Impact of respiratory motion artifact on coronary image quality of one beat coronary CT angiography

被引:3
|
作者
Shen, Wenting [1 ,2 ]
Chen, Yang [1 ]
Qian, Wen [1 ]
Liu, Wangyan [1 ]
Zhu, Yinsu [1 ]
Xu, Yi [1 ]
Zhu, Xiaomei [1 ]
机构
[1] Nanjing Med Univ, Dept Radiol, Affiliated Hosp 1, Guangzhou Rd, Nanjing, Jiangsu, Peoples R China
[2] Liyang Peoples Hosp, Dept Radiol, Jianshe West Rd, Liyang, Jiangsu, Peoples R China
关键词
Motion artifacts; computed tomography angiography; coronary angiography; breath holding; FRACTIONAL FLOW RESERVE; CORRECTION ALGORITHM; ITERATIVE RECONSTRUCTION; PULMONARY ANGIOGRAPHY; COMPUTED-TOMOGRAPHY; DIAGNOSTIC-ACCURACY;
D O I
10.3233/XST-200812
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
BACKGROUND: Accuracy of CT-derived fractional flow reserve depends on good image quality. Thus, improving image quality during coronary CT angiography (CCTA) is important. OBJECTIVE: To investigate impact of respiratory motion artifact on coronary image quality focusing on vessel diameter and territory during one beat CCTA by a 256-row detector. METHODS: We retrospectively reviewed patients who underwent CCTA under free-breathing (n = 100) and breath-holding (n = 100), respectively. Coronary image quality is defined as 4-1 from excellent to poor (non-diagnostic) and respiratory motion artifact severity is also scored on a 4-point scale from no artifact to severe artifact. Coronary image quality and respiratory motion artifact severity of all images were evaluated by two radiologists independently. RESULTS: Compared with free-breathing group, the image qualities are significantly higher in per-segment, per-vessel and per-patient levels (P < 0.001) and proportion of segments with excellent image quality also improves significantly (73.6% vs 60.1%, P < 0.001) in breath-holding group. The image quality improvement occurs in medium-sized coronary arterial segments. Coronary image quality improves with respiratory motion artifacts decreasing in both groups, respectively. CONCLUSION: During one heartbeat CCTA, breath-holding is still recommended to improve coronary image quality due to improvement of the image quality in the medium-sized coronary arteries.
引用
收藏
页码:287 / 296
页数:10
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