大螺距双源CT采用bolus-tracking团注法冠状动脉成像的可行性.pdfVIP

中国医学影像技术 2012 年第 28 卷第 11 期 Chin J Med Imaging Technol ,2012 ,Vol 饵， No 11 • 2083 • 个影像技术学 Feasibility of bolus-tracking technique in coronary computed tomography angiography with high-pitch dual-source CT SUN Kai , HAN Rui-juan • ZHAO Rui ρing , MA Li-jun 1 , CUI Li-fang 1 , LI Li-gang 3 , CHEN liu-hong 3 (1. Imaging Ce1lter , 2. Department of Cardiulogy , Daotou Centrαl Hospital , Baotou 014040 , China; 3. CT BM Clinic Maγketing. Siemens Healthcare , Beijing 100071 , China) [Abstract] Objective To assess the enhancement effect and radiation doses of coronary computed tomography angiogra phy (CCTA) using bolus-tracking technique shortened instructional time of respiration with high-pitch dual-source CT (DSCT). Methods TotaUy 184 patients of suspected coronary artcry disease were collected , and were randomly divided in to two groups. Patients in group A (n= 92) underwent CCTA using bolus-tracking technique shortened instructional time of respiration with high-pitch spiral acquisition mode (Flash Spiral mode). while in group B (η=92) underwent CCTA u sing test-bolus technique. CT value of the ascending aorta. image noise. CNR and radiation doses of two groups were as sessed. Resu Its There was no significant difference for CT value of the ascending aorta , image noise. CNR between the two groups (all PO. 05). There were no significant differences in the radiation dose of dynamic moniton:，挝 scans and the angiographic between the two groups (all P O. 05). ConcIusion In high-pitch DSCT. comparing with test-bolus tech nique , bolus-tracking techn