title: Added value of coronal reformations for duty radiologists and for referring physicians or surgeons in the CT diagnosis of acute appendicitis.
abstract: OBJECTIVE
  To assess the added value of coronal reformation for radiologists and for referring physicians or surgeons in the CT diagnosis of acute appendicitis.
  
  
  METHODS
  Contrast-enhanced CT was performed using 16-detector-row scanners in 110 patients, 46 of whom had appendicitis. Transverse (5-mm thickness, 4-mm increment), coronal (5-mm thickness, 4-mm increment), and combined transverse and coronal sections were interpreted by four radiologists, two surgeons and two emergency physicians. The area under the receiver operating characteristic curve (Az value), sensitivity, specificity (McNemar test), diagnostic confidence and appendiceal visualization (Wilcoxon signed rank test) were compared.
  
  
  RESULTS
  For radiologists, the additional coronal sections tended to increase the Az value (0.972 vs. 0.986, p = 0.076) and pooled sensitivity (92% [95% CI:88, 96] vs. 96% [93, 99]), and enhanced appendiceal visualization in true-positive cases (p = 0.031). For non-radiologists, no such enhancement was observed, and the confidence for excluding acute appendicitis declined (p = 0.013). Coronal sections alone were inferior to transverse sections for diagnostic confidence as well as appendiceal visualization for each reader group studied (p < 0.05).
  
  
  CONCLUSIONS
  The added value of coronal reformation is more apparent for radiologists compared to referring physicians or surgeons in the CT diagnosis of acute appendicitis.
authors.affiliation: Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Gyeonggi-do, Korea.
authors.forename: Kyoung Ho
authors.initials: KH
authors.lastname: Lee
authors.forename: Young Hoon
authors.initials: YH
authors.lastname: Kim
authors.forename: Seokyung
authors.initials: S
authors.lastname: Hahn
authors.forename: Kyung Won
authors.initials: KW
authors.lastname: Lee
authors.forename: Hak Jong
authors.initials: HJ
authors.lastname: Lee
authors.forename: Tae Jung
authors.initials: TJ
authors.lastname: Kim
authors.forename: Sung-Bum
authors.initials: SB
authors.lastname: Kang
authors.forename: Joong Ho
authors.initials: JH
authors.lastname: Shin
authors.forename: Byung Joo
authors.initials: BJ
authors.lastname: Park
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000369:Aged, 80 and over; D001064:Appendicitis / Q000000981:diagnostic imaging* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012372:ROC Curve; D011856:Radiographic Image Enhancement; D012017:Referral and Consultation; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed