Time-resolved undersampled projection reconstruction magnetic resonance imaging of the peripheral vessels using multi-echo acquisition.
The hybrid projection reconstruction (PR) imaging provides high temporal resolution through an undersampled PR acquisition for the in-plane dimensions and Cartesian slice encoding for the through-plane dimension. The undersampling of projection data introduces streak artifact, which may severely compromise image quality. This study reports on a combination of multi-echo acquisition with time-resolved undersampled PR imaging and its application to peripheral magnetic resonance angiography. Multi-echo acquisition improved imaging speed effectively, thereby reducing the undersampling streak artifact and improving the temporal resolution. The gradient distortion was reduced through gradient calibration and accurate k-space trajectory measurement.
Du
Jiang
J
Department of Medical Physics, University of Wisconsin, E3/311 Clinical Science Center, 600 Highland Avenue, Madison, WI 53792-3252, USA. jiang@mr.radiology.wisc.edu
Lu
Aiming
A
Block
Walter F
WF
Thornton
Francis J
FJ
Grist
Thomas M
TM
Mistretta
Charles A
CA
D016477:Artifacts; D003287:Contrast Media; D019786:Gadolinium DTPA; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007866:Leg / Q000098:blood supply; D018810:Magnetic Resonance Angiography / Q000379:methods*; D019047:Phantoms, Imaging; D013997:Time Factors
D003287:Contrast Media; C064925:gadodiamide; D019786:Gadolinium DTPA