Role of Magnetic Resonance Angiography in Evaluation of Potential Living Kidney Donors
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resonance angiography (MRA) in identifying the number of renal arteries, assessment of the renovascular anatomy and diagnosing the major renovascular abnormalities in comparison with intra arterial digital subtraction angiography (IA-DSA) in potential renal transplant donors. Patients and methods: Thirty five potential donors underwent MR imaging at 1.5 T equipment utilizing contrast- enhanced 3-D-TOF technique with MIP images as a post processing. 25 donors utilized MIP and MPR images as combined post processing techniques. All the 35 donors were subjected to IA-DSA for abdominal aorta and selective IA-DSA of renal arteries. The results of MRA and IADSA were correlated with the operative findings. Results: Both studies showed all 24 single renal arteries, MR angiograms showed 8 of 10 accessory arteries while 1A-DS aortograms showed 7 and IA-selective renal angiograms showed 9 accessories. None of these techniques showed triple renal arteries. MPR images showed all the 19 single arteries detected intra-operatively while MIP images detected only IS. MPR showed 5 accessory renal arteries of 6 accessories intra-operatively while MIP images showed only 4 accessories. MR angiograms, IADS aonograms and IA selective renal angiograms showed 3,13 double renal veins, 212, circum-aortic left renal veins and 4,2,3 retroaonic left renal veins respectively. Conclusion: MRA has a potential for replacing 1A-DS aonography and holds a promise as a single examination for anatomical assessment of potential living kidney donors. The combination of MU' and MPR images as a post processing technique for contrast-enhanced abdominal MRA permits better anatomical assessment and detection of signals in adjacent structures that corrupt the image quality as seen on MIP images alone. Key Words: MRA - Kidney.