CAJ | 학술논문

目的采用CT能谱模式对周围动脉闭塞性疾病患者行下肢动脉造影检查，探讨宝石CT能谱提高下肢动脉造影图像质量的可行性。资料与方法前瞻性地连续选择临床拟诊为下肢动脉闭塞性疾病的48例患者，随机分为研究组和对照组。研究组24例采用CT能谱模式行下肢动脉造影，对照组24例采用多层螺旋CT模式行下肢动脉造影。对两组图像中的髂总动脉、腘动脉、胫前动脉及其分支进行测量，并计算对比噪声比，由2名影像诊断医师采用5分制独立评价两组图像质量。结果研究组患者髂总动脉、腘动脉、胫前动脉的CT值及对比噪声比均大于对照组（t=8.7、7.9、12.6、17.2, P<0.01），背景噪声小于对照组（t=1.5, P<0.01）。医师1、医师2对研究组和对照组图像质量评分分别为110分、90分和111分、93分，差异均有统计学意义（Z=－7.6、－8.0,P<0.01）。结论下肢动脉造影中使用CT能谱最佳千电子伏的单能量图像质量明显优于多层螺旋CT混合能量模式的图像质量。
목적채용CT능보모식대주위동맥폐새성질병환자행하지동맥조영검사，탐토보석CT능보제고하지동맥조영도상질량적가행성。자료여방법전첨성지련속선택림상의진위하지동맥폐새성질병적48례환자，수궤분위연구조화대조조。연구조24례채용CT능보모식행하지동맥조영，대조조24례채용다층라선CT모식행하지동맥조영。대량조도상중적가총동맥、객동맥、경전동맥급기분지진행측량，병계산대비조성비，유2명영상진단의사채용5분제독립평개량조도상질량。결과연구조환자가총동맥、객동맥、경전동맥적CT치급대비조성비균대우대조조（t=8.7、7.9、12.6、17.2, P<0.01），배경조성소우대조조（t=1.5, P<0.01）。의사1、의사2대연구조화대조조도상질량평분분별위110분、90분화111분、93분，차이균유통계학의의（Z=－7.6、－8.0,P<0.01）。결론하지동맥조영중사용CT능보최가천전자복적단능량도상질량명현우우다층라선CT혼합능량모식적도상질량。
Purpose To implement lower artery angiography in patients with peripheral arterial occlusive disease, and to investigate the feasibility of lower extremity gemstone spectral CT angiography in improving image quality.Materials and Methods Forty-eight patients suspected with lower extremity arterial occlusive diseases were randomly divided into research group and control group. Research group (24 cases) were carried out gemstone spectral CT angiography (CTA) scan and control group (24 cases) were scanned with multi-slice spiral CT (CTA). The CT value of the common iliac artery, popliteal artery and its branches was measured and contrast to noise ratio (CNR) were calculated in both groups. The images were evaluated independently by 2 senior physicians based on a 5-level evaluation standard.Results The CT value of common iliac artery, popliteal artery, anterior tibial artery and the CNR in research group were all higher than those in control group (t=8.7, 7.9, 12.6 and 17.2,P<0.01), but the background noise was lower than that in control group (t=1.5,P<0.01). The scores of two image quality accessed by physician 1 and 2 were 110:90 and 111:93 respectively with statistical difference (Z=-7.6 and-8.0, P<0.01).Conclusion The image obtained by gemstone spectral CT optimal single energy image technique is much better than that by conventional multi-slice spiral CT in lower extremity angiography.