title: [Initial experiences with contrast enhanced MR angiography after kidney and pancreas transplantation].
abstract: OBJECTIVE
  The assessment of vascular complications by DSA in patients who have undergone kidney and pancreas transplantation is an invasive investigation and has the risk of nephrotoxicity caused by the iodinated contrast agent. The aim of this study was to compare the diagnostic value of noninvasive gadolinium--enhanced MRA with intraoperative and DSA results.
  
  
  METHODS
  Eleven MRA investigations were performed in eight patients after kidney and pancreas transplantation. A fast T1-weighted 3D-gradient-echo sequence with short TR and TE was used in a dynamic technique including the three consecutive data acquisitions after a Gd-DTPA (Magnevist) injection. MRA was compared with intraoperative findings in all patients and with DSA in three patients.
  
  
  RESULTS
  In the distal abdominal aorta, the internal and external iliac arteries, the main transplanted arterial vessels, and the arteries after first branching, high signal intensity was found. Assessment of renal and pancreatic parenchyma perfusion was possible in all patients. Venous transplant vessels could be depicted in four patients.
  
  
  CONCLUSIONS
  Our initial experience with the MRA sequence used shows that this technique may be promising in the assessment of larger arterial transplanted vessels and kidney/pancreas parenchyma perfusion. Improvement of the MRA technique is necessary for transplanted venous vessels.
authors.affiliation: Institut für Radiologische Diagnostik, Ludwig-Maximilians-Universität München, Klinikum Grosshadern.
authors.forename: A
authors.initials: A
authors.lastname: Huber
authors.forename: N
authors.initials: N
authors.lastname: Holzknecht
authors.forename: A
authors.initials: A
authors.lastname: Heuck
authors.forename: M
authors.initials: M
authors.lastname: Stangl
authors.forename: M
authors.initials: M
authors.lastname: Reiser
mesh_terms: D015901:Angiography, Digital Subtraction; D003287:Contrast Media; D019786:Gadolinium DTPA; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007668:Kidney / Q000098:blood supply; D016030:Kidney Transplantation / Q000502:physiology*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D009942:Organometallic Compounds; D010179:Pancreas / Q000098:blood supply; D016035:Pancreas Transplantation / Q000502:physiology*; D004369:Pentetic Acid / Q000031:analogs & derivatives*; D011183:Postoperative Complications / Q000175:diagnosis* / Q000209:etiology; D012039:Regional Blood Flow / Q000502:physiology; D012680:Sensitivity and Specificity
chemical_list: D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D019786:Gadolinium DTPA