title: [Efficacy of high-resolution CT in differential diagnosis of chronic suppurative otitis media and cholesteatoma otitis media by soft-tissue shadows].
abstract: OBJECTIVE
  To evalute the efficacy of high-resolution CT(HRCT) in differential diagnosis and treatment of chronic suppurative otitis media and cholesteatoma otitis media by soft-tissue shadows.
  
  
  METHODS
  HRCT scanning was performed in 120 cases, 153 ears, with chronic otitis suppurative media and cholesteatoma otitis media, of which original data were processed with multi-planar reconstruction (MPR) and maximum intensity projection (MIP), the characteristics of the soft-tissue shadows' growth, window width or window leveling and bony destruction were respectively observed, as well as compared with the surgery findings.
  
  
  RESULTS
  In 120 patients (153 ears), 109 ears were diagnosed as cholesteatoma otitis media, and 44 ears were diagnosed as chronic suppurative otitis media, among which 33 ears had granulation tissue and 11 ears had secretion. One hundred and seven ears were postoperatively diagnosed as cholesteatoma otitis media, among which 25 ears had granulation tissue. Among 46 ears of chronic suppurative otitis media, 35 ears had granulation tissue, and only 11 ears had secretion. A 98.6% diagnostic accuracy can be reached with HRCT in diagnosing cholesteatoma otitis media and chronic suppurative otitis media. The Youden's index was 0.98, 0.98 and 1.00 respectively with HRCT in diagnosing cholesteatoma, granulation tissue and secretion.
  
  
  CONCLUSIONS
  Combination of the three different imaging methods, axial images, coronal MPR images and MIP images, can improve the efficacy of the HRCT diagnosis and definite chronic otitis media, which can be routinely used for surgery plan.
authors.affiliation: Department of Otorhinolaryngology, Qilu Children's Hospital of Shandong University, Jinan 250022, China. sunxiaowei2000@163.com
authors.forename: Xiao-wei
authors.initials: XW
authors.lastname: Sun
authors.forename: Jian-ji
authors.initials: JJ
authors.lastname: Zhang
authors.forename: Yuan-ping
authors.initials: YP
authors.lastname: Ding
authors.forename: Fen-fen
authors.initials: FF
authors.lastname: Dou
authors.forename: Han-bing
authors.initials: HB
authors.lastname: Zhang
authors.forename: Ke-bo
authors.initials: KB
authors.lastname: Gong
authors.forename: An-ting
authors.initials: AT
authors.lastname: Xu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D018424:Cholesteatoma, Middle Ear / Q000000981:diagnostic imaging*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010035:Otitis Media, Suppurative / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult