Cerebral angiography with prospective ECG triggering preliminary study of dual-source CT

VernacularTitle:双源CT前瞻性心电触发技术用于脑血管成像的初步研究
Author: Yuejun XUE ; Nong QIAN ; Yanhui SHAO ; Changjie PAN ; Weiliang RONG ; Yiqun XU
Publication Type:Journal Article
Keywords: Cerebral CTA; X-ray computed tomography; Radiation dose; Image quality
From: Chinese Journal of Radiological Medicine and Protection 2012;32(3):326-328
CountryChina
Language:Chinese
Abstract: Objective To study the image quality and radiation dose in dual-source CT cerebral angiography with prospective ECG-triggered sequence mode (step-and-shoot,SAS).Methods A total of forty-three patients with clinically suspected cerebral vascular disease underwent cerebral CT angiography with prospective ECG-triggering (step-and-shoot,SAS).Data acquisition was at 60％ R-R interval of the ECG presentation mode.The post-processing included maximum intensity projection (MIP),multiplanar reformation (MPR) and volume rendering (VR).The CTA image quality,radiation dose and rates of excellent images were evaluated.Results The CTA image quality score was 4.72 ± 0.50 and 97.7％ (42/43) patients had excellent CTA images.The average effective dose of SAS-CTA was (0.22 ± 0.01 )mSv,which was lower by 76.31％ than that of DE-CTA.Conclusions Prospective ECG-triggering sequence could be used in cerebral angiography with a significant reduction in radiation dose and diagnostic image quality.