title: Sinogram-based coil selection for streak artifact reduction in undersampled radial real-time magnetic resonance imaging.
abstract: BACKGROUND
  Streak artifacts are a common problem in radial magnetic resonance imaging (MRI). We therefore developed a method for automatically excluding receiver coil elements which lead to these artifacts.
  
  
  METHODS
  The proposed coil selection relates to real-time MRI data based on highly undersampled radial acquisitions. It exploits differences between high- and low-resolution sinograms reconstructed from datasets acquired during preparatory scans. Apart from phantom validations, the performance was assessed for real-time MRI studies of different human organ systems in vivo.
  
  
  RESULTS
  The algorithm greatly reduces streak artifact strength without compromising image quality in other parts of the image. It is robust with respect to different experimental settings and fast to be included in the online reconstruction pipeline for real-time MRI.
  
  
  CONCLUSIONS
  The proposed method enables a fast reduction of streak artifacts in radial real-time MRI.
authors.affiliation: Max Planck Institute for Biophysical Chemistry, 37070 Göttingen, Germany.
authors.forename: H Christian M
authors.initials: HC
authors.lastname: Holme
authors.affiliation: Max Planck Institute for Biophysical Chemistry, 37070 Göttingen, Germany;; DZHK (German Center for Cardiovascular Research), partner site Göttingen, Göttingen, Germany.
authors.forename: Jens
authors.initials: J
authors.lastname: Frahm
keywords: Coil selection; radial MRI; real-time MRI; streak artifacts