title: Assessment of computerized tomography density patterns of ameloblastomas and keratocystic odontogenic tumors.
abstract: The aim of this study was to evaluate computerized tomography (CT) density patterns of solid ameloblastomas (SA), unicystic ameloblastomas (UA), and sporadic and multiple keratocystic odontogenic tumors (SK and MK, respectively). A region of interest (ROI) was delimited corresponding to almost the entire lesional area on each axial slice of 25 CT exams. For each ROI, CT values (HU(ROI)) and heterogeneity (HTG(ROI)) were recorded and compared among lesion groups as well as among central and peripheral slices of the same lesion. The average HU(ROI) were: SA 35.9 +/- 12.6; UA 31.0 +/- 6.0; SK 28.4 +/- 10.5; and MK 30.5 +/- 20.6. SK and MK had the lowest CT values and highest heterogeneity. SA and UA did not show statistical difference for HU(ROI). However, SA had greater HTG(ROI) values. SA presented a different pattern when the central slices were compared with the peripheral slices. HU(ROI) was higher, whereas HTG(ROI) was lower, among the central slices of SA.
authors.affiliation: Department of Oral and Maxillofacial Radiology, School of Dentistry, Federal University of Bahia, Salvador, Brazil.
authors.forename: Ieda
authors.initials: I
authors.lastname: Crusoé-Rebello
authors.forename: Christiano
authors.initials: C
authors.lastname: Oliveira
authors.forename: Paulo Sérgio Flores
authors.initials: PS
authors.lastname: Campos
authors.forename: Roberto Almeida
authors.initials: RA
authors.lastname: Azevedo
authors.forename: Jean Nunes
authors.initials: JN
authors.lastname: dos Santos
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods; D000293:Adolescent; D000328:Adult; D000564:Ameloblastoma / Q000145:classification / Q000000981:diagnostic imaging*; D002648:Child; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007573:Jaw Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D009808:Odontogenic Tumors / Q000145:classification / Q000000981:diagnostic imaging*; D011856:Radiographic Image Enhancement / Q000379:methods; D012189:Retrospective Studies; D036542:Tomography, Spiral Computed / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult