title: Prospective comparison of MRA with catheter angiography in the assessment of patients with aortoiliac occlusion before surgery or endovascular therapy.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the usefulness of gadolinium enhanced 3D magnetic resonance (MR) angiography (CE MRA) as an alternative to translumbar or brachial angiography in the pre-operative work-up of patients with aortoiliac occlusion.
  
  
  METHODS
  Nineteen patients (14 men and five women; age range 45-77 years; mean 62 years), not suitable for perfemoral angiography (aortoiliac occlusion, n = 18; infected femoro-femoral graft with femoral artery pseudoaneurysm, n = 1), underwent pre-operative CE MRA and catheter angiography (translumbar, n = 5; brachial, n = 14). CE MRA was performed using a 3D fast spoiled gradient-recalled pulse sequence during the intravenous injection of 40 ml of gadolinium DTPA and a 32-s breath-hold. All patients subsequently underwent surgical (n = 13) or percutaneous transluminal (n = 6) treatment for their vascular disease. The accuracy of CE MRA was determined compared with the findings at catheter angiography taken as the gold standard.
  
  
  RESULTS
  CE MRA gave accurate information about the occlusion, inflow and distal run-off in the majority of patients. CE MRA revealed occlusions with an accuracy of 94.7% in the aortic segment, 98.7% in the iliac segment, and 100% in the common femoral segment. The arterial segments distal to the common femoral artery were not completely visualized in four patients but CE MRA provided sufficient information to plan either surgical or percutaneous transluminal therapy in all but one patient.
  
  
  CONCLUSIONS
  CE MRA is highly accurate in showing the presence and extent of aortoiliac occlusions. In our study group, CE MRA gave sufficient information in the pre-operative evaluation of aortoiliac occlusion.
authors.affiliation: Department of Radiology, Beaumont Hospital, Dublin, Ireland.
authors.forename: W C
authors.initials: WC
authors.lastname: Torreggiani
authors.forename: J
authors.initials: J
authors.lastname: Varghese
authors.forename: P
authors.initials: P
authors.lastname: Haslam
authors.forename: F
authors.initials: F
authors.lastname: McGrath
authors.forename: P L
authors.initials: PL
authors.lastname: Munk
authors.forename: M J
authors.initials: MJ
authors.lastname: Lee
mesh_terms: D000368:Aged; D001018:Aortic Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000628:therapy; D001027:Aortography; D001157:Arterial Occlusive Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000628:therapy; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007083:Iliac Artery / Q000000981:diagnostic imaging / Q000503:physiopathology*; D007091:Image Processing, Computer-Assisted; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA