title: k-t BLAST and SENSE accelerated time-resolved three-dimensional phase contrast MRI in an intracranial aneurysm.
abstract: OBJECTIVE
  The objective of this study was to investigate the performance of k-t BLAST (Broad-use Linear Acquisition Speed-up Technique) accelerated time-resolved 3D PC-MRI compared to SENSE (SENSitivity Encoding) acceleration in an in vitro and in vivo intracranial aneurysm.
  
  
  METHODS
  Non-accelerated, SENSE and k-t BLAST accelerated time-resolved 3D PC-MRI measurements were performed in vivo and in vitro. We analysed the consequences of various temporal resolutions in vitro.
  
  
  RESULTS
  Both in vitro and in vivo measurements showed that the main effect of k-t BLAST was underestimation of velocity during systole. In the phantom, temporal blurring decreased with increasing temporal resolution. Quantification of the differences between the non-accelerated and accelerated measurements confirmed that in systole SENSE performed better than k-t BLAST in terms of mean velocity magnitude. In both in vitro and in vivo measurements, k-t BLAST had higher SNR compared to SENSE. Qualitative comparison between measurements showed good similarity.
  
  
  CONCLUSIONS
  Comparison with SENSE revealed temporal blurring effects in k-t BLAST accelerated measurements.
authors.affiliation: Department of Radiology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands. pim.vanooij@gmail.com
authors.forename: Pim
authors.initials: P
authors.lastname: van Ooij
authors.forename: Annetje
authors.initials: A
authors.lastname: Guédon
authors.forename: Henk A
authors.initials: HA
authors.lastname: Marquering
authors.forename: Joppe J
authors.initials: JJ
authors.lastname: Schneiders
authors.forename: Charles B
authors.initials: CB
authors.lastname: Majoie
authors.forename: Ed
authors.initials: E
authors.lastname: van Bavel
authors.forename: Aart J
authors.initials: AJ
authors.lastname: Nederveen
mesh_terms: D001783:Blood Flow Velocity; D002536:Cerebral Arteries / Q000473:pathology / Q000503:physiopathology*; D002560:Cerebrovascular Circulation; D003198:Computer Simulation; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D002532:Intracranial Aneurysm / Q000473:pathology / Q000503:physiopathology*; D018810:Magnetic Resonance Angiography / Q000295:instrumentation / Q000379:methods*; D008955:Models, Cardiovascular; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity