Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
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Absorbed and effective dose from periapical radiography by portable intraoral x-ray machine

이동형 구내 방사선촬영기로 촬영한 치근단 방사선사진의 흡수선량 및 유효선량 평가

  • Cho, Jeong-Yeon (Department of Oral and Maxillofacial Radiology, School of Dentistry, Dankook University) ;
  • Han, Won-Jeong (Department of Oral and Maxillofacial Radiology, School of Dentistry, Dankook University) ;
  • Kim, Eun-Kyung (Department of Oral and Maxillofacial Radiology, School of Dentistry, Dankook University)
  • 조정연 (단국대학교 치과대학 구강악안면방사선학교실) ;
  • 한원정 (단국대학교 치과대학 구강악안면방사선학교실) ;
  • 김은경 (단국대학교 치과대학 구강악안면방사선학교실)
  • Published : 2007.09.30
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Abstract

Purpose: The purpose of this study was to measure the absorbed dose and to calculate the effective dose for periapical radiography done by portable intraoral x-ray machines. Materials and Methods: 14 full mouth, upper posterior and lower posterior periapical radiographs were taken by wall-type 1 and portable type 3 intraoral x-ray machines. Thermoluminescent dosemeters were placed at 23 sites at the layers of the tissue-equivalent ART woman phantom for dosimetry. Average tissue absorbed dose and radiation weighted dose were calculated for each major anatomical site. Effective dose was calculated using 2005 ICRP tissue weighted factors. Results: On 14 full mouth periapical radiographs, the effective dose for wall-type x-ray machine was 30 Sv; for portable x-ray machines were 30 Sv, 22 Sv, 36 Sv. On upper posterior radiograph, the effective dose for wall-type x-ray machine was 4 Sv; for portable x-ray machines doses were 4 Sv, 3 Sv, 5 Sv. On lower posterior radiograph, the effective dose for wall type x-ray machine was 5 Sv; for portable x-ray machines doses were 4 Sv, 4 Sv, 5 Sv. Conclusion: Effective doses for periapical radiographs performed by portable intraoral x-ray machines were similar to doses for periapical radiographs taken by wall type intraoral x-ray machines.

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