Background Although Multi-planar reconstruction （MPR） has been considered a diagnostic imaging technique that observes more perspectives for diseases,few people have applied it surgically.In fact,MPR is also very us...Background Although Multi-planar reconstruction （MPR） has been considered a diagnostic imaging technique that observes more perspectives for diseases,few people have applied it surgically.In fact,MPR is also very useful to clinical operation,especially for patients with type B aortic dissection.It helps the surgeon to locate accurately with more information about aortic dissection,so that the safety and effectiveness of operation can be improved.This study examined the application of the MPR in intraoperative DSA imaging for precise positioning by accurately obtaining a crosssection,a spin angle of the coronal plane,and a tilt angle of the sagittal plane in treatment of type B aortic dissection.Methods The conventional and the MPR approaches were compared on positioning the aortic arch for surgery.A group of 40 patients （group A） and another group of 42 patients （group B） was sampled.About the comparison of baseline characteristics,a fourfold table X2 test was conducted on gender,and two independent samples t-test was applied to age between group A and group B.Spin as well as tilt angles for group A were obtained from the patients using both approaches,and their effectiveness was compared with pair t-tests; The MPR data guided stent-grafting in this group.Stent graft placement of group B was based on the conventional approach.Percentages of proximal distributed markers as well as incidences of complications were collected from both groups after stent graft placement.They were also compared with a fourfold table X2 test.Results Gender difference was not found between group A and group B （X2=0.80,P ＞0.05）,and age difference was not statistically significant （F=2.55,homogeneity of variance,t=-1.46,P ＞0.05）.A significant difference was found between the conventional and the MPR approaches for spin angle （t=9.17） as well as tilt angle （t=-2.07）,P ＜0.05.Percentage of proximal distributed markers （5.0％） of group A was significantly lower than that of group B （42.9％）,X2=15.92,P ＜0.05;and incidence of complications （5.0％） of group A was also significant lower than that of group B （21.4％）,X2=4.76,P ＜0.05.Conclusions Application of the MPR facilitated intraoperative angle adaption and led to satisfactory DSA.It is feasible in endovascular treatment of type B aortic dissection,and can effectively and safely guide surgical operations.展开更多
目的探索医学影像存档与通信系统(picture archiving and communication system,PACS)框架内的锥形束CT(cone beam CT,CBCT)牙科处理模块在种植患者图像后处理及分析测量中的作用。方法研发内嵌于PACS的牙科后处理模块(包括曲面重组和...目的探索医学影像存档与通信系统(picture archiving and communication system,PACS)框架内的锥形束CT(cone beam CT,CBCT)牙科处理模块在种植患者图像后处理及分析测量中的作用。方法研发内嵌于PACS的牙科后处理模块(包括曲面重组和连续多轴牙科重建)。选取南京市口腔医院3种CBCT设备共计270例种植患者的CBCT图像,由1名影像科医师进行种植区域图像重建及骨量测量。方法1为使用上传至PACS的医学数字成像与通信(digital imaging and communications in medicine,DICOM)数据使用该牙科处理模块进行图像重建及骨量测量,方法2为使用各CBCT设备刻录生成的光盘数据并使用光盘自带的图像后处理软件进行图像重建及骨量测量。计算2种方法的时长并进行统计学分析,统计2种方法骨量测量结果的一致性,同时对使用2种方法的影像科医技人员及种植科医师共计10人开展问卷调查,评估2种方法的使用满意度。结果3种CBCT设备使用2种方法的图像上传/刻录、图像打开时长、图像后处理时长及总时长均具有显著的统计学差异,方法1所耗时长较方法2明显缩短(P<0.001),2种方法骨量测量结果具有良好的一致性。使用者满意度的问卷调查表明方法1优于方法2(P<0.001)。结论内嵌于PACS的图像后处理模块适用于种植患者CBCT图像后处理及测量分析,可显著提升临床工作效率。展开更多
文摘Background Although Multi-planar reconstruction （MPR） has been considered a diagnostic imaging technique that observes more perspectives for diseases,few people have applied it surgically.In fact,MPR is also very useful to clinical operation,especially for patients with type B aortic dissection.It helps the surgeon to locate accurately with more information about aortic dissection,so that the safety and effectiveness of operation can be improved.This study examined the application of the MPR in intraoperative DSA imaging for precise positioning by accurately obtaining a crosssection,a spin angle of the coronal plane,and a tilt angle of the sagittal plane in treatment of type B aortic dissection.Methods The conventional and the MPR approaches were compared on positioning the aortic arch for surgery.A group of 40 patients （group A） and another group of 42 patients （group B） was sampled.About the comparison of baseline characteristics,a fourfold table X2 test was conducted on gender,and two independent samples t-test was applied to age between group A and group B.Spin as well as tilt angles for group A were obtained from the patients using both approaches,and their effectiveness was compared with pair t-tests; The MPR data guided stent-grafting in this group.Stent graft placement of group B was based on the conventional approach.Percentages of proximal distributed markers as well as incidences of complications were collected from both groups after stent graft placement.They were also compared with a fourfold table X2 test.Results Gender difference was not found between group A and group B （X2=0.80,P ＞0.05）,and age difference was not statistically significant （F=2.55,homogeneity of variance,t=-1.46,P ＞0.05）.A significant difference was found between the conventional and the MPR approaches for spin angle （t=9.17） as well as tilt angle （t=-2.07）,P ＜0.05.Percentage of proximal distributed markers （5.0％） of group A was significantly lower than that of group B （42.9％）,X2=15.92,P ＜0.05;and incidence of complications （5.0％） of group A was also significant lower than that of group B （21.4％）,X2=4.76,P ＜0.05.Conclusions Application of the MPR facilitated intraoperative angle adaption and led to satisfactory DSA.It is feasible in endovascular treatment of type B aortic dissection,and can effectively and safely guide surgical operations.
文摘目的探索医学影像存档与通信系统(picture archiving and communication system,PACS)框架内的锥形束CT(cone beam CT,CBCT)牙科处理模块在种植患者图像后处理及分析测量中的作用。方法研发内嵌于PACS的牙科后处理模块(包括曲面重组和连续多轴牙科重建)。选取南京市口腔医院3种CBCT设备共计270例种植患者的CBCT图像,由1名影像科医师进行种植区域图像重建及骨量测量。方法1为使用上传至PACS的医学数字成像与通信(digital imaging and communications in medicine,DICOM)数据使用该牙科处理模块进行图像重建及骨量测量,方法2为使用各CBCT设备刻录生成的光盘数据并使用光盘自带的图像后处理软件进行图像重建及骨量测量。计算2种方法的时长并进行统计学分析,统计2种方法骨量测量结果的一致性,同时对使用2种方法的影像科医技人员及种植科医师共计10人开展问卷调查,评估2种方法的使用满意度。结果3种CBCT设备使用2种方法的图像上传/刻录、图像打开时长、图像后处理时长及总时长均具有显著的统计学差异,方法1所耗时长较方法2明显缩短(P<0.001),2种方法骨量测量结果具有良好的一致性。使用者满意度的问卷调查表明方法1优于方法2(P<0.001)。结论内嵌于PACS的图像后处理模块适用于种植患者CBCT图像后处理及测量分析,可显著提升临床工作效率。
