title: [Detection and diagnosis of coronary arteries using multi-detector CT].
abstract: OBJECTIVE
  In this study coronary arteries were compared and evaluated in 41 cases using multidetector CT with slice thicknesses of 2 mm and 1 mm. All 323 segments including #1-3, 5-8, and 11 [based on the American Heart Association (AHA) classification system] were used: 163 segments of 2 mm and 160 segments of 1 mm.
  
  
  METHODS
  The images obtained were separated into fivelevels (0-4 points) of cardiac motion artifacts and evaluated based on volume rendering (VR) and partial maximum intensity projection (partial MIP).
  
  
  RESULTS
  Of the results obtained, slice images of 1 mm in thickness were superior to those of 2 mm by 15.4% for sensitivity, 7.5% for specificity, and 8.2% for accuracy. On evaluation by segment, diagnostic accuracy was 2.88 +/- 0.57 for 2-mm slices and 3.28 +/- 0.59 for 1-mm slices of the left coronary artery, and 2.11 +/- 0.82 for 2-mm slices and 2.33 +/- 0.67 for 1-mm slices of the right coronary artery. Particularly for #6, a significantly high value was found for 1-mm slices (p < 0.05). Diagnostic accuracy was low in groups #2 and #3.
  
  
  CONCLUSIONS
  On the basis of these findings, we were persuaded of the usefulness of MDCT for the evaluation of coronary arterial stenosed lesions, and we consider that diagnostic capability is improved by using thinner slices. We concluded that further studies would be necessary for visualization of the right coronary artery, which was seriously affected by cardiac motion artifacts.
authors.affiliation: Department of Radiology, Kyorin University School of Medicine.
authors.forename: Syuji
authors.initials: S
authors.lastname: Takahashi
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Nitatori
authors.forename: Kenichi
authors.initials: K
authors.lastname: Yokoyama
authors.forename: Jyunichi
authors.initials: J
authors.lastname: Hachiya
authors.forename: Eisei
authors.initials: E
authors.lastname: Kachi
authors.forename: Hideaki
authors.initials: H
authors.lastname: Yoshino
mesh_terms: D000328:Adult; D000368:Aged; D016477:Artifacts; D017023:Coronary Angiography / Q000379:methods*; D023921:Coronary Stenosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*