EVALUATION OF THE RENAL-ARTERIES IN KIDNEY DONORS - VALUE OF 3-DIMENSIONAL PHASE-CONTRAST MR-ANGIOGRAPHY WITH MAXIMUM-INTENSITY-PROJECTION OR SURFACE RENDERING

被引:61
作者
MEYERS, SP
TALAGALA, SL
TOTTERMAN, S
AZODO, MVU
KWOK, E
SHAPIRO, L
SHAPIRO, R
PABICO, RC
APPLEGATE, GR
机构
[1] UNIV PITTSBURGH,PITTSBURGH NMR INST,DEPT RADIOL,PITTSBURGH,PA 15213
[2] UNIV PITTSBURGH,DEPT SURG,PITTSBURGH,PA 15213
[3] UNIV ROCHESTER,MED CTR,DEPT NEPHROL,ROCHESTER,NY 14642
关键词
D O I
10.2214/ajr.164.1.7998523
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
OBJECTIVE. Donors routinely undergo preoperative conventional arteriography to evaluate the renal arteries before nephrectomy. The purpose of this study was to assess the capability of three-dimensional phase-contrast MR angiograms postprocessed with maximum-intensity-projection and surface-rendering techniques to show the renal arteries of potential donors. MATERIALS AND METHODS. Postprocessed three-dimensional phase-contrast MR angiograms of 17 patients were retrospectively reviewed by two experienced radiologists for the number and length of renal arteries visualized. Conventional arteriograms were used as the reference standard. Coronal maximum-intensity-projection and surface-rendered MR angiograms were also compared with each other with regard to the delineation of renal arteries from overlapping vessels. RESULTS. MR angiograms showed all 34 single or dominant renal arteries but only eight of in accessory arteries seen on conventional arteriograms. One of the nonvisualized accessory arteries was located within the imaged volume, and the other one arose from the distal aorta beyond the imaged regions. Five of six arterial branches arising from the proximal 30-mm portions of the renal arteries were seen on MR angiograms. Postprocessing with either maximum-intensity projection or surface-rendering showed the same number of renal arteries, although surface rendering separated overlapping veins from the renal arteries better than the maximum-intensity-projection technique. CONCLUSION. These results suggest that three dimensional MR angiography is a reliable method of imaging single or dominant renal arteries, but not for showing all accessory renal arteries and small arterial branches. Surface rendering may provide specific advantages over maximum-intensity-projection in delineating renal arteries from overlapping vessels.
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页码:117 / 121
页数:5
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