display the formand size of foramen ovale in healthy adults.
文摘Objective:This study focused on the clinical application value of dynamic CT perfusion imaging in stroke.Methods:A total of 92 patients with stroke were enrolled in this study.All patients were selected from December 2017 to December 2018 according to different diagnostic methods.They were randomly divided into two groups:the observation group and control group.The number of patients in each group was 46.The observation group mainly used dynamic CT perfusion imaging for diagnosis while the control group mainly used CT plain scan.The diagnostic effects of the two groups of patients and the hemodynamic parameters of the surrounding area of sub-acute hematoma and the acute phase of stroke in the observation group were compared.Results:The clinical diagnosis of the observation group was 95.65%while the clinical diagnosis of the control group was 69.57%.The observation group was higher than that of the control group and the difference was significant.In addition,the hemodynamic parameters of the acute phase of the observation group and the sub-acute hematoma were also varied.Conclusion:Dynamic CT perfusion imaging has significant clinical value in stroke,and it is worthy of further application.
文摘Objective:To compare and analyze the clinical diagnostic value of multi-slice spiral CT and enhanced MRI for primary liver cancer(PLC),and to summarize the imaging findings.Methods:The research subjects in this article were 50 patients with PLC who were admitted to our hospital from 2017 April to 2018 September.After the patients were admitted,they were examined by multi-slice spiral CT and enhanced MRI scanning,and the pathological diagnosis results were followed up.Relevant information was reviewed and analyzed.Results:The detection rate of multi-slice spiral CT was higher than that of MRI in the portal venous phase lesion detection.The difference was statistically significant(P<0.05).The detection rate of lesions in the arterial phase and delayed phase was not statistically significant(P>0.05);the diagnostic accuracy of multi-slice spiral CT was 85.96%,and the diagnostic accuracy of enhanced MRI scanning was 91.11%,which was not statistically significant(P>0.05).MRI scans showed the capsules of primary liver cancer better than CT,but the difference was not statistically significant(P>0.05).Conclusion:In conclusion,both multi-slice spiral CT and enhanced MRI can be used for the effective diagnosis of primary liver cancer intrahepatic lesions.The diagnostic value of the two is equivalent,but enhanced MRI has a slightly higher diagnostic accuracy and can be used as the preferred method.
文摘Background: As the population age structure gradually ages, more and more elderly people were found to have pulmonary nodules during physical examinations. Most elderly people had underlying diseases such as heart, lung, brain and blood vessels and cannot tolerate surgery. Computed tomography (CT)-guided percutaneous core needle biopsy (CNB) was the first choice for pathological diagnosis and subsequent targeted drugs, immune drugs or ablation treatment. CT-guided percutaneous CNB requires clinicians with rich CNB experience to ensure high CNB accuracy, but it was easy to cause complications such as pneumothorax and hemorrhage. Three-dimensional (3D) printing coplanar template (PCT) combined with CT-guided percutaneous pulmonary CNB biopsy has been used in clinical practice, but there was no prospective, randomized controlled study. Methods: Elderly patients with lung nodules admitted to the Department of Oncology of our hospital from January 2019 to January 2023 were selected. A total of 225 elderly patients were screened, and 30 patients were included after screening. They were randomly divided into experimental group (Group A: 30 cases) and control group (Group B: 30 cases). Group A was given 3D-PCT combined with CT-guided percutaneous pulmonary CNB biopsy, Group B underwent CT-guided percutaneous pulmonary CNB. The primary outcome measure of this study was the accuracy of diagnostic CNB, and the secondary outcome measures were CNB time, number of CNB needles, number of pathological tissues and complications. Results: The diagnostic accuracy of group A and group B was 96.67% and 76.67%, respectively (P = 0.026). There were statistical differences between group A and group B in average CNB time (P = 0.001), number of CNB (1 vs more than 1, P = 0.029), and pathological tissue obtained by CNB (3 vs 1, P = 0.040). There was no statistical difference in the incidence of pneumothorax and hemorrhage between the two groups (P > 0.05). Conclusions: 3D-PCT combined with CT-guided percutaneous CNB can improve the puncture accuracy of elderly patients, shorten the puncture time, reduce the number of punctures, and increase the amount of puncture pathological tissue, without increasing pneumothorax and hemorrhage complications. We look forward to verifying this in a phase III randomized controlled clinical study. .
文摘Objective: to explore and analyze the clinical value of CT and MRI in the diagnosis of spinal tuberculosis. Methods: a total of 48 patients with spinal tuberculosis admitted to our hospital from January to December 2020 were selected for the study. All patients received CT and MRI imaging diagnosis successively, and the results of the two imaging examinations were compared and analyzed. Results: the diagnosis results of the two methods for bone disc loss and paravertebral mass are exactly the same, P > 0.05. The detection rate of ligament diffusion, dural cyst and meningeal enhancement by MRI was significantly higher than that by CT, while the detection rate of calcification was significantly lower than that by CT, P<0.05. Conclusion: in the clinical diagnosis of spinal tuberculosis, both CT and MIR have high application value and the diagnostic accuracy of MIR is relatively higher.
