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Reliability of Artificial Intelligence-Based Cone Beam Computed Tomography Integration with Digital Dental Images
Published on: February 23, 2024
Influence of anatomical location on CT numbers in cone beam computed tomography
Matheus L Oliveira1, Guilherme M Tosoni, David H Lindsey
1Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Campinas, São Paulo, Brazil.
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.
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