title: [Noninvasive evaluation of coronary bypass grafts by magnetic resonance imaging. Comparison of the Haste and Fisp-3-D sequences with the conventional coronary angiography].
abstract: The aim of the study was to evaluate the patency of coronary artery bypass grafts (CABG) with the 2D and 3D magnetic resonance (MR) imaging techniques. 29 patients with 74 bypass grafts and a total of 91 distal anastomoses were studied on a 1.5 Tesla scanner using a phased array body coil. A 2D T-2 weighted breathhold turbo spin echo sequence (Haste) and a 3D breath hold contrast enhanced MR angiography sequence (Fisp-3-D) were performed. With the Haste and Fisp-3-D sequences 55 of the 58 patent and 15 of the 16 occluded grafts were recognized; the sensitivity and specificity were 95% and 94%, respectively. With the Haste sequence 74% (47/63) and with the Fisp-3-D sequence 64% (40/63) of the distal anastomoses were seen in good image quality. Only 3 of 8 significant grafts stenoses were detected. The patency of CABGs can be evaluated non-invasively with the Haste and the Fisp-3-D angiography sequences. Better results can be expected with the development of a blood-pool contrast medium and the combination of MR flow measurements with imaging techniques.
authors.affiliation: 2. Medizinische Klinik der Johannes-Gutenberg-Universität, Langenbeckstr. 1, D-55131 Mainz.
authors.forename: T
authors.initials: T
authors.lastname: Wittlinger
authors.forename: T
authors.initials: T
authors.lastname: Voigtländer
authors.forename: K
authors.initials: K
authors.lastname: Grauvogel
authors.forename: J
authors.initials: J
authors.lastname: Meyer
authors.forename: K F
authors.initials: KF
authors.lastname: Kreitner
authors.forename: P
authors.initials: P
authors.lastname: Kalden
authors.forename: M
authors.initials: M
authors.lastname: Thelen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000714:Anastomosis, Surgical; D003287:Contrast Media; D017023:Coronary Angiography; D001026:Coronary Artery Bypass; D005260:Female; D005500:Follow-Up Studies; D006083:Graft Occlusion, Vascular / Q000175:diagnosis*; D006801:Humans; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D007472:Iohexol / Q000031:analogs & derivatives; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity
chemical_list: D003287:Contrast Media; D007472:Iohexol; C038192:iopromide