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Potential renal donors: comparison of conventional imaging with helical CT
J F Platt1, J H Ellis, M Korobkin
1Department of Radiology, University of Michigan Hospital, Ann Arbor 48109-0030, USA.
Insights
Helical computed tomography (CT) can replace intravenous urography and renal angiography for evaluating living kidney donors. This imaging technique accurately assesses renal anatomy and anomalies, improving donor selection.
Area of Science:
- Radiology
- Nephrology
- Surgical Assessment
Background:
- Living kidney donation requires precise anatomical evaluation to ensure donor safety and graft success.
- Traditional imaging modalities like intravenous urography and renal angiography have limitations in fully assessing renal vasculature and non-vascular structures.
Purpose of the Study:
- To evaluate helical computed tomography (CT) as a potential alternative to conventional imaging for living potential renal donors.
- To compare the diagnostic accuracy of helical CT with intravenous urography and renal angiography in identifying renal anatomy and anomalies.
Main Methods:
- Helical CT scans were performed on 32 potential renal donors before and after contrast administration.
- Three-dimensional reconstructions were generated from 1.5-mm interval scans.
- Helical CT images were compared blindly with urograms (n=32) and renal angiograms (n=24).
Main Results:
- Helical CT identified all early-dividing main renal arteries, comparable to angiography.
- Helical CT depicted three renal venous anomalies missed by angiography.
- Both helical CT and urography equally identified non-vascular findings, though one small accessory artery was missed by helical CT.
Conclusions:
- Renal helical CT is a suitable replacement for intravenous urography and angiography in the pre-transplant evaluation of living renal donors.
- Helical CT offers comprehensive assessment of both vascular and non-vascular renal structures, enhancing donor evaluation.
Purpose:
To assess helical computed tomography (CT) as a potential substitute for intravenous urography and renal angiography in the evaluation of living potential renal donors.
Materials And Methods:
Helical CT was performed in 32 potential donors both before and after administration of contrast material. Scans were reconstructed at 1.5-mm intervals for three-dimensional reconstructions. Helical CT images were blindly compared with urograms (n = 32) and renal angiograms (n = 24).
Results:
One small accessory artery was not depicted with helical CT, and angiography did not depict an accessory artery arising in proximity to the origin of the main renal artery. All eight kidneys with early dividing main arteries were identified with both helical CT and angiography. Three renal venous anomalies were depicted only with helical CT. Helical CT and urography equally depicted nonvascular findings.
Conclusion:
Renal helical CT is a suitable replacement for intravenous urography and angiography in the assessment of living renal donors.