Combined prospectively electrocardiography- and respiratory-triggered sequential cardiac computed tomography in free-breathing children: success rate and image quality

被引:17
作者
Goo, Hyun Woo [1 ,2 ]
机构
[1] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Radiol, 88,Olymp Ro 43 Gil, Seoul 05505, South Korea
[2] Univ Ulsan, Coll Med, Asan Med Ctr, Res Inst Radiol, 88,Olymp Ro 43 Gil, Seoul 05505, South Korea
关键词
Cardiac computed tomography; Children; Electrocardiography triggering; Image quality; Respiratory triggering; CONGENITAL HEART-DISEASE; TUBE CURRENT MODULATION; INITIAL-EXPERIENCE; CT ANGIOGRAPHY; CHEST CT; ANATOMY; PITCH; RECONSTRUCTION; INFANTS; NOISE;
D O I
10.1007/s00247-018-4114-z
中图分类号
R72 [儿科学];
学科分类号
100202 ;
摘要
Background Combined prospectively electrocardiography (ECG)- and respiratory-triggered sequential cardiac computed tomography (CT) has not been evaluated in free-breathing children. Objective To evaluate the success rate and image quality of combined prospectively ECG- and respiratory-triggered sequential cardiac CT in free-breathing children. Materials and methods Image quality of combined prospectively ECG- and respiratory-triggered sequential cardiac CT in 870 children (<= 5 years of age) was evaluated in terms of severe motion (maximal distance >= 2 mm) and band artifacts (maximal attenuation difference >= 100 Hounsfield units). The success rate of the scan mode was calculated. The causes of failed cases were assessed. Patient-related, radiation and image quality parameters were compared between success and failure groups. Results Severe motion artifacts were observed in 10.6% (92/870) of patients due to cardiac phase error in 17 (18.5%), patient motion in 12 (13.0%), and unknown causes in 63 (68.5%). Severe band artifacts were seen in 13.2% (115/870) of patients. Combined prospectively ECG- and respiratory-triggered sequential cardiac CT was successfully performed in 78.5% (683/870) of patients, while it failed in 21.5% (187/870). All the evaluated patient-related, radiation and image quality parameters were significantly different (P <= 0.001) between success and failure groups except effective dose (P > 0.05). Conclusion Additional prospective respiratory triggering can reduce motion artifacts in prospectively ECG-triggered sequential cardiac CT in free-breathing children.
引用
收藏
页码:923 / 931
页数:9
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