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Evaluation of Prospective Living Renal Donors for Laparoscopic Nephrectomy with Multisection CT: The Marriage of Minimally Invasive Imaging with Minimally Invasive Surgery¹

¹ From the Departments of Radiology (J.R., K.K.K., M.T., S.A.P.), Urology (A.L.S.), and Surgery (S.B.L., R.S.F.), Indiana University Hospital, 550 N University Blvd, Rm 0279, Indianapolis, IN 46202-5253. Recipient of a Certificate of Merit award for an education exhibit at the 2000 RSNA scientific assembly. Received February 2, 2001; revision requested March 6 and received April 20; accepted April 25. Address correspondence to J.R. (e-mail: jrydberg@iupui.edu).

Laparoscopic technique for excision of a kidney from a living donor has advantages over conventional open surgery, but operative visibility and surgical exposure are limited. Preoperative multisection computed tomography (CT) can provide necessary anatomic information in a minimally invasive procedure. A three-phase examination is suggested: (a) imaging from the top of the kidneys to the pubic symphysis with a section width of 2.5 mm and no contrast medium, (b) scanning of the kidneys and upper pelvis during the arterial phase of enhancement with a section width of 1.0 mm, and (c) scanning of the kidneys and upper retroperitoneum during the nephrographic phase of enhancement with a section width of 1.0 mm. Emphasis in this article is placed on analysis of the venous anatomy because most radiologists are unfamiliar with the anatomic variations. Conventional radiography of the abdomen and pelvis is performed after CT to evaluate the collecting system and ureters and to provide a lower total radiation dose than if CT were used. Of several postprocessing techniques that may be used, the authors prefer maximum intensity projection for arterial evaluation and multiplanar reformatting for venous evaluation.

Index Terms: Kidney, CT, 81.12119 • Kidney, transplantation, 81.455 • Renal arteries, CT, 961.12919 • Renal veins, CT, 966.12919

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