title: Coronary artery imaging using three-dimensional breath-hold steady-state free precession with two-dimensional iterative partial fourier reconstruction.
abstract: OBJECTIVE
  To assess the feasibility of using a two-dimensional partial Fourier (PF) reconstruction scheme to reduce the acquisition time of magnetic resonance imaging (MRI) of coronary arteries.
  
  
  METHODS
  Symmetric k-space data sets of coronary arteries were collected in seven volunteers using a three-dimensional breath-hold steady-state free precession (SSFP) sequence. Partial, asymmetric k-space data sets were generated by removing 25% of the data in the readout direction and 25% of the data in the phase encoding direction. The missing data were then estimated using a two-dimensional projection-onto-convex-sets (POCS) algorithm or filled with zeroes. Images were reconstructed from the full data set, the PF data set, and the zero-filled (ZF) data set, respectively. Coronary artery sharpness was evaluated quantitatively and qualitatively.
  
  
  RESULTS
  Coronary artery sharpness in PF images was comparable to that in full k-space images and significantly better than that in ZF images.
  
  
  CONCLUSIONS
  Two-dimensional POCS PF reconstruction is a potentially useful technique for reducing acquisition time or improving spatial resolution for breath-hold coronary MR angiography.
authors.affiliation: Department of Radiology, Northwestern University, Chicago, Illinois, USA.
authors.forename: Ravi K
authors.initials: RK
authors.lastname: Singh
authors.forename: Vibhas S
authors.initials: VS
authors.lastname: Deshpande
authors.forename: E Mark
authors.initials: EM
authors.lastname: Haacke
authors.forename: Steven M
authors.initials: SM
authors.lastname: Shea
authors.forename: Yingbiao
authors.initials: Y
authors.lastname: Xu
authors.forename: Richard M
authors.initials: RM
authors.lastname: McCarthy
authors.forename: James
authors.initials: J
authors.lastname: Carr
authors.forename: Debiao
authors.initials: D
authors.lastname: Li
mesh_terms: D000328:Adult; D003331:Coronary Vessels / Q000033:anatomy & histology*; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged