title: Three-tesla MRI biphasic angiography: a method for preoperative assessment of the vascular supply in renal tumours: a surgical perspective.
abstract: OBJECTIVE
  The new generation of 3TMRI has improved spatial and time resolutions, which are favourable in imaging of the renal vasculature. In this study, we have compared the imaging findings of the renal blood vessels using 3TMRI and CT with intraoperative assessment of the renal vasculature as gold standard.
  
  
  METHODS
  This prospective study was approved by the local ethical committee. Between 4/2011 and 12/2011, 80 patients with renal tumours underwent 3TMRA (angiography) (Magnetom SKYRA 3T, Siemens). Twenty of the patients were also examined with CT AG. The results of the CTA- and MRA-imaging studies were correlated with the intraoperative assessment of the renal vessels.
  
  
  RESULTS
  Seventy patients (87.5 %) had a detailed intraoperative assessment of the renal vessels. The sensitivities for CTA and MRA were 88.2 and 88.6 %, respectively. All discrepancies between imaging studies and intraoperative findings were due to inability to identify small polar vessels. The results of MRA were concordant with CTA in 85.0 % of cases. The (three) discrepancies between MRI and CT were due to failure of MRI in identifying small polar vessels.
  
  
  CONCLUSIONS
  (1) 3TMRA gives detailed information about the renal vasculature including its topographical anatomy. (2) With MRI, small aberrant vessels are more frequently missed than with CTA. (3) CTA remains the gold standard. However, MRA may be used for planning of laparoscopic operations. (4) The quality of the 3D reconstruction is highly depending on the skills of the radiologist.
authors.affiliation: Department of Urology, Charles University Hospital, E. Beneše 13, 305 99, Plzeň, Czech Republic, horam@fnplzen.cz.
authors.forename: Milan
authors.initials: M
authors.lastname: Hora
authors.forename: Petr
authors.initials: P
authors.lastname: Stránský
authors.forename: Ivan
authors.initials: I
authors.lastname: Trávníček
authors.forename: Tomáš
authors.initials: T
authors.lastname: Urge
authors.forename: Viktor
authors.initials: V
authors.lastname: Eret
authors.forename: Boris
authors.initials: B
authors.lastname: Kreuzberg
authors.forename: Jan
authors.initials: J
authors.lastname: Baxa
authors.forename: Hynek
authors.initials: H
authors.lastname: Mírka
authors.forename: Fredrik
authors.initials: F
authors.lastname: Petersson
authors.forename: Ondřej
authors.initials: O
authors.lastname: Hes
authors.forename: Jiří
authors.initials: J
authors.lastname: Ferda
mesh_terms: D006801:Humans; D021621:Imaging, Three-Dimensional; D007668:Kidney / Q000098:blood supply / Q000000981:diagnostic imaging / Q000473:pathology; D007680:Kidney Neoplasms / Q000098:blood supply* / Q000473:pathology / Q000601:surgery*; D010535:Laparoscopy / Q000379:methods; D018810:Magnetic Resonance Angiography / Q000379:methods*; D009392:Nephrectomy / Q000379:methods; D011300:Preoperative Care / Q000379:methods*; D011446:Prospective Studies; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed