title: Diagnostic performance of multislice spiral computed tomography of coronary arteries as compared with conventional invasive coronary angiography: a meta-analysis.
abstract: OBJECTIVE
  This study was designed to define the current role of multislice spiral computed tomography (MSCT) for the diagnosis of coronary artery disease (CAD) using a meta-analytic process.
  
  
  BACKGROUND
  Multislice spiral computed tomography has recently been proposed as an alternative to conventional coronary angiography (CA) for the diagnosis of CAD.
  
  
  METHODS
  Using Medline, we identified 29 studies (2,024 patients) evaluating CAD by means of both MSCT (> or =16 slices) and conventional CA before July 2006. After data extraction the analysis was performed according to a random-effects model.
  
  
  RESULTS
  The per-segment analysis pooled the results from 27 studies corresponding to a cumulative number of 22,798 segments. Among unassessable segments, 4.2% were excluded from the analysis and 6.4% were classified at the discretion of the investigators, underscoring the shortcomings of MSCT. With this major limitation, the per-segment sensitivity and specificity were 81% (95% confidence interval [CI] 72% to 89%) and 93% (95% CI 90% to 97%), respectively, with positive and negative likelihood ratios of 21.5 (95% CI 13.1 to 35.5) and 0.11 (95% CI 0.06 to 0.21), respectively, and positive and negative predictive values of 67.8% (95% CI 57.6% to 78.0%) and 96.5% (95% CI 94.7% to 98.3%), respectively. As expected, the per-patient analysis has shown an increased sensitivity of 96% (95% CI 94% to 98%) but a decreased specificity of 74% (95% CI 65% to 84%).
  
  
  CONCLUSIONS
  Multislice spiral computed tomography has shortcomings difficult to overcome in daily practice and, at the more clinically relevant per-patient analysis, continues to have moderate specificity in patients with high prevalence of CAD. Studies evaluating the diagnostic performance of the newest generation of MSCT, including patients with low to moderate CAD prevalence, will be critical in establishing the clinical role of this emerging technology as an alternative to CA.
authors.affiliation: Department of Radiology of the University Hospital of Caen, Caen, Normandy, France.
authors.forename: Michèle
authors.initials: M
authors.lastname: Hamon
authors.forename: Giuseppe G L
authors.initials: GG
authors.lastname: Biondi-Zoccai
authors.forename: Patrizia
authors.initials: P
authors.lastname: Malagutti
authors.forename: Pierfrancesco
authors.initials: P
authors.lastname: Agostoni
authors.forename: Rémy
authors.initials: R
authors.lastname: Morello
authors.forename: Marco
authors.initials: M
authors.lastname: Valgimigli
authors.forename: Martial
authors.initials: M
authors.lastname: Hamon
mesh_terms: D017023:Coronary Angiography / Q000379:methods* / Q000592:standards; D003324:Coronary Artery Disease / Q000175:diagnosis / Q000000981:diagnostic imaging*; D003331:Coronary Vessels / Q000473:pathology*; D006801:Humans; D036542:Tomography, Spiral Computed / Q000379:methods* / Q000592:standards