title: Multisegment and halfscan reconstruction of 16-slice computed tomography for detection of coronary artery stenoses.
abstract: OBJECTIVE
  To compare the diagnostic accuracy and image quality of 2 reconstruction algorithms (multisegment and halfscan) for computed tomography (CT) coronary angiography in patients without beta-blocker medication.
  
  
  METHODS
  Thirty-four patients with 42 significant coronary stenoses in 136 main coronary branches were examined using a 16-slice CT scanner (Aquilion, Toshiba, Otawara, Japan). Twenty-seven patients (79%) had heart rates above 65 beats/min.
  
  
  RESULTS
  Without exclusion of branches the sensitivity, specificity, accuracy, and rate of nonassessable segments with multisegment versus halfscan reconstruction were 88 versus 74%, 91 versus 71%, 90 versus 72%, and 2 versus 21% (P < 0.01), respectively. Multisegment reconstruction improved the average vessel length free of motion artifacts by 56% compared with halfscan reconstruction (P < 0.01). Image quality in terms of vessel continuity and visibility of side branches (P < 0.005) was significantly better using multisegment reconstruction.
  
  
  CONCLUSIONS
  Multisegment reconstruction has superior diagnostic accuracy and image quality compared with halfscan reconstruction in patients with normal heart rates.
authors.affiliation: Department of Radiology, Charité, Medical School of the Freie Universität and Humboldt-Universität zu Berlin, Berlin, Germany. marc.dewey@charite.de
authors.forename: Marc
authors.initials: M
authors.lastname: Dewey
authors.forename: Michael
authors.initials: M
authors.lastname: Laule
authors.forename: Lasse
authors.initials: L
authors.lastname: Krug
authors.forename: Dirk
authors.initials: D
authors.lastname: Schnapauff
authors.forename: Patrik
authors.initials: P
authors.lastname: Rogalla
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Rutsch
authors.forename: Bernd
authors.initials: B
authors.lastname: Hamm
authors.forename: Alexander
authors.initials: A
authors.lastname: Lembcke
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017023:Coronary Angiography; D023921:Coronary Stenosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed