Imaging quality and influence factors of 64-slice spiral CT renal artery angiography
- VernacularTitle:64排螺旋CT肾动脉成像效果及其影响因素
- Author:
Wei LI
;
Jinrong LI
;
Yong LAN
;
Maoqing HU
;
Xuemao LUO
;
Wansheng LONG
- Publication Type:Journal Article
- Keywords:
Tomography,X-ray computed;
Renal artery;
Artery stenosis
- From:Chinese Journal of Medical Imaging Technology
2010;26(1):153-156
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess influence factors of imaging quality with 64-slice spiral CT angiography (CTA) of renal artery. Methods A total of 305 hypertension patients underwent CTA of renal artery, and 108 of them were examined with DSA. The imaging quality was classified as Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ, and the degree of stenosis wass classified as <50%, 50%-74%, 75%-99% and occlusion. The sensitivity and specificity of CTA of renal artery was analyzed taking DSA as the standard. Results The influence factors of CTA of renal artery included the delayed time set, rotation time, the units dose of contrast medium and the speed of injection, breath-holding, the patients age and vascular calcification. The sensitivity and specificity of CTA of arterial stenosis <50%, 50%-74%, 75%-99%, occlusion was 76.30% and 76.80%, 89.70% and 90.40%, 96.30% and 97.10%, 100% and 100%, respectively. Conclusion The influence factors of CTA of renal artery are the delayed time set, rotation time, the units dose of contrast medium and the speed of injection, breath-holding, the patients age and vascular calcification. CTA of renal artery can meet the clinical requirements in assessing the renal arterial stenosis.
