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Genitourinary Imaging |
1 From the Departments of Radiology (E.J.H., D.G.M., R.J.W., E.K.O.) and Surgery (M.J.M., G.A.W.), Thomas Jefferson University Hospital, 132 S 10th St, Philadelphia, PA 19107-5244. From the 1999 RSNA scientific assembly. Received August 24, 1999; revision requested October 5; revision received October 25; accepted November 2. Address correspondence to E.J.H. (e-mail: Ethan.Halpern@mail.tju.edu).
PURPOSE: To compare computed tomographic (CT) angiography and magnetic resonance (MR) angiography for preoperative evaluation of living renal donors.
MATERIALS AND METHODS: Thirty-five living renal donors underwent preoperative contrast material–enhanced CT angiography and gadolinium-enhanced MR angiography. Each study was interpreted by two independent radiologists blinded to all other studies and to interpretations provided by other reviewers. Eighteen kidneys had surgical correlation.
RESULTS: CT demonstrated 33 supernumerary arteries in 19 patients, bilateral solitary arteries in 16 patients, and 18 proximal arterial branches in 16 patients. MR demonstrated 26 supernumerary arteries in 15 patients, bilateral solitary renal arteries in 20 patients, and 21 proximal arterial branches in 16 patients. Interobserver agreements for MR (
= 0.74) and CT ( = 0.73) were similar to the agreement between MR and CT ( = 0.74). Among the kidneys chosen for nephrectomy, one small accessory artery and one proximal arterial branch were missed with CT and MR. Two of the accessory arteries suggested at CT were not found at nephrectomy. By averaging data for both modalities, supernumerary arteries were present in 49% of kidney donors and were bilateral in approximately 17%. Proximal arterial branches were present in 46% of kidney donors.
CONCLUSION: Preoperative CT and MR angiography of the renal arteries in renal donors demonstrate substantial agreement. Interobserver disagreement in the interpretation of CT and MR angiograms is related to 1–2-mm-diameter vessels.
Index terms: Computed tomography (CT), angiography, 81.12116 • Kidney, blood supply, 961.13 • Kidney, transplantation, 81.4551 • Magnetic resonance (MR), vascular studies, 81.12142 • Renal arteries, CT, 961.12916 • Renal arteries, MR, 961.12942
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