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. |
