Comparison of dose assessment methods for dental CBCT examinations based on whole-body anthropomorphic phantom
10.13491/j.issn.1004-714X.2026.03.006
- VernacularTitle:基于全身拟人模体的口腔CBCT检查受检者剂量评估方法
- Author:
Jinping CAO
1
;
Hui XU
1
;
Xian XUE
1
;
Zechen FENG
2
;
Jiahe CHEN
1
Author Information
1. Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China.
2. Beijing Center for Disease Prevention and Control, Beijing Preventive Medicine Research Center, Beijing 100013, China.
- Publication Type:OriginalArticles
- Keywords:
Dental cone beam computed tomography;
Effective dose;
Entrance surface air kerma;
Thermoluminescent detector;
Radiation protection
- From:
Chinese Journal of Radiological Health
2026;35(3):343-348
- CountryChina
- Language:Chinese
-
Abstract:
Objective This study compared organ doses and effective doses in typical adult patients during dental CBCT examinations using a head-and-neck anthropomorphic phantom and a whole-body phantom. It aimed to determine an appropriate method for evaluating effective dose in dental CBCT. Methods A domestically manufactured dental CBCT unit was used to scan an adult male anthropomorphic phantom under simulated clinical conditions. Thermoluminescent dosimeters were placed on organs and tissues of a whole-body anthropomorphic phantom. Organ equivalent doses were measured, and effective doses were calculated using two approaches: one based on all organ doses from the whole-body phantom, and the other based only on head-and-neck organ doses. Entrance surface air kerma (Ka,e) was also measured at the lens of the eye, thyroid, thymus, and gonads. Results The effective dose estimated with the whole-body phantom was 382.03 μSv. The effective dose estimated with the head-and-neck phantom was 354.03 μSv. The radiation dose to head-and-neck organs and tissues accounted for 92.7% of the total effective dose. The highest Ka,e values were found in the parotid glands, followed by the lens of the eye. Conclusion During dental CBCT scanning, the contribution of organ below the head and neck to the total effective dose is limited. To simplify dose assessment procedures, the effective dose for the patient can be evaluated using only a head-and-neck phantom.