文摘Objective: to improve the diagnostic effect of acute pancreatitis, CT examination was adopted this time. Methods: a total of 100 patients with acute pancreatitis in our hospital were selected from July 2020 to July 2021. Results: CT images showed hemorrhage and necrosis type of 30%, edema type of 67%, detection rate of 97%, missed diagnosis rate of 3%, CT images showed high detection rate, and there was no significant difference with pathological examination results (p > 0.05). In 30 cases of hemorrhagic necrotic type, grade A was 8%, grade B was 10%, grade C was 6%, grade D was 4%, grade E was 2%, in 67 cases of simple edematous type, grade A was 21%, grade B was 17%, grade C was 13%, grade D was 10%, grade E was 6%. It can be seen that the proportion of B grade is relatively high in hemorrhagic necrosis type, and the proportion of A grade is relatively high in simple edema type. CT imaging can clearly show the grading of pancreas. Conclusion: CT examination of acute pancreatitis is effective and of good value.
文摘Objective: to analyze the diagnostic value of thyroid CT plain scan + enhanced scan in patients with this study disease. Methods: the clinical data of 194 patients with study diseases from March 2019 to March 2020 were analyzed retrospectively, of which 122 patients were benign, a total of 158;There were 36 patients with malignant tumors, a total of 44. They were divided into regular type (SCC) and irregular type (non SCC) according to calcification. The degree and distribution of calcification were analyzed. At the same time, the satisfaction of patients with examination services was counted. Results: among 122 benign patients, there were 46 patients with regular calcification and 76 patients with irregular calcification. Among the 36 malignant patients, 4 cases were regular and 32 cases were irregular. There were significant differences between regular and irregular types in benign and malignant nodules (P < 0.05);The distribution of benign and malignant nodules in irregular type is quite different from that around calcification after CT scanning, which is comparable (P < 0.05). After 194 patients received the examination, 98 patients were very satisfied with the examination service, 94 patients were relatively satisfied with the examination service, and 2 patients were dissatisfied with the examination service. The satisfaction with the examination service was 98.97%. Conclusion: plain and enhanced CT has certain differential diagnostic significance in the diagnosis of coarse calcification of thyroid nodules, and delayed enhanced CT has higher diagnostic value.
文摘The anatomic relationship of oral and maxillofacial region is very com-plex,due to the large number of sinuses,cavities and spaces,and also closely related to the brain.The diagnosis of oral and maxillofacial lesions usually depends on the imaging examination.The conventional imaging methods are common CT and X-ray plain films.In recent years,with the rapid development of medical science and technology,more intuitive and vivid three-dimensional images have been applied in the diagnosis and treatment of oral and maxillofacial diseases.Therefore,CT three-dimensional imaging technology has been widely used in clinical practice.This paper reviews this topic.
文摘Objective: To deeply analyze and study the clinical value and significance of 64-slice spiral CT in the imaging diagnosis and treatment of pulmonary sarcoidosis. Methods: In this study, the clinical data of 80 patients with pulmonary sarcoidosis admitted to our hospital from January 2019 to January 2020 were selected as the research objects, and all 80 patients were confirmed as pulmonary sarcoidosis by biopsy through retrospective analysis. After that, 64-slice spiral CT examination was performed to compare the results with biopsy results to judge the accuracy of diagnosis, and finally to distinguish the characteristics and clinical manifestations of pulmonary sarcoidosis through imaging data. Results: the biopsy results as the main standard of diagnosis, then by using 64 layer spiral CT examination, the matching degree of up to 100%, no missed diagnosis and misdiagnosis, the 80 patients were characterized by swollen lymph nodes, after using 64 layer spiral CT inspection, found that existence of small amount of pleural effusion 8 patients;There were 45 cases with intrapulmonary changes, including 20 cases with intrapulmonary scattered and subpleural multiple nodules, and the occurrence probability of intrapulmonary changes was 56.3%. Conclusion: 64-slice spiral CT in the diagnosis of pulmonary sarcoidosis, its accuracy is relatively higher, and the operation is more convenient, often can provide more effective reference in the clinical diagnosis and symptomatic treatment process, but also has more extensive clinical promotion significance and value.
文摘Objective To discuss the measurement of bone tumor volume on the basis of three dimensional images segmentation technology. Methods Twenty patients with lacunar bone tumor from Tianjin Hospital and Tongji Hospital were included in the
文摘Objective: to consider the difference and characteristics of clinical diagnosis and treatment of mycoplasma pneumoniae pneumonia in children by X-ray and CT. Methods a total of 120 children with mycoplasma pneumoniae pneumonia received from the department of Pediatrics of our hospital during 2020/8-2020/8 were randomly divided into 2 groups. Among them, X-ray examination technique was selected in the observation group and CT examination technique was selected in the control group, with 60 cases in each group. The clinical diagnosis results of the two groups were compared. Results: There were abnormal changes in the lungs of all the children in the observation group. Finally, it was found that there was local shadow of lung parenchyma, patchy, and a little pleural effusion. The chest manifestations of the control group were different, and the typical manifestations were significantly enlarged hilar shadow and increased lung striae. In addition, the clinical diagnosis rate of the observation group was 96.67%, which was significantly higher than that of the control group (51.67%), indicating a significant difference in the above indicators (P < 0.05). Results: The clinical manifestations of mycoplasma pneumoniae pneumonia in children are not single, and they are diversified. Good diagnostic results can be obtained by using CT and X-ray technology for examination. However, the clinical diagnosis rate of CT technology is relatively high, so to ensure the accuracy and efficiency of clinical diagnosis results, It is usually necessary to carry out comprehensive evaluation based on clinical manifestations, changes in physical signs, laboratory examination structure, X-ray and CT examination, so as to bring support and guidance for timely and standardized treatment of children as soon as possible.
文摘To analyze the value of multi-slice spiral CT in diagnosing the severity of type 2 diabetic foot. Methods: A total of 98 patients with type 2 diabetes treated in our hospital from January 2020 to July 2021 were randomly selected for this study. Pathological diagnosis of all patients showed that 28 patients with diabetic foot (Wagner grade 0-2 in 18 cases and grade 3-4 in 10 cases) were diagnosed by multi-slice spiral CT. The clinical data of patients with type 2 diabetes mellitus and patients with type 2 diabetic foot were measured. The cross-sectional area of lower extremity artery diameter of the two groups and the cross-sectional area of lower extremity artery diameter of patients with different degrees of diabetic foot were recorded, and the results were statistically compared. Results: Blood, TC and hs-CRP were higher on the second day after meal (P < 0.05), but there was no significant difference in other data (P > 0.05). Compared with patients with type 2 diabetes alone, the cross-sectional areas of spinal artery, adrenal artery and anterior tibial artery in patients with type 2 diabetes mellitus and diabetic foot were not significantly different (P > 0.05), but the cross-sectional areas of posterior tibial artery, tibial artery and femoral artery were smaller (P < 0.05). Compared with Wagner grade 0-2, the cross-sectional area of spinal artery in patients with grade 3-4 was higher than that of Wagner grade 0-2 (P > 0.05), but the cross-sectional area of posterior tibial artery, tibial artery and femoral artery was smaller (P < 0.05). Conclusion: In clinical diagnosis of the severity of type 2 diabetic foot patients, the application of multi-slice spiral CT can provide reliable guidance for clinical diagnosis, and has high promotion value.
文摘Objective: To analyze and study the diagnostic value of multi-slice spiral CT and magnetic resonance imaging in patients with occult fractures. Methods: Forty patients from our hospital with occult fractures were selected as the observation group for MRI diagnosis, and 40 patients as the control group for ct diagnosis. The positive detection rates of patients in the two groups were compared. Results The diagnostic effect of MRI technique was superior to that of CT technique (P < 0.05), and the positive detection rate of patients in the control group was lower than that of patients in the observation group. Conclusion The value of MRI three-dimensional reconstruction in patients with occult fractures is higher than that of multi-slice spiral CT technology, the fracture data of patients detected are more accurate, and the effect of its application value is more significant in the case of occult complex fractures, which is worthy of promotion in all hospitals.
文摘Objective: to study the clinical value of CT examination in patients with gastrointestinal perforation and abdominal infection. Methods: 200 patients with gastrointestinal perforation and abdominal infection who were treated in our hospital from February 2016 to August 2019 were selected as the research objects. All patients underwent CT scanning. The results of doctors' reading were recorded and analyzed. The locations of gastrointestinal perforation were summarized and the CT manifestations were analyzed. Results: among the 200 patients, 164 had perforation of upper digestive tract and 36 had perforation of lower digestive tract. There were 91 cases (45.50%) of duodenal perforation, 73 cases (36.50%) of gastric perforation, 28 cases (14.00%) of appendiceal perforation and 8 cases (4.00%) of other intestinal perforation. The main sign of diagnosing digestive tract perforation is abdominal cavity gas accumulation, in which 52.00% of the patients show large amount of gas accumulation and 39.00% of the patients show small amount of gas accumulation;CT signs of abdominal infection include ascites and effusion, and signs of enlarged lymph nodes, abdominal abscess and peritoneal thickening also support abdominal infection. Conclusion: CT examination of patients with gastrointestinal perforation and abdominal cavity infection has high diagnostic value. Abdominal cavity gas accumulation and effusion are the main signs of CT diagnosis.
