Original Article
Application value of triple rule-out CT angiography in emergency chest pain examination
Jiayi Liu, Zixu Yan, Nan Zhang, Yanchun Sun, Dongting Liu, Yu Li, Zhaoying Wen, Wei Yu, Zhanming Fan
Published 2017-05-08
Cite as Chin Med, 2017, 12(5): 711-715. DOI: 10.3760/cma.j.issn.1673-4777.2017.05.017
Abstract
ObjectiveTo evaluate the value of triple rule-out CT angiography(CTA) in emergency chest pain patients with GE Revolution CT.
MethodsSixty-five patients with emergency chest pain were prospectively enrolled from October 2015 to April 2016 in Beijing Anzhen Hospital, Capital Medical University. The patients had triple rule-out CTA scanning and were divided into low heart rate(HR) group(<70 times/min) and high HR group(≥70 times/min). Appropriate image reconstruction techniques were adopted for coronary artery, pulmonary artery and aorta. Image quality and diagnostic value of triple rule-out CTA were evaluated.
ResultsThe mean exposure time was (2.54±0.15)s, including 0.30 s for coronary and pulmonary artery, (2.24±0.15)s for whole aorta. The mean radiation dose was (7.3±1.7)mSv (4.59-11.97 mSv). Aorta image quality score had no significant difference between high HR group and low HR group[(2.94±0.34)scores vs (2.98±0.12)scores](P>0.05). Pulmonary artery image quality score had no significant difference between high HR group and low HR group[(2.66±0.58)scores vs (2.78±0.54)scores](P>0.05). Coronary artery image quality score in high HR group was significantly lower than that in low HR group[(1.94±0.66)scores vs (2.59±0.57)scores](P<0.01). Mean CT values of different segments of aorta, pulmonary artery and coronary artery were above 300 HU. CT value, signal-to-noise ratio and contrast-to-noise ratio had no significant difference between groups(P>0.05).
ConclusionsTriple rule-out CTA shows short exposure time, low radiation dose and large coverage range; high quality images of whole aorta, pulmonary artery and coronary artery can be acquired for emergency chest pain examination. The image quality of coronary is affected by high HR.
Key words:
Tomography; X-ray computed; Triple rule-out
Contributor Information
Jiayi Liu
Department of Medical Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
Zixu Yan
Department of Medical Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
Nan Zhang
Department of Medical Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
Yanchun Sun
Department of Medical Imaging, Beijing Huairou First Hospital, Beijing 101400, China
Dongting Liu
Department of Medical Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
Yu Li
Department of Medical Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
Zhaoying Wen
Department of Medical Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
Wei Yu
Department of Medical Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
Zhanming Fan
Department of Medical Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
