title: Comparison of brain MR images at 1.5T using BLADE and rectilinear techniques for patients who move during data acquisition.
abstract: OBJECTIVE
  MR imaging of moving patients can be challenging and motion correction techniques have been proposed though some have associated new artifacts. The objective of this study was to semiquantitatively compare brain MR images of moving patients obtained at 1.5T by using partially radial and rectilinear acquisition techniques.
  
  
  METHODS
  FLAIR, T2-, T1-, and contrast-enhanced T1-weighted image sets of 25 patients (14-94 years) obtained by using BLADE (like PROPELLER, a partially radial acquisition) and rectilinear techniques in the same imaging session were compared by 2 neuroradiologists in terms of extent of the motion artifact, image quality, and lesion visibility. ICC between opinions of the evaluators was calculated.
  
  
  RESULTS
  Of the total of 70 image sets, the motion artifact was small in the partially radial images in 43 and in the rectilinear images in 13, and the opinions of the evaluators were discordant in the remaining 14 sets (ICC = 0.63, P < .05). The quality of partially radial images was higher for 36 sets versus 9 rectilinear sets, with disagreement between the 2 evaluators in the remaining 25 (ICC = 0.15, P < .05). Pathologic lesions were better characterized on 37 sets of partially radial images versus 13 sets of rectilinear images, and opinions of the evaluators differed in 20 sets (ICC = 0.90, P < .05). The neuroradiologists deemed 4 sets of rectilinear images nondiagnostic compared with only 1 set of radial images.
  
  
  CONCLUSIONS
  The data demonstrate that our application of BLADE sequences reduces the extent of motion artifacts in brain images of moving patients, improving image quality and lesion characterization.
authors.affiliation: Department of Radiology, University Hospitals, Case Center for Imaging Research, Cleveland, Ohio, USA.
authors.forename: E
authors.initials: E
authors.lastname: Nyberg
authors.forename: G S
authors.initials: GS
authors.lastname: Sandhu
authors.forename: J
authors.initials: J
authors.lastname: Jesberger
authors.forename: K A
authors.initials: KA
authors.lastname: Blackham
authors.forename: D P
authors.initials: DP
authors.lastname: Hsu
authors.forename: M A
authors.initials: MA
authors.lastname: Griswold
authors.forename: J L
authors.initials: JL
authors.lastname: Sunshine
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000465:Algorithms; D016477:Artifacts; D001921:Brain / Q000473:pathology*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009068:Movement; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D055815:Young Adult
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