Imaging Sci Dent.  2018 Mar;48(1):21-30. 10.5624/isd.2018.48.1.21.

Estimation of the effective dose of dental cone-beam computed tomography using personal computer-based Monte Carlo software

Affiliations
  • 1Department of Oral and Maxillofacial Radiology, College of Dentistry, Dankook University, Cheonan, Korea. ekkim@dankook.ac.kr
  • 2Dental Hospital, School of Dentistry, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia.

Abstract

PURPOSE
To calculate the effective doses of cone-beam computed tomography (CBCT) using personal computer-based Monte Carlo (PCXMC) software (Radiation and Nuclear Safety Authority, Helsinki, Finland) and to compare the calculated effective doses with those measured using thermoluminescent dosimeters (TLDs) and an anthropomorphic phantom.
MATERIALS AND METHODS
An Alphard VEGA CBCT scanner (Asahi Roentgen Ind. Co., Kyoto, Japan) with multiple fields of view (FOVs) was used for this study. The effective doses of the scout and main projections of CBCT using 1 large and 2 medium FOVs with a height >10 cm were calculated using PCXMC and PCXMCRotation software and then were compared with the doses obtained using TLD-100 LiF and an anthropomorphic adult human male phantom. Furthermore, it was described how to determine the reference points on the Y- and Z-axes in PCXMC, the important dose-determining factors in this software.
RESULTS
The effective doses at CBCT for 1 large (20.0 cm×17.9 cm) and 2 medium FOVs (15.4 cm×15.4 cm and 10.2 cm×10.2 cm) calculated by the PCXMC software were 181, 300, and 158 µSv, respectively. These values were comparable (16%-18% smaller) to those obtained through TLD measurements in each mode.
CONCLUSION
The use of PCXMC software could be an alternative to the TLD measurement method for effective dose estimation in CBCT with large and medium FOVs.

Keyword

Cone-Beam Computed Tomography; Radiation Dosage; Radiation Protection

MeSH Terms

Adult
Cone-Beam Computed Tomography*
Humans
Male
Methods
Radiation Dosage
Radiation Protection
Full Text Links
  • ISD
Actions
Cited
CITED
export Copy
Close
Share
  • Twitter
  • Facebook
Similar articles
    DB Error: unknown error