磁共振三维血流成像在小儿腹部疾病诊断中的价值

目的：探讨对比剂增强自动触发磁共振三维血流成像(3D CE MRA)技术在小儿腹部疾病诊断中的价值。方法：2001年3月～2003年6月对临床拟诊腹部实体肿瘤和腹腔大血管病变的46例患儿行常规MRI扫描和3D CEMRA检查，年龄生后1天～14岁，平均4．8岁。腹部实体肿瘤40例，腹腔大血管病变6例。全部患者检查前行肘静脉穿刺并保留静脉通道．镇静睡眠后注射2～3倍剂量非离子型对比剂。扫描采用Smart Prep Angio。对比剂智能捕捉技术。结果：本组检查成功率97．83％。40例实体肿瘤中,3D CEMRA显示肿瘤起源2例，肿瘤侵犯和包绕腹主动脉11例，下腔静脉闭塞3例，肾动静脉受侵蚀闭塞6例，肾蒂受肿瘤牵拉变细3例，腹腔动脉干、肠系膜上动静脉及睥静脉移位共12例，门静脉及其左右肝内分支受侵犯3例。腹部大血管病变6例。结论：3D CEMRA技术对巨大腹膜后肿瘤的起源定位具有诊断价值。结合多方位的断面图像不仅可以了解腹腔重要大血管被肿瘤浸润包裹和推挤移位情况，而且可对肾脏受浸润破坏情况进行术前评估，从而为临床制定恰当的治疗方案提供比较可靠的影像学依据。3D CEMRA是无创显示体腔大血管病变的有效方法。

Evaluation of three-dimensional enhancement MR angiography in pediatric abdominal disease

Objective:To evaluate the utility of three dimensional enhancement MR angiography in diagnosis of pediatric abdominal disease.Methods:From march 2001 to Jun 2003 forty six patients aged one day post partum to 14 year (mean 4.8 years) with retroperitoneal tumor and abdominal vascular were examined by conventional MRI and 3D CE MRA.There were abdominal tumor 40 cases and blood vessel disease 6 cases.Injection of double dose Gd DTPA through a peripheral vein was performed.Results:Success rate was 97.83%.3D CE MRA displayed the origin of retroperitoneal tumor in 2 cases,encasement of abdominal aorta 11 cases,inferior vena cava occlusion 3 cases,displacement of celiac trunk, superior mesenteric and splenic artery 12 cases,portal vein involvement 3 cases,abdominal vascular diseases 6 cases.Conclusion:3D CE MRA can clearly display the origin of large retroperitoneal tumor,involvement of the abdominal aorta and the branches,and involvement of renal artery and veins.It is also a non invasive method to demonstrate the abdominal vascular discase.