Department of Medical Physics and Radiology, Faculty of Paramedical Sciences, Kashan University of Medical Sciences, Kashan, Iran.
Department of Radiology, Faculty of Paramedicine, Tabriz University of Medical Sciences, Tabriz, Iran.
Oral Radiol. 2021 Jan;37(1):80-85. doi: 10.1007/s11282-020-00428-z. Epub 2020 Feb 17.
Although radiation exposure associated with dental radiography is relatively low, patient exposure must be kept practically low. Therefore, it is necessary for each country to establish its own diagnostic reference levels (DRLs) suitable for its equipment and practice. In the present study, dose-width product (DWP) values for panoramic dental radiography were measured and a local DRL was established.
Five panoramic devices from five radiology clinics of Kashan, Iran were selected to measure the DWP values of panoramic dental radiography. To investigate the DWP values, the parameters of each patient's exposure (e.g., tube voltage, tube current, and exposure time) at these five radiology clinics were extracted. Then, the dose value received by each patient was measured based on a CT pencil chamber. Finally, the overall median DWP values for the patients with small, medium, and large sizes were obtained, and these values were considered as the local DRLs for panoramic dental radiography.
A total of 99 adult patients were included in the present study. The findings demonstrated that the median and third-quartile DWP values for these five radiology clinics ranged from 42.3 to 94.3 and 49.7 to 142.8 mGy mm, respectively. The local DRL values, which were established as the overall median DWP values, were 43.4, 52.0, and 80.3 mGy mm for the adults with small, medium, and large sizes, respectively.
The local DRL proposed in this study for the adult with standard/medium size was lower than those proposed by other reports and seemed acceptable for panoramic radiography in Kashan, Iran.
尽管牙科放射摄影相关的辐射暴露相对较低，但患者的辐射暴露必须保持在低水平。因此，每个国家都有必要建立适合本国设备和实践的诊断参考水平（DRL）。在本研究中，测量了全景牙科放射摄影的剂量-宽度乘积（DWP）值，并建立了当地的 DRL。
从伊朗卡尚的 5 个放射科诊所选择了 5 台全景设备来测量全景牙科放射摄影的 DWP 值。为了研究 DWP 值，从这 5 个放射科诊所提取了每个患者的曝光参数（例如管电压、管电流和曝光时间）。然后，根据 CT 铅笔室测量每个患者所接受的剂量值。最后，获得了小、中、大三种体型患者的总体中位数 DWP 值，并将这些值作为全景牙科放射摄影的当地 DRL。
本研究共纳入了 99 名成年患者。研究结果表明，这 5 家放射科诊所的中位数和四分位数三 DWP 值范围分别为 42.3 至 94.3 和 49.7 至 142.8 mGy mm。作为总体中位数 DWP 值建立的当地 DRL 值分别为 43.4、52.0 和 80.3 mGy mm，适用于小、中、大三种体型的成年人。
与其他报告相比，本研究为标准/中等体型成年人提出的当地 DRL 较低，对于伊朗卡尚的全景放射摄影似乎是可以接受的。
