| Full text | |
| Author(s): |
Brasil, Danieli Moura
;
Merken, Karen
;
Binst, Joke
;
Bosmans, Hilde
;
Haiter-Neto, Francisco
;
Jacobs, Reinhilde
Total Authors: 6
|
| Document type: | Journal article |
| Source: | Dentomaxillofacial Radiology; v. 52, n. 3, p. 11-pg., 2023-02-01. |
| Abstract | |
Objective: To present patient dose levels for different CBCT scanners, acquired by a dose monitoring tool in a University Hospital, as a function of field of view (FOV), operation mode, and patient age. Methods: An integrated dose monitoring tool was used to collect radiation exposure data [type of CBCT unit, dose -area product (DAP), FOV size, and operation mode] and patient demographic information (age, referral department) performed on a 3D Accuitomo 170 and a Newtom VGI EVO unit. Effective dose conversion factors were calculated and implemented into the dose moni-toring system. For each CBCT unit, the frequency of examinations, clinical indications, and effec-tive dose levels were obtained for different age and FOV groups, and operation modes. Results: A total of 5163 CBCT examinations were analyzed. Surgical planning and follow -up were the most frequent clinical indications. For the standard operation mode, effective doses ranged from 35.1 to 300 mu Sv and 9.26-117 mu Sv using 3D Accuitomo 170 and Newtom VGI EVO, respec-tively. In general, effective doses decreased with increasing age and FOV size reduction. Conclusions: Effective dose levels varied notably between systems and operation modes. Operation mode selection and FOV size were indication-oriented, with larger FOV sizes elec-tion serving surgical planning and follow -up. Seeing the influence of FOV size on effective dose levels, manufacturers could be advised to move toward patient-specific collimation and dynamic FOV selection. Systematically monitoring patient doses could be recommended for steering future CBCT optimization. (AU) | |
| FAPESP's process: | 19/00682-0 - Determination of lower dose protocols with suitable image quality for an off-axis geometry computed tomography unit |
| Grantee: | Danieli Moura Brasil |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 20/03644-0 - Optimization strategies in CBCT thought development of institutional diagnostic reference levels of radiation dose and assessment of the influence of a narrow off-axis geometry computed tomography unit in image quality and radiation dose |
| Grantee: | Danieli Moura Brasil |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |