Objective:We evaluated who would need further evaluations such as retrograde pyelography(RP)and/or ureteroscopy to diagnose upper urinary tract urothelial cancers(UUTUCs)when abnormal findings for the upper urinary tr...Objective:We evaluated who would need further evaluations such as retrograde pyelography(RP)and/or ureteroscopy to diagnose upper urinary tract urothelial cancers(UUTUCs)when abnormal findings for the upper urinary tract(UUT)were detected by enhanced computed tomography(CT).Methods:We retrospectively analyzed 125 patients who underwent enhanced CT for various reasons and had abnormal findings for the UUT.Patients whose tumors were suspected to be of extraureteral origin were excluded.All patients received RP and/or ureteroscopy to evaluate the UUTUCs.Results:The median age of the 125 patients was 70 years and gross hematuria(26.4%)was the most frequently observed symptoms.RP,ureteroscopy and both were performed for 121,59 and 55 patients,respectively.CT revealed tumor-like lesions in 58 patients and the other patients had non-tumor-like lesions.UUTUCs were found in 43(34.4%)of the 125 patients.All of them had tumor-like lesions on CT.In 58 patients who had tumor-like lesions on CT,univariate and multivariate analyses revealed that tumor diameter and tumor enhancement were significant predictive factors for UUTUCs.ROC curve analysis of enhanced CT to diagnose UUTUCs revealed that a tumor diameter of 18 mm was the best cutoff point.The sensitivity,specificity and accuracy were 90.0%,98.8% and 92.7% for RP and 95.5%,100% and 97.1%for ureteroscopy,respectively.Both of them had high sensitivity,specificity and accuracy.Conclusion:We should decide to evaluate the UUT according to the tumor diameter on enhanced CT.When we evaluate the UUT in patients with tumor diameters of less than 20 mm,ureteroscopy is recommended.展开更多
Colorectal cancer,a malignant lesion of the intestines,significantly affects human health and life,emphasizing the necessity of early detection and treatment.Accurate segmentation of colorectal cancer regions directly...Colorectal cancer,a malignant lesion of the intestines,significantly affects human health and life,emphasizing the necessity of early detection and treatment.Accurate segmentation of colorectal cancer regions directly impacts subsequent staging,treatment methods,and prognostic outcomes.While colonoscopy is an effective method for detecting colorectal cancer,its data collection approach can cause patient discomfort.To address this,current research utilizes Computed Tomography(CT)imaging;however,conventional CT images only capture transient states,lacking sufficient representational capability to precisely locate colorectal cancer.This study utilizes enhanced CT images,constructing a deep feature network from the arterial,portal venous,and delay phases to simulate the physician’s diagnostic process and achieve accurate cancer segmentation.The innovations include:1)Utilizing portal venous phase CT images to introduce a context-aware multi-scale aggregation module for preliminary shape extraction of colorectal cancer.2)Building an image sequence based on arterial and delay phases,transforming the cancer segmentation issue into an anomaly detection problem,establishing a pixel-pairing strategy,and proposing a colorectal cancer segmentation algorithm using a Siamese network.Experiments with 84 clinical cases of colorectal cancer enhanced CT data demonstrated an Area Overlap Measure of 0.90,significantly better than Fully Convolutional Networks(FCNs)at 0.20.Future research will explore the relationship between conventional and enhanced CT to further reduce segmentation time and improve accuracy.展开更多
Objective: to analyze the role of dynamic magnetic resonance enhancement in imaging diagnosis of early hepatocellular carcinoma. Methods: sixty-two patients with hepatocytic lesions who were enrolled in our hospital f...Objective: to analyze the role of dynamic magnetic resonance enhancement in imaging diagnosis of early hepatocellular carcinoma. Methods: sixty-two patients with hepatocytic lesions who were enrolled in our hospital from June 2019 to June 2020 were selected as the research subjects. All patients were examined by dynamic enhanced CT scan and liver MRI. The diagnostic results of the two different methods were analyzed based on pathological examination, and their diagnostic value was compared. Conclusion: liver MRI examination in patients with HCC has relatively high sensitivity and specificity, and excellent application effect, which can provide accurate basis for early diagnosis and later targeted treatment by doctors, and is worthy of clinical application and vigorous promotion.展开更多
Objective:To investigate the diagnostic effects of enhanced CT scan on hemorrhage corpus luteum cyst(HCLC).Methods:The clinical data of 24 patients with hemorrhage corpus luteum cyst diagnosed by surgery and pathology...Objective:To investigate the diagnostic effects of enhanced CT scan on hemorrhage corpus luteum cyst(HCLC).Methods:The clinical data of 24 patients with hemorrhage corpus luteum cyst diagnosed by surgery and pathology in our hospital were collected.All patients received enhanced CT scan to evaluate the diagnostic value of CT.Results:The average diameter of the cysts in this group of patients was 5.1cm by CT.Further detection of the ruptured cyst wall showed that there was a liquid lowdensity shadow.Some of the cysts were accompanied by signs of increased density,indicating the presence of blood clots;all patients received surgical treatment.Intraoperative ultrasound examination of the cysts had an average diameter of 5.2cm and a wall of 0.2~0.4mm.Among them,19 cases of cysts contained"coffee-colored"liquid with varying degrees of blood clots,and 5 cases had no blood clots in the cysts but there were a lot of blood clots beside the cysts.Conclusion:The application of enhanced CT scan in patients with hemorrhage corpus luteum cyst is of great value.It can provide accurate data reference for clinical treatment and is worthy of promoting its clinical application.展开更多
Objective:To study the correlation between CT dynamic enhanced scanning parameters and serum tumor markers before and after radiofrequency ablation in patients with lung cancer.Methods:60 patients with advanced non-sm...Objective:To study the correlation between CT dynamic enhanced scanning parameters and serum tumor markers before and after radiofrequency ablation in patients with lung cancer.Methods:60 patients with advanced non-small cell lung cancer who were treated in this hospital between January 2015 and January 2017 were divided into control group(n=30)and observation group(n=30)by random number table method.Control group received conventional intravenous chemotherapy,and observation group received intravenous chemotherapy combined with radiofrequency ablation.The differences in CT dynamic enhanced scanning parameter levels and serum tumor marker contents were compared between the two groups of patients before and after treatment.Pearson test was used to evaluate the correlation between CT dynamic enhanced scanning parameters and serum tumor marker contents in patients with advanced non-small cell lung cancer.Results:Before treatment,the differences in CT dynamic enhanced scanning parameter levels,non-organ-specific tumor marker contents and vascular tumor marker contents were not statistically significant between the two groups of patients(P>0.05).After treatment,CT dynamic enhanced scanning parameters PH and perfusion value levels of observation group were lower than those of control group(P<0.05);serum non-organ specific tumor markers CA125,CA153,CEA and CYFRA21-1 contents of observation group were lower than those of control group;serum vascular tumor markers VEGF,Ang-2,HIF-1 and MMP-9 contents were lower than those of control group(P<0.05).Pearson test showed that CT dynamic enhanced scanning parameters PH and perfusion value levels in patients with non-small cell lung cancer were positively correlated with serum non-organ specific tumor marker and vascular tumor marker contents.Conclusion:Adjuvant radiofrequency ablation can significantly reduce the tumor malignancy of patients with advanced non-small cell lung cancer.展开更多
Objective: to investigate the application value of enhanced CT delayed scan in differential diagnosis of liver tumors. Methods: in this paper, 102 patients with liver tumor who were enrolled in a hospital in this city...Objective: to investigate the application value of enhanced CT delayed scan in differential diagnosis of liver tumors. Methods: in this paper, 102 patients with liver tumor who were enrolled in a hospital in this city from January 2020 to March 2021 were analyzed and studied. All patients received CT enhanced time-delay scan to analyze the influence of CT on manifestations and to study and analyze the diagnostic results. Results: the difference between the results of enhanced delayed CT scanning and pathological diagnosis was only about 10%. Conclusion: CT enhanced delayed scanning has good safety and high diagnostic accuracy in the diagnosis of liver tumors, which has clinical application 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
Objective: to study the diagnostic value of solitary pulmonary nodules on dynamic enhancement of CT scan. Methods: the clinical data of 100 patients with solitary pulmonary nodules in our hospital from January 2018 to...Objective: to study the diagnostic value of solitary pulmonary nodules on dynamic enhancement of CT scan. Methods: the clinical data of 100 patients with solitary pulmonary nodules in our hospital from January 2018 to December 2020 were analyzed retrospectively. All patients underwent dynamic enhancement of CT scanning, and the results of pathological examination and CT scanning were compared and analyzed. Results: in the comparison between dynamic enhancement of CT scan and pathological examination, 95.83% were the diagnostic coincidence rate of malignant pulmonary nodules and 93.33% were benign pulmonary nodules. The coincidence rate of benign and malignant pulmonary nodules before and after enhanced scan was significantly lower than that after enhanced scan (P < 0.05);There was significant difference in CT value between benign and malignant pulmonary nodules (P < 0.05). Conclusion: in the differential diagnosis and diagnosis of solitary pulmonary nodules by dynamic contrast-enhanced CT scanning, it is worthy of clinical application and has high application value.展开更多
Objective:To investigate the etiological characteristics,clinical manifestations,and early identification methods of neonatal brain abscess.Methods:The baseline characteristics,clinical manifestations,and laboratory r...Objective:To investigate the etiological characteristics,clinical manifestations,and early identification methods of neonatal brain abscess.Methods:The baseline characteristics,clinical manifestations,and laboratory results of 12 neonatal brain abscess cases were retrospectively analyzed.Results:The clinical manifestations were fever,convulsion,and lethargy.A small number of them had respiratory and circulatory failure.The diagnosis made was based on imaging examination.All 12 cases were confirmed by cranial enhanced computed tomography(CT)or magnetic resonance imaging(MRI).Blood cultures of 9 cases were positive,with Escherichia coli in 6 cases,β-hemolytic Streptococcus in 1 case,methicillin-resistant Staphylococcus aureus in 1 case,and Enterococcus faecium in 1 case.However,only 3 of them had positive cerebrospinal fluid(CSF)cultures.All the 12 neonates were treated with antibiotic therapy upon admission,with only 3 cases treated with surgery.Among them,4 recovered and were discharged,while the remaining 8 discontinued their therapy.Conclusion:Escherichia coli is the most common pathogen of neonatal brain abscess in our study.The clinical manifestations of neonatal brain abscess are atypical,and the prognosis is poor.Respiratory and circulatory failure in children with intracranial infection may indicate the presence of brain abscess.For children with suspected brain abscess,cranial enhanced CT or MRI should be performed as soon as possible to make an early diagnosis.The prevention of brain abscess should be prioritized;neonates with sepsis or meningitis should receive prompt and strong antibiotic therapy in an effort to prevent the development of brain abscess.展开更多
Objective: to study the diagnostic effect of one case of pulmonary sequestration using plain CT, CT enhancement and three-dimensional reconstruction. Methods: one case of pulmonary sequestration was treated with plain...Objective: to study the diagnostic effect of one case of pulmonary sequestration using plain CT, CT enhancement and three-dimensional reconstruction. Methods: one case of pulmonary sequestration was treated with plain CT scan, anti-infection therapy, CT enhancement and three-dimensional reconstruction analysis. Results: the patient underwent plain chest CT scan, and local bronchiectasis and infection were found in the dorsal segment of the lower lobe of the left lung. After one week of anti-infection treatment, the chest was examined with CT enhancement and three-dimensional reconstruction. The isolated lesion near the mediastinum in the lower lobe of the left lung was in line with the manifestations of pulmonary sequestration (intralobal type), and was definitely diagnosed as pulmonary sequestration. Conclusion: the use of plain CT scan, CT enhancement and three-dimensional reconstruction can effectively improve the diagnostic effect of pulmonary sequestration and has high value in use.展开更多
文摘Objective:We evaluated who would need further evaluations such as retrograde pyelography(RP)and/or ureteroscopy to diagnose upper urinary tract urothelial cancers(UUTUCs)when abnormal findings for the upper urinary tract(UUT)were detected by enhanced computed tomography(CT).Methods:We retrospectively analyzed 125 patients who underwent enhanced CT for various reasons and had abnormal findings for the UUT.Patients whose tumors were suspected to be of extraureteral origin were excluded.All patients received RP and/or ureteroscopy to evaluate the UUTUCs.Results:The median age of the 125 patients was 70 years and gross hematuria(26.4%)was the most frequently observed symptoms.RP,ureteroscopy and both were performed for 121,59 and 55 patients,respectively.CT revealed tumor-like lesions in 58 patients and the other patients had non-tumor-like lesions.UUTUCs were found in 43(34.4%)of the 125 patients.All of them had tumor-like lesions on CT.In 58 patients who had tumor-like lesions on CT,univariate and multivariate analyses revealed that tumor diameter and tumor enhancement were significant predictive factors for UUTUCs.ROC curve analysis of enhanced CT to diagnose UUTUCs revealed that a tumor diameter of 18 mm was the best cutoff point.The sensitivity,specificity and accuracy were 90.0%,98.8% and 92.7% for RP and 95.5%,100% and 97.1%for ureteroscopy,respectively.Both of them had high sensitivity,specificity and accuracy.Conclusion:We should decide to evaluate the UUT according to the tumor diameter on enhanced CT.When we evaluate the UUT in patients with tumor diameters of less than 20 mm,ureteroscopy is recommended.
