Kim Eun-Kyung, Han Won-Jeong, Choi Jin-Woo, Jung Yun-Hoa, Yoon Suk-Ja, Lee Jae-Seo
Department of Oral and Maxillofacial Radiology, Dankook University College of Dentistry, Cheonan, Korea.
Imaging Sci Dent. 2012 Dec;42(4):237-42. doi: 10.5624/isd.2012.42.4.237. Epub 2012 Dec 23.
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.
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.
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 mGycm(2) (DAP) and the third quartile one 3.07 mGy (PED) and 87.4 mGycm(2) (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).
We recommend 3.1 mGy (PED), 87.4 mGycm(2) (DAP) as the DRLs in adult mandibular molar intraoral dental radiography in Korea.
本研究的目的是调查口腔内牙科放射摄影的射线照相曝光参数，测量全国范围内口腔内牙科放射摄影的患者剂量，从而建立韩国口腔内牙科X线检查的诊断参考水平（DRLs）。
本研究从韩国所有地区选取了102台口腔内牙科射线照相机器。记录了射线照相曝光参数、医院规模、图像受体系统类型、机器安装时长以及牙科X线机类型。使用剂量面积乘积仪（DIAMENTOR M4-KDK，PTW，德国弗莱堡）在X线设备出口锥末端对成人下颌磨牙口腔内牙科放射摄影的患者入口剂量（PED）和剂量面积乘积（DAP）进行了三次测量，并对室温及压力进行了校正。根据医院规模、图像受体系统类型、安装时长以及牙科X线机类型，对测量得到的PED和DAP进行平均并比较。
成人下颌磨牙口腔内牙科放射摄影的平均曝光参数为62.6 kVp、7.9 mA和0.5秒。平均患者剂量为2.11 mGy（PED）和59.4 mGycm²（DAP），第三四分位数剂量为3.07 mGy（PED）和87.4 mGycm²（DAP）。大学牙科医院的剂量低于牙科诊所（p<0.05）。数字放射摄影（DR）类型的剂量低于基于胶片类型的剂量（p<0.05）。
我们建议将3.1 mGy（PED）、87.4 mGycm²（DAP）作为韩国成人下颌磨牙口腔内牙科放射摄影的DRLs。
