腹腔动脉与肠系膜上动脉的螺旋CT血管造影初探

探讨螺旋ＣＴ血管造影（ｓｐｉｒａｌｃｏｍｐｕｔｅｄｔｏｍｏｇｒａｐｈｙａｎｇｉｏｇｒａｐｈｙ，ＳＣＴＡ）对腹腔动脉及其分支与肠系膜上动脉干的显示能力及扫描技术。方法腹部ＳＣＴＡ检查结果正常者３０例，平扫后行小剂量试验。取胰体水平腹主动脉为靶血管，以峰值时间为２秒定为最佳延迟扫描时间。ＳＣＴＡ以３．５ｍｌ／ｓ速度经肘前脉注入碘造影剂９０－１１０ｍｌ，由于侧向足侧扫描，扫描参数为螺距１．０层厚３．２ｎ

Spiral CT angiography(SCTA) study of celiac artery and superior mesenteric artery YUAN Zhenguo, ZHOU Cunsheng, XU Zhuodong, et al. Shand

Objective To study the visualization capability and scaning technique of SCTA in celiac artery, superior mesenteric artery(SMA) and other branches. Methods Thirty patients, with normal abdominal SCTA results, were given small injection test dose after plain scan. The abdominal aorta parallel to the body of pancreas was chosen as target vessel, the peaktime plus 2 seconds as the best delay scan time. Iodine contrast medium 90110 ml was injected into antecubital vein at the speed of 3.5 ml/s, then scan from cranial to caudal was performed. Pitch 1.0 and slice thickness 3.2 mm were selected as the scan parameters. Maximum intensity projection(MaxIP) was employed in all patients and shaded surface display(SSD) in 23 cases. Results The display rate using MaxIP and SSD of celiac artery, splenic artery, common hepatic artery, proper hepatic artery and SMA were all 100%, the gastroduodenal artery 100% and 91%, the left gastric artery 83% and 87%, respectively. Conclusions SCTA as a minimally invasive examination is a valuable method to detect and diagnose diseases or variations of celiac artery, its branches and SMA.Spiral scaning technique and image processing have a decisive effect on the image quality.