Absorbed dose model to scan parameters in dental cone beam computed tomography
- Resource Type
- Authors
- Shumei Jia; Li Zhang; Yuxiang Xing; Xiaoyue Guo
- Source
- 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).
- Subject
- Cone beam computed tomography
Materials science
medicine.diagnostic_test
Computed tomography
Field of view
030206 dentistry
equipment and supplies
Imaging phantom
030218 nuclear medicine & medical imaging
03 medical and health sciences
0302 clinical medicine
stomatognathic system
Absorbed dose
Medical imaging
medicine
Beam (structure)
Dental cone
Biomedical engineering
- Language
Cone beam computed tomography (CBCT) is widely applied in dental and maxillofacial diagnostic imaging, which raises great concerns to radiological dose caused by this device. This work measures the absorbed dose inside an uniform cylindrical phantom when it is scanned by dental CBCT at different scan parameters of mAs and kV; meanwhile, studies the relationship of absorbed dose to scan parameters. The result indicates that absorbed dose is correlated to scan parameters in an empirical model form of D = (a • HVL2 + b)• mAs with coefficient of determination above 0.99. This empirical model can be applied to other type dental CBCT devices to provide as an estimation method of radiology dose at different scan parameter settings. Moreover, absorbed dose is proportional to field of view size and inversely proportional to phantom size.