Zhang Li-ren, Xu Dong-sheng, Liu Xiao-cheng, Wu Xue-sheng, Ying Yuan-ning, Dong Zhi, Sun Feng-wei, Yang Pi-pi, Li Xu
Department of Radiology, TEDA International Cardiovascular Hospital, Tianjin 300457, China.
Zhonghua Xin Xue Guan Bing Za Zhi. 2011 Dec;39(12):1117-23.
To observe the coronary vessel lumen diameter and bifurcation angle in subjects with normal CT coronary angiography (CTCA) imaging.
64-row CT coronary angiography imaging from 526 adult people with excellent image quality and normal vascular image were analyzed in this study. The lumen diameter from the origin to distal with 2 mm lumen of left main coronary artery (LM), anterior descending branch (LAD), left circumflex branch (LCX) and right coronary artery (RCA) was measured at 1 cm interval in CPR image. The vascular tapered ratio was calculated. The bifurcation angle in the diagonal branch, obtuse marginal branch, posterior descending branch, acute marginal branch as well as the origin diameter was also measured in VR image.
The LAD average length was 13 cm and lumen diameter was 3.92 mm at origin and 2.10 mm at distal. The average decremented ratio of LAD was 7.7% (male 7.0%, female 8.4%). The maximal decremented ratio 8.0% - 10.0% occurred at 3 - 5 cm apart from the origin of LAD. The LCX average length was 13 cm and lumen diameter was 3.57 mm at origin and 2.10 mm at distal. The average decremented ratio of LCX was 9.7% (male 9.6%, female 9.7%). Lumen decremented ratio was less than 3.0% between origin and proximal 3 cm and 8.3% - 10.7% in the rest portion of the LCX. The RCA average length was 18 cm and lumen diameter was 3.97 mm at origin and 2.15 mm at distal. The average decremented ratio of RCA was 5.1% (male 4.9%, female 5.3%). The decremented ratio of RCR was less than 4.0% between origin and proximal 10 cm and 6.1% - 15.2% in the rest portion. The bifurcation angle was 50, 55, 66 and 76 degree for LAD with diagonal branch, LCX with obtuse marginal branch, RCA with posterior descending branch and RCA with obtuse marginal branch respectively.
Coronary artery length, lumen diameter and decremented ratio as well as bifurcation angel could be identified in 64 row CTCA image in vivo. This information could help us to understand the in vivo coronary artery anatomy.
观察CT冠状动脉造影（CTCA）成像正常的受试者的冠状动脉管腔直径及分叉角度。
本研究分析了526例图像质量优良且血管图像正常的成年人的64排CT冠状动脉造影成像。在CPR图像中，以1 cm间隔测量左主干冠状动脉（LM）、前降支（LAD）、左旋支（LCX）和右冠状动脉（RCA）从起始端到管腔直径为2 mm的远端的管腔直径。计算血管逐渐变细率。在VR图像中还测量了对角支、钝缘支、后降支、锐缘支的分叉角度以及起始直径。
LAD平均长度为13 cm，起始端管腔直径为3.92 mm，远端为2.10 mm。LAD的平均递减率为7.7%（男性7.0%，女性8.4%）。最大递减率8.0% - 10.0%出现在距LAD起始端3 - 5 cm处。LCX平均长度为13 cm，起始端管腔直径为3.57 mm，远端为2.10 mm。LCX的平均递减率为9.7%（男性9.6%，女性9.7%）。在起始端与近端3 cm之间管腔递减率小于3.0%，在LCX其余部分为8.3% - 10.7%。RCA平均长度为18 cm，起始端管腔直径为3.97 mm，远端为2.15 mm。RCA的平均递减率为5.1%（男性4.9%，女性5.3%）。RCR在起始端与近端10 cm之间递减率小于4.0%，在其余部分为6.1% - 15.2%。LAD与对角支、LCX与钝缘支、RCA与后降支、RCA与钝缘支的分叉角度分别为50度、55度、66度和76度。
在64排CTCA图像中可在体内识别冠状动脉长度、管腔直径、递减率以及分叉角度。这些信息有助于我们了解体内冠状动脉解剖结构。
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