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International Journal of Radiation Research، جلد ۲، شماره ۳، صفحات ۱۲۷-۱۳۳
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عنوان انگلیسی The need for national diagnostic reference levels: Entrance surface dose measurement in intraoral radiography
چکیده انگلیسی مقاله Background: Intraoral radiographies are the most frequent X-ray examinations in humans. According to International Commission on Radiation Protection (ICRP) recommendations, the selection of a diagnostic reference level (DRL) should be specific to a country or region. Critica l organs such as thyroid gland are exposed to X-rays in intraoral radiography and these exposures should be kept as low as reasonably achievable. To assist the development of DRLs for intraoral radiography, a National Radiation Protection Department-sponsored pilot study was carried out. Materials and Methods: Thermoluminescent dosimetry (TLD) is widely acknowledged to be the recommended method for measuring entrance surface doses (ESD). In this study, ESD was measured using LiF thermoluminescent dosimeters (TLD-100) on the skin (either mandibular or maxillary arcs) of 40 patients. Three TLD chips were placed on the skin of each patient. The doses were averaged for each radiography and mean ESD of all patients calculated. Results: The mean ± SD entrance surface dose at the center of the beam on the patients' skin in intraoral radiography was 1.173 ± 0.606 mGy (ranged from 0.01 to 0.40 mGy). The mean ESD for male and female patients were 1.380 ± 0.823, and 1.004 ± 0.258 respectively. No statistically significant difference was found between these means. Despite its necessity, in national level, there is no published data on the diagnostic reference levels for intraoral radiography. However, the results obtained in this study are lower than those reported by investigators in other countries. Conclusion: In IR Iran, due to lack of large scale studies, no diagnostic reference levels have been set for X-ray diagnostic procedures. Due to lack of national diagnostic reference levels, it is not possible to clarify whether in intraoral radiographies any dose reduction techniques are needed. We intend to perform similar nationwide studies to set the diagnostic reference level for intraoral radiography. Iran . J. Radiat. Res., 2004 2 (3): 127-133
کلیدواژه‌های انگلیسی مقاله TLD,entrance surface dose,Intraoral radiography
نویسندگان مقاله s m j مرتضوی | s m j mortazavi
school of medicine, rafsanjan university of medical sciences, rafsanjan, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی رفسنجان (Rafsanjan university of medical sciences)

a شارقی | a shareghi


m غیاثی نژاد | m ghiassi nejad


a کاوسی | a kavousi


m جعفری زاده | m jafari zadeh


f ناظری | f nazeri


h مزدارانی | h mozdarani


نشانی اینترنتی http://www.ijrr.com/browse.php?a_code=A-10-1-68&slc_lang=en&sid=en
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Radiation Biology
نوع مقاله منتشر شده تحقیق بدیع
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