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Influence of anatomical location on CT numbers in cone beam computed tomography
  • Universidade Estadual de Campinas (UNICAMP)
  • Universidade Estadual Paulista (UNESP)
  • University of California
  • University of California, Los Angeles
Objective: To assess the influence of anatomical location on computed tomography (CT) numbers in mid- and full field of view (FOV) cone beam computed tomography (CBCT) scans. Study Design: Polypropylene tubes with varying concentrations of dipotassium hydrogen phosphate (K2HPO4) solutions (50-1200 mg/mL) were imaged within the incisor, premolar, and molar dental sockets of a human skull phantom. CBCT scans were acquired using the NewTom 3G and NewTom 5G units. The CT numbers of the K2HPO 4 phantoms were measured, and the relationship between CT numbers and K2HPO4 concentration was examined. The measured CT numbers of the K2HPO4 phantoms were compared between anatomical sites. Results: At all six anatomical locations, there was a strong linear relationship between CT numbers and K2HPO4 concentration (R 2 > 0.93). However, the absolute CT numbers varied considerably with the anatomical location. Conclusion: The relationship between CT numbers and object density is not uniform through the dental arch on CBCT scans. © 2013 Elsevier Inc.
Issue Date: 
Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, v. 115, n. 4, p. 558-564, 2013.
Time Duration: 
  • hydroxyapatite
  • phosphate
  • potassium derivative
  • potassium dihydrogen phosphate
  • chemistry
  • comparative study
  • cone beam computed tomography
  • equipment
  • human
  • image processing
  • image quality
  • incisor
  • molar tooth
  • premolar tooth
  • radiation dose
  • radiation scattering
  • radiography
  • statistics
  • three dimensional imaging
  • tooth arch
  • tooth socket
  • X ray
  • Bicuspid
  • Cone-Beam Computed Tomography
  • Dental Arch
  • Durapatite
  • Humans
  • Image Processing, Computer-Assisted
  • Imaging, Three-Dimensional
  • Incisor
  • Molar
  • Phantoms, Imaging
  • Phosphates
  • Potassium Compounds
  • Radiation Dosage
  • Scattering, Radiation
  • Tooth Socket
  • X-Rays
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Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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