摘要
目的探讨螺旋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，以峰值时间加２秒定为最佳延迟扫描时间。ＳＣＴＡ以３．５ｍｌ／ｓ速度经肘前静脉注入碘造影剂９０～１１０ｍｌ，由头侧向足侧扫描。扫描参数为螺距１．０，层厚３．２ｍｍ。全部行最大强度投影（ｍａｘｉｍｕｍｉｎｔｅｎｓｉｔｙｐｒｏｊｅｃｔｉｏｎ，ＭａｘＩＰ）成像；２３例行遮盖表面显示（ｓｈａｄｅｄｓｕｒｆａｃｅｄｉｓｐｌａｙ，ＳＳＤ）成像。结果腹腔动脉、脾动脉、肝总动脉、肝固有动脉及肠系膜上动脉干ＭａｘＩＰ与ＳＳＤ的显示率均为１００％；胃十二指肠动脉ＭａｘＩＰ与ＳＳＤ的显示率分别为１００％及９１％；胃左动脉ＭａｘＩＰ与ＳＳＤ的显示率分别为８３％及８７％。结论ＳＣＴＡ作为微创性检查，是评价腹腔动脉及其分支与肠系膜上动脉干病变和变异的重要的诊断与筛选方法。
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.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
1999年第5期335-337,共3页
Chinese Journal of Radiology
关键词
腹腔动脉
肠系膜上动脉
CT
血管造影术
Celiac arteryMesenteric artery, superiorTomography,Xray computed Angiography
