title: Impact of a motion correction algorithm on quality and diagnostic utility in unselected patients undergoing coronary CT angiography.
abstract: OBJECTIVE
  The aims of the study were to investigate the diagnostic utility of motion correction reconstruction algorithm Snapshot Freeze (SSF) compared to the standard reconstruction algorithm (STD) in coronary computed tomography angiography (CCTA) images where a prescan heart-rate-lowering protocol is fully integrated.
  
  
  METHODS
  CCTA was performed in 140 patients. Two independent blinded readers made image evaluation of the SSF and STD images.
  
  
  RESULTS
  SSF reduced the motion artifacts (30% vs. 41%; P<.05) and improved the image quality ("excellent" images: 52% vs. 42%; P=.022), but did not influence diagnostic utility ("nondiagnostic" images: 10% vs. 14%; P=.104).
  
  
  CONCLUSIONS
  The use of the SSF algorithm reduced the presence of motion artifacts and improved image quality, but did not influence the diagnostic utility.
authors.affiliation: Medicinsk Forskningsafdeling, OUH Svendborg Sygehus, Institute of Regional Health Research, Valdemarsgade 53, 5700 Svendborg, Denmark. Electronic address: Hussam.Sheta@rsyd.dk.
authors.forename: Hussam Mahmoud
authors.initials: HM
authors.lastname: Sheta
authors.affiliation: Medicinsk Forskningsafdeling, OUH Svendborg Sygehus, Institute of Regional Health Research, Valdemarsgade 53, 5700 Svendborg, Denmark.
authors.forename: Kenneth
authors.initials: K
authors.lastname: Egstrup
authors.affiliation: Medicinsk Forskningsafdeling, OUH Svendborg Sygehus, Institute of Regional Health Research, Valdemarsgade 53, 5700 Svendborg, Denmark.
authors.forename: Mirza
authors.initials: M
authors.lastname: Husic
authors.affiliation: Medicinsk Forskningsafdeling, OUH Svendborg Sygehus, Institute of Regional Health Research, Valdemarsgade 53, 5700 Svendborg, Denmark.
authors.forename: Laurits Juhl
authors.initials: LJ
authors.lastname: Heinsen
authors.affiliation: Medicinsk Forskningsafdeling, OUH Svendborg Sygehus, Institute of Regional Health Research, Valdemarsgade 53, 5700 Svendborg, Denmark.
authors.forename: Jess
authors.initials: J
authors.lastname: Lambrechtsen
mesh_terms: D000465:Algorithms; D016477:Artifacts; D017023:Coronary Angiography / Q000379:methods / Q000592:standards*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009038:Motion; D061330:Multidetector Computed Tomography / Q000379:methods*; D017202:Myocardial Ischemia / Q000000981:diagnostic imaging*; D015203:Reproducibility of Results
keywords: Coronary computed tomography; Diagnostic utility; Motion artifacts; Motion correction algorithm; Snapshot Freeze