title: Improved 2D time-of-flight angiography using a radial-line k-space acquisition.
abstract: For flow imaging applications, radial-line k-space acquisition methods offer advantages over conventional 2DFT methods. Specifically, radial-line acquisition methods mitigate artifacts resulting from pulsatile flow while offering a potential reduction in scan times. In this paper, radial-line and 2DFT acquisitions are compared in a two-dimensional time-of-flight angiography sequence. The twisting radial-line (TwiRL) trajectory, a variant of 2D projection reconstruction, is used to represent the family of radial-line trajectories. In both phantom and in vivo studies, the TwiRL images demonstrate improved vessel depiction including a more uniform signal intensity and better delineation of the vasculature in comparison with images obtained via the 2DFT method.
authors.affiliation: Department of Electrical Engineering, Stanford University, California, USA.
authors.forename: H T
authors.initials: HT
authors.lastname: Nielsen
authors.forename: E W
authors.initials: EW
authors.lastname: Olcott
authors.forename: D G
authors.initials: DG
authors.lastname: Nishimura
mesh_terms: D001157:Arterial Occlusive Diseases / Q000175:diagnosis / Q000473:pathology; D016477:Artifacts; D001808:Blood Vessels / Q000033:anatomy & histology / Q000473:pathology; D002712:Chlorides; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007866:Leg / Q000098:blood supply; D018810:Magnetic Resonance Angiography / Q000379:methods*; D017895:Manganese Compounds; D019047:Phantoms, Imaging; D011150:Popliteal Artery / Q000033:anatomy & histology; D011673:Pulsatile Flow; D012039:Regional Blood Flow; D016909:Tibial Arteries / Q000473:pathology
chemical_list: D002712:Chlorides; D017895:Manganese Compounds; C025340:manganese chloride