Absorbed and effective dose from newly developed cone beam computed tomography in Korea.
- Author:
Jong Nyeong LEE
1
;
Won Jeong HAN
;
Eun Kyung KIM
Author Information
1. Department of Oral and Maxillofacial Radioloigy, School of Dentistry, Dankook University, Korea. ekkim@dku.edu
- Publication Type:Original Article
- Keywords:
Dosimetry;
Tomography, Cone Beam Computed;
Radiography, Panoramic
- MeSH:
Cone-Beam Computed Tomography*;
Female;
Head;
Humans;
Korea*;
Molar;
Neck;
Proline;
Radiography, Panoramic
- From:Korean Journal of Oral and Maxillofacial Radiology
2007;37(2):93-102
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: Cone beam computed tomography (CBCT) provides a lower dose and cost alternative to conventional CT, promising to revolutionize the practice of oral and maxillofacial radiology. The purpose of this study was to evaluate the absorbed and effective doses of Implagraphy and VCT (Vatech Co., Hwasung, Korea) and compare them with those of panoramic radiography. MATERIALS AND METHODS: Thermoluminescent dosimeter (TLD) chips were placed at 27 sites throughout the layers of Female ART Head and Neck Phantom for dosimetry. Implagraphy, VCT units, and Planmeca Proline XC panoramic unit were used for radiation exposures. Radiation weighted doses and effective doses were measured and calculated using 1990 and 2005 ICRP tissue weighting factors. RESULTS: Effective doses in Sv (ICRP 2005, ICRP 1990) were 90.19, 61.62 for Implagraphy at maxillay molar area, 123.20, 90.02 for Implagraphy at mandibular molar area, 183.55, 139.26 for VCT and 40.92, 27.16 for panoramic radiography. CONCLUSION: Effective doses for VCT and Implagraphy were only about 2.2 to 4.5 times greater than those for panoramic radiography. VCT and Implagraphy, CBCT machines recently developed in Korea, showed moderately low effective doses.
