Influence of anatomical location on CT numbers in cone beam computed tomography
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Data
2013-04-01
Autores
Oliveira, Matheus L.
Tosoni, Guilherme Monteiro [UNESP]
Lindsey, David H.
Mendoza, Kristopher
Tetradis, Sotirios
Mallya, Sanjay M.
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Resumo
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.
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Palavras-chave
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
Como citar
Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, v. 115, n. 4, p. 558-564, 2013.