基金This work is supported by the Natural Science Foundation of China(No.82372035)National Transportation Preparedness Projects(No.ZYZZYJ).Light of West China(No.XAB2022YN10)The China Postdoctoral Science Foundation(No.2023M740760).
文摘Colorectal cancer,a malignant lesion of the intestines,significantly affects human health and life,emphasizing the necessity of early detection and treatment.Accurate segmentation of colorectal cancer regions directly impacts subsequent staging,treatment methods,and prognostic outcomes.While colonoscopy is an effective method for detecting colorectal cancer,its data collection approach can cause patient discomfort.To address this,current research utilizes Computed Tomography(CT)imaging;however,conventional CT images only capture transient states,lacking sufficient representational capability to precisely locate colorectal cancer.This study utilizes enhanced CT images,constructing a deep feature network from the arterial,portal venous,and delay phases to simulate the physician’s diagnostic process and achieve accurate cancer segmentation.The innovations include:1)Utilizing portal venous phase CT images to introduce a context-aware multi-scale aggregation module for preliminary shape extraction of colorectal cancer.2)Building an image sequence based on arterial and delay phases,transforming the cancer segmentation issue into an anomaly detection problem,establishing a pixel-pairing strategy,and proposing a colorectal cancer segmentation algorithm using a Siamese network.Experiments with 84 clinical cases of colorectal cancer enhanced CT data demonstrated an Area Overlap Measure of 0.90,significantly better than Fully Convolutional Networks(FCNs)at 0.20.Future research will explore the relationship between conventional and enhanced CT to further reduce segmentation time and improve accuracy.
文摘Objective: to analyze the role of dynamic magnetic resonance enhancement in imaging diagnosis of early hepatocellular carcinoma. Methods: sixty-two patients with hepatocytic lesions who were enrolled in our hospital from June 2019 to June 2020 were selected as the research subjects. All patients were examined by dynamic enhanced CT scan and liver MRI. The diagnostic results of the two different methods were analyzed based on pathological examination, and their diagnostic value was compared. Conclusion: liver MRI examination in patients with HCC has relatively high sensitivity and specificity, and excellent application effect, which can provide accurate basis for early diagnosis and later targeted treatment by doctors, and is worthy of clinical application and vigorous promotion.
文摘Objective:To investigate the diagnostic effects of enhanced CT scan on hemorrhage corpus luteum cyst(HCLC).Methods:The clinical data of 24 patients with hemorrhage corpus luteum cyst diagnosed by surgery and pathology in our hospital were collected.All patients received enhanced CT scan to evaluate the diagnostic value of CT.Results:The average diameter of the cysts in this group of patients was 5.1cm by CT.Further detection of the ruptured cyst wall showed that there was a liquid lowdensity shadow.Some of the cysts were accompanied by signs of increased density,indicating the presence of blood clots;all patients received surgical treatment.Intraoperative ultrasound examination of the cysts had an average diameter of 5.2cm and a wall of 0.2~0.4mm.Among them,19 cases of cysts contained"coffee-colored"liquid with varying degrees of blood clots,and 5 cases had no blood clots in the cysts but there were a lot of blood clots beside the cysts.Conclusion:The application of enhanced CT scan in patients with hemorrhage corpus luteum cyst is of great value.It can provide accurate data reference for clinical treatment and is worthy of promoting its clinical application.
基金Health and Family Planning Commission of Zigong(No.2017wZCS09)
文摘Objective:To study the correlation between CT dynamic enhanced scanning parameters and serum tumor markers before and after radiofrequency ablation in patients with lung cancer.Methods:60 patients with advanced non-small cell lung cancer who were treated in this hospital between January 2015 and January 2017 were divided into control group(n=30)and observation group(n=30)by random number table method.Control group received conventional intravenous chemotherapy,and observation group received intravenous chemotherapy combined with radiofrequency ablation.The differences in CT dynamic enhanced scanning parameter levels and serum tumor marker contents were compared between the two groups of patients before and after treatment.Pearson test was used to evaluate the correlation between CT dynamic enhanced scanning parameters and serum tumor marker contents in patients with advanced non-small cell lung cancer.Results:Before treatment,the differences in CT dynamic enhanced scanning parameter levels,non-organ-specific tumor marker contents and vascular tumor marker contents were not statistically significant between the two groups of patients(P>0.05).After treatment,CT dynamic enhanced scanning parameters PH and perfusion value levels of observation group were lower than those of control group(P<0.05);serum non-organ specific tumor markers CA125,CA153,CEA and CYFRA21-1 contents of observation group were lower than those of control group;serum vascular tumor markers VEGF,Ang-2,HIF-1 and MMP-9 contents were lower than those of control group(P<0.05).Pearson test showed that CT dynamic enhanced scanning parameters PH and perfusion value levels in patients with non-small cell lung cancer were positively correlated with serum non-organ specific tumor marker and vascular tumor marker contents.Conclusion:Adjuvant radiofrequency ablation can significantly reduce the tumor malignancy of patients with advanced non-small cell lung cancer.
文摘Objective: to investigate the application value of enhanced CT delayed scan in differential diagnosis of liver tumors. Methods: in this paper, 102 patients with liver tumor who were enrolled in a hospital in this city from January 2020 to March 2021 were analyzed and studied. All patients received CT enhanced time-delay scan to analyze the influence of CT on manifestations and to study and analyze the diagnostic results. Results: the difference between the results of enhanced delayed CT scanning and pathological diagnosis was only about 10%. Conclusion: CT enhanced delayed scanning has good safety and high diagnostic accuracy in the diagnosis of liver tumors, which has clinical application 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Objective: to study the diagnostic value of solitary pulmonary nodules on dynamic enhancement of CT scan. Methods: the clinical data of 100 patients with solitary pulmonary nodules in our hospital from January 2018 to December 2020 were analyzed retrospectively. All patients underwent dynamic enhancement of CT scanning, and the results of pathological examination and CT scanning were compared and analyzed. Results: in the comparison between dynamic enhancement of CT scan and pathological examination, 95.83% were the diagnostic coincidence rate of malignant pulmonary nodules and 93.33% were benign pulmonary nodules. The coincidence rate of benign and malignant pulmonary nodules before and after enhanced scan was significantly lower than that after enhanced scan (P < 0.05);There was significant difference in CT value between benign and malignant pulmonary nodules (P < 0.05). Conclusion: in the differential diagnosis and diagnosis of solitary pulmonary nodules by dynamic contrast-enhanced CT scanning, it is worthy of clinical application and has high application value.
文摘Objective:To investigate the etiological characteristics,clinical manifestations,and early identification methods of neonatal brain abscess.Methods:The baseline characteristics,clinical manifestations,and laboratory results of 12 neonatal brain abscess cases were retrospectively analyzed.Results:The clinical manifestations were fever,convulsion,and lethargy.A small number of them had respiratory and circulatory failure.The diagnosis made was based on imaging examination.All 12 cases were confirmed by cranial enhanced computed tomography(CT)or magnetic resonance imaging(MRI).Blood cultures of 9 cases were positive,with Escherichia coli in 6 cases,β-hemolytic Streptococcus in 1 case,methicillin-resistant Staphylococcus aureus in 1 case,and Enterococcus faecium in 1 case.However,only 3 of them had positive cerebrospinal fluid(CSF)cultures.All the 12 neonates were treated with antibiotic therapy upon admission,with only 3 cases treated with surgery.Among them,4 recovered and were discharged,while the remaining 8 discontinued their therapy.Conclusion:Escherichia coli is the most common pathogen of neonatal brain abscess in our study.The clinical manifestations of neonatal brain abscess are atypical,and the prognosis is poor.Respiratory and circulatory failure in children with intracranial infection may indicate the presence of brain abscess.For children with suspected brain abscess,cranial enhanced CT or MRI should be performed as soon as possible to make an early diagnosis.The prevention of brain abscess should be prioritized;neonates with sepsis or meningitis should receive prompt and strong antibiotic therapy in an effort to prevent the development of brain abscess.
文摘Objective: to study the diagnostic effect of one case of pulmonary sequestration using plain CT, CT enhancement and three-dimensional reconstruction. Methods: one case of pulmonary sequestration was treated with plain CT scan, anti-infection therapy, CT enhancement and three-dimensional reconstruction analysis. Results: the patient underwent plain chest CT scan, and local bronchiectasis and infection were found in the dorsal segment of the lower lobe of the left lung. After one week of anti-infection treatment, the chest was examined with CT enhancement and three-dimensional reconstruction. The isolated lesion near the mediastinum in the lower lobe of the left lung was in line with the manifestations of pulmonary sequestration (intralobal type), and was definitely diagnosed as pulmonary sequestration. Conclusion: the use of plain CT scan, CT enhancement and three-dimensional reconstruction can effectively improve the diagnostic effect of pulmonary sequestration and has high value in use.
