title: Lower extremity peripheral vein bypass graft wall thickness changes demonstrated at 1 and 6 months after surgery with ultra-high spatial resolution black blood inner volume three-dimensional fast spin echo magnetic resonance imaging.
abstract: OBJECTIVE
  To demonstrate lower extremity peripheral vein bypass graft wall thickness changes over time in a patient using very high spatial resolution cardiac gated, black blood inner volume three-dimensional (3D) fast spin echo (FSE) magnetic resonance imaging (MRI).
  
  
  METHODS
  A 52-year-old diabetic man with a history of hyperlipidemia underwent uncomplicated bypass grafting for an asymptomatic 5.2 cm popliteal artery aneurysm using reversed great saphenous vein. A segment of the bypass graft was studied at 1 and 6 months after surgery with cardiac gated inner volume 3D-FSE imaging with non-interpolated 0.195 mm(3) voxel volumes (0.3125 x 0.3125 x 2 mm). T1- and T2-weighted images were acquired in 10 min per contrast weighting. Graft imaging at one month after implantation illustrates expansion of the outer wall of the graft that partially resolves 5 months later.
  
  
  CONCLUSIONS
  In this patient, expansion of the lower extremity peripheral bypass graft wall can be characterized in clinical scan times with a 3D-FSE MRI protocol using highly selective inner volume excitation followed by non-selective refocusing pulses. The resulting 3D images can potentially be used to study the biology of the vessel wall.
authors: Department of Radiology, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA. frybicki@partners.org
authors: Frank John
authors: FJ
authors: Rybicki
authors: Dimitrios
authors: D
authors: Mitsouras
authors: Christopher D
authors: CD
authors: Owens
authors: Amanda G
authors: AG
authors: Whitmore
authors: Hale
authors: H
authors: Ersoy
authors: Robert V
authors: RV
authors: Mulkern
authors: Mark A
authors: MA
authors: Creager
authors: Michael S
authors: MS
authors: Conte
mesh_terms: D000783:Aneurysm / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D021621:Imaging, Three-Dimensional; D035002:Lower Extremity / Q000098:blood supply*; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D011150:Popliteal Artery / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D012501:Saphenous Vein / Q000637:transplantation*; D013997:Time Factors; D016896:Treatment Outcome; D014654:Vascular Patency