Sigmund G, Stöver B, Zimmerhackl L B, Frankenschmidt A, Nitzsche E, Leititis J U
Abteilung Röntgendiagnostik, Chirurgische Universitätsklinik Freiburg.
Rofo. 1991 May;154(5):535-40. doi: 10.1055/s-2008-1033180.
RARE-MR urography (so called "water-pictures") is a fast MR imaging technique that selectively depicts fluid without contrast application. Acquisition time is 6.4 s per slice with 1 excitation, or 23 s per slice with 2 averages respectively. From Sept. 1989 to April 1990 24 children with anomalies of the urinary tract have been examined each by RARE MR urography and one T1-weighted spin-echo sequence. Independent of excretory function, the technique can show dilated calices and renal pelvis, pelviureteric obstruction, renal duplication, and megaureter. However, it cannot distinguish between vesicoureteric reflux and obstructive megaureter. Our first results suggest that RARE MR urography combined with ultrasound, reflux cystography and isotope nephrography, can replace excretory urography in certain circumstances--or at least postpone it to the preoperative phase.
快速采集重T2加权磁共振尿路造影（所谓的“水成像”）是一种快速磁共振成像技术，无需注射造影剂即可选择性地显示液体。每一层面采集时间在单次激发时为6.4秒，两次平均采集时则为每层23秒。从1989年9月至1990年4月，对24例尿路异常的儿童分别采用快速采集重T2加权磁共振尿路造影和一种T1加权自旋回波序列进行了检查。该技术不受排泄功能的影响，能够显示肾盂肾盏扩张、肾盂输尿管梗阻、重复肾和巨输尿管。然而，它无法区分膀胱输尿管反流和梗阻性巨输尿管。我们的初步结果表明，快速采集重T2加权磁共振尿路造影联合超声、反流膀胱造影和同位素肾造影，在某些情况下可以替代排泄性尿路造影——或者至少将其推迟到术前阶段。
