Diagnostic reference levels in intraoral dental radiography in Korea
김은경, 한원정, 최진우, 정연화, 윤숙자, 이재서,
소속 상세정보
김은경 ( Kim Eun-Kyung ) - Dankook University College of Dentistry Department of Oral and Maxillofacial Radiology
한원정 ( Han Won-Jeong ) - Dankook University College of Dentistry Department of Oral and Maxillofacial Radiology
최진우 ( Choi Jin-Woo ) - Dankook University College of Dentistry Department of Oral and Maxillofacial Radiology
정연화 ( Jung Yun-Hoa ) - Pusan National University College of Dentistry Department of Oral and Maxillofacial Radiology
윤숙자 ( Yoon Suk-Ja ) - Chonnam National University School of Dentistry Department of Oral and Maxillofacial Radiology
이재서 ( Lee Jae-Seo ) - Chonnam National University School of Dentistry Department of Oral and Maxillofacial Radiology
KMID : 1024020120420040237
Abstract
Purpose: The objectives of this study were to survey the radiographic exposure parameters, to measure the patient doses for intraoral dental radiography nationwide, and thus to establish the diagnostic reference levels (DRLs) in intraoral dental X-ray examination in Korea. Materials and Methods: One hundred two intraoral dental radiographic machines from all regions of South Korea were selected for this study. Radiographic exposure parameters, size of hospital, type of image receptor system, installation duration of machine, and type of dental X-ray machine were documented. Patient entrance doses (PED) and dose-area products (DAP) were measured three times at the end of the exit cone of the X-ray unit with a DAP meter (DIAMENTOR M4-KDK, PTW, Freiburg, Germany) for adult mandibular molar intraoral dental radiography, and corrections were made for room temperature and pressure. Measured PED and DAP were averaged and compared according to the size of hospital, type of image receptor system, installation duration, and type of dental X-ray machine. Results: The mean exposure parameters were 62.6 kVp, 7.9 mA, and 0.5 second for adult mandibular molar intraoral dental radiography. The mean patient dose was 2.11 mGy (PED) and 59.4 mGycm2 (DAP) and the third quartile one 3.07 mGy (PED) and 87.4 mGycm2 (DAP). Doses at university dental hospitals were lower than those at dental clinics (p<0.05). Doses of digital radiography (DR) type were lower than those of film-based type (p<0.05). Conclusion: We recommend 3.1 mGy (PED), 87.4 mGycm2 (DAP) as the DRLs in adult mandibular molar intraoral dental radiography in Korea.
키워드
Radiation Protection; Radiation Dosage; Radiography; Dental
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