| 李伟,李锦蓉,兰勇,胡茂清,罗学毛,龙晚生.64排螺旋CT肾动脉成像效果及其影响因素[J].中国医学影像技术,2010,26(1):153~156 |
| 64排螺旋CT肾动脉成像效果及其影响因素 |
| Imaging quality and influence factors of 64-slice spiral CT renal artery angiography |
| 投稿时间：2009-05-06 修订日期：2009-08-02 |
| DOI： |
| 中文关键词: 体层摄影术,X线计算机 肾动脉 动脉狭窄 |
| 英文关键词:Tomography, X-ray computed Renal artery Artery stenosis |
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| 中文摘要: |
| 目的 探讨64排螺旋CT肾动脉成像的影响因素和在评估肾动脉狭窄中的价值。方法 对305例高血压患者行肾动脉CT血管造影(CTA)检查,对其中108例行数字减影血管造影(DSA)检查。图像质量分为Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ共5个等级,狭窄程度分为<50%、50%~74%、75%~99%和闭塞4个级别。以DSA为标准,分析肾动脉CTA在评估动脉狭窄的灵敏度和特异性。结果 影响肾动脉CTA的因素有延迟时间、旋转时间、对比剂单位剂量与注射速度、屏气合作与否、患者年龄、血管钙化等;评估动脉狭窄<50%、50%~74%、75%~99%、闭塞的灵敏度和特异性分别为76.30%和76.80%、89.70%和90.40%、96.30%和97.10%、100%和100%。结论 延迟时间、旋转时间、对比剂单位剂量与注射速度、患者屏气合作与否、患者年龄、血管钙化等可影响肾动脉CTA的图像质量。在评估动脉狭窄方面,肾动脉CTA能满足临床诊断需求。 |
| 英文摘要: |
| 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. |
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