title: Intravenous digital subtraction angiography and helical computed tomography in evaluation of living renal donors.
abstract: OBJECTIVE
  The present study was carried out to evaluate the accuracy of helical computed tomography (CT) and intravenous digital subtraction angiography (IV-DSA) on anatomical assessment of renal vasculature for living renal donors.
  
  
  METHODS
  Forty-two healthy potential renal donors were prospectively evaluated and 35 subsequently underwent donor nephrectomy after helical CT and IV-DSA evaluation. The vascular and non-vascular findings were compared between the findings on helical CT, IV-DSA and surgery.
  
  
  RESULTS
  Ten prehilar branches and five accessory renal arteries were found at nephrectomy. Overall, operative findings agreed with the findings by IV-DSA in 89% and by helical CT in 83%. In delineating accessory arteries, IV-DSA had a sensitivity of 60% and specificity of 97%, whereas helical CT had a sensitivity of 40% and specificity of 100%. In delineating prehilar branches, IV-DSA had a sensitivity of 90% and specificity of 100%, whereas helical CT had a sensitivity of 70% and specificity of 100%. Accessory arteries and prehilar branches that were not detected by helical CT or IV-DSA, were less than 2 mm in diameter and did not require vascular reconstruction. Renal veins were delineated in 63% by IV-DSA, whereas they were clearly imaged by helical CT in all cases, including a case with a circumaortic renal vein. Non-vascular findings were obtained in 64% by helical CT, including two renal tumors. None of these findings were obtained by IV-DSA.
  
  
  CONCLUSIONS
  Helical CT and IV-DSA provide comparably sufficient information on renal artery vasculature. However, helical CT provides significantly more information on venous and non-vascular findings as a single-imaging modality.
authors.affiliation: Department of Urology, Hokkaido University School of Medicine, Sapporo City General Hospital, Sapporo, Japan. wataarai@med.hokudai.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Watarai
authors.forename: K
authors.initials: K
authors.lastname: Kubo
authors.forename: T
authors.initials: T
authors.lastname: Hirano
authors.forename: M
authors.initials: M
authors.lastname: Togashi
authors.forename: N
authors.initials: N
authors.lastname: Ohashi
authors.forename: T
authors.initials: T
authors.lastname: Usuki
authors.forename: I
authors.initials: I
authors.lastname: Takeuchi
authors.forename: K
authors.initials: K
authors.lastname: Nonomura
authors.forename: T
authors.initials: T
authors.lastname: Koyanagi
mesh_terms: D000328:Adult; D000368:Aged; D015901:Angiography, Digital Subtraction; D003287:Contrast Media / Q000008:administration & dosage; D005260:Female; D006801:Humans; D007275:Injections, Intravenous; D007668:Kidney / Q000098:blood supply; D016030:Kidney Transplantation / Q000000981:diagnostic imaging*; D019520:Living Donors; D008297:Male; D008875:Middle Aged; D012077:Renal Artery / Q000000981:diagnostic imaging*; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods
chemical_list: D003287:Contrast Media