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|Type:||Artigo de periódico|
|Title:||Influence of anatomical location on CT numbers in cone beam computed tomography|
|Abstract:||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 K2HPO4 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. (Oral Surg Oral Med Oral Pathol Oral Radiol 2013;115:558 564)|
|Editor:||Elsevier Science Inc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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