CAJ | 학술논문

目的讨论多层螺旋CT直接下肢静脉造影增强扫描的对比剂注射方式、浓度和延迟时间,寻求较为理想的CT直接下肢静脉造影方案.方法选择下肢静脉疾病患者32例,采用不同对比剂浓度与不同注射速率进行CT直接下肢静脉造影检查,并对图像对比分析,22例与X线下肢静脉造影进行分节段静脉显示能力对比分析.结果血流相关性伪影为影响CT下肢静脉造影图像质量的主要因素,注射速率1.5 ml/s和2.5 ml/s组的图像评级差异有统计学意义(χ~2=5.495,P=0.019),稀释浓度为25%与15%的图像评级差异无统计学意义(χ~2=3.333,P=0.068).CT下肢静脉造影与X线下肢静脉造影在胫前静脉、胫后静脉、腘静脉与股静脉显示能力相同(χ~2=2.095,P=0.148),CT下肢静脉造影显示髂静脉的能力优于X线下肢静脉造影(χ~2=8.324,P=0.004).结论 CT下肢静脉造影髂静脉优于X线下肢静脉造影;采用延迟50 s经足背静脉以2.5 ml/s速度注射45 mgI/ml浓度(非离子型300 mgI/ml对比剂稀释15%)可获得较满意的诊断图像.
목적 토론다층라선CT직접하지정맥조영증강소묘적대비제주사방식、농도화연지시간,심구교위이상적CT직접하지정맥조영방안.방법 선택하지정맥질병환자32례,채용불동대비제농도여불동주사속솔진행CT직접하지정맥조영검사,병대도상대비분석,22례여X선하지정맥조영진행분절단정맥현시능력대비분석.결과 혈류상관성위영위영향CT하지정맥조영도상질량적주요인소,주사속솔1.5 ml/s화2.5 ml/s조적도상평급차이유통계학의의(χ~2=5.495,P=0.019),희석농도위25%여15%적도상평급차이무통계학의의(χ~2=3.333,P=0.068).CT하지정맥조영여X선하지정맥조영재경전정맥、경후정맥、객정맥여고정맥현시능력상동(χ~2=2.095,P=0.148),CT하지정맥조영현시가정맥적능력우우X선하지정맥조영(χ~2=8.324,P=0.004).결론 CT하지정맥조영가정맥우우X선하지정맥조영;채용연지50 s경족배정맥이2.5 ml/s속도주사45 mgI/ml농도(비리자형300 mgI/ml대비제희석15%)가획득교만의적진단도상.
Objective To discuss the injective method, contrast agent concentration and delay time of MSCT direct venography in lower extremity vein, in order to make optimal venographic schedule. Methods Thirty-two patients with lower extremity vein diseases underwent MSCT direct venography in using different concentration and injective rate of contrast agent, and the images were analyzed. The displaying ability of MSCT direct venography in lower extremity vein segment was compared with that of X-ray venography in 22 patients. Results Blood flow correlation constructed defect was the main factor impacting image quality of CT venography in lower extremity. The image scores between the groups of injective rate 1.5 ml/s and the group of 2.5 ml/s were statistically different (χ~2=5.495, P=0.019), whereas no difference of image score was found between the group of concentration of 25% and 15% (χ~2=3.333, P=0.068). The displaying ability of CT and X-ray venography in anterior tibial vein, posterior tibial vein, popliteal vein and femoral vein was not statistically different (χ~2=2.095, P=0.148). For iliac vein, the displaying ability of CT outstripped that of X-ray venography (χ~2=8.324, P=0.004). Conclusion With the schedule of delay time 50 s, injective rate 2.5 ml/s and concentration 45 mgI/ml (nonionic 300 mgI/ml and diluted 15%), MSCT direct venography in lower extremity can acquire satisfactory image, and its displaying ability of iliac vein is better than that of X-ray venography.