title: [Preoperative assessment of renal vascular anatomy for donor nephrectomy: Is CT superior to MRI?].
abstract: BACKGROUND
  computed tomography angiography (CTA) and magnetic resonance angiography (MRA) are both used in the preoperative assessment of vascular anatomy before donor nephrectomy. Our objective was to determine retrospectively and to compare the sensitivity of CTA and MRA imaging in preoperative renal vascularisation in living kidney donors.
  
  
  METHODS
  between 1999 and 2007, 42 kidney donors were assessed in our center: 27 by MRA, 10 by CTA, and five by both techniques. Images were interpreted using multiplanar reconstructions. Results were compared retrospectively with peroperative findings; discordant cases were re-examined by an experienced radiologist. Numbers of vessels detected with imaging methods was compared with numbers actually found at the operating time.
  
  
  RESULTS
  MRA showed 35/43 arteries (Se 81.4 %) and 33/34 veins (Se 97.1 %), and CTA showed 18/18 arteries (Se 100 %) and 15/16 veins (Se 93.8 %). The presence of multiple arteries was detected in only one third of cases (3/9) on MRI scans; this difference was statistically significant. The missed arteries were not detected on second examination of the MRI scans with the knowledge of peroperative findings.
  
  
  CONCLUSIONS
  MRA is less sensitive than CTA for preoperative vascularisation imaging in living renal donors, especially in the detection of multiple renal arteries.
authors.affiliation: Service d'urologie et de transplantation rénale, CHU de Grenoble, BP 217, 38043 Grenoble cedex 9, France. aarvin-berod@chu-grenoble.fr
authors.forename: A
authors.initials: A
authors.lastname: Arvin-Berod
authors.forename: I
authors.initials: I
authors.lastname: Bricault
authors.forename: N
authors.initials: N
authors.lastname: Terrier
authors.forename: O
authors.initials: O
authors.lastname: Skowron
authors.forename: P
authors.initials: P
authors.lastname: Cadi
authors.forename: B
authors.initials: B
authors.lastname: Boillot
authors.forename: C
authors.initials: C
authors.lastname: Thuillier
authors.forename: C
authors.initials: C
authors.lastname: Cluze
authors.forename: J-L
authors.initials: JL
authors.lastname: Descotes
authors.forename: J-J
authors.initials: JJ
authors.lastname: Rambeaud
authors.forename: J-A
authors.initials: JA
authors.lastname: Long
mesh_terms: D006801:Humans; D007668:Kidney / Q000098:blood supply* / Q000000981:diagnostic imaging*; D016030:Kidney Transplantation / Q000379:methods; D019520:Living Donors; D018810:Magnetic Resonance Angiography; D009392:Nephrectomy / Q000379:methods; D018579:Patient Selection; D011237:Predictive Value of Tests; D011300:Preoperative Care; D012077:Renal Artery / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D012082:Renal Veins / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D012189:Retrospective Studies; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed