Absorbed dose of sensitive organs in maxillofacial region by different radiographic techniques: Panoramic, Waters, Caldwell and cone-beam computed tomography
- سال انتشار: 1396
- محل انتشار: مجله بهداشت دهان و دندان و اپیدمیولوژی دهان و دندان، دوره: 6، شماره: 3
- کد COI اختصاصی: JR_JOHOE-6-3_003
- زبان مقاله: انگلیسی
- تعداد مشاهده: 165
نویسندگان
Associate Professor, Dental Materials Research Center AND Department of Oral and Maxillofacial Radiology, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Professor, Medical Physics Research Center AND Department of Medical Physics, School of Medical Sciences, University of Mashhad, Mashhad, Iran
Medical Physics Research Center AND Department of Medical Physics, School of Medical Sciences, University of Mashhad, Mashhad, Iran
MSc Student, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Private Practice, Mashhad, Iran
چکیده
BACKGROUND AND AIM: Due to increasing use of X-rays in diagnosis and treatment of diseases, this study aimed to measure and compares the absorbed dose in a number of sensitive organs of head and neck in different radiographic techniques.METHODS: Thermoluminescence dosimeter (TLD) and a male equivalent RANDO phantom were used to measure the absorbed dose in organs. The dosimeters were set in certain sites of phantom related to eye, parotid, thyroid gland, occipital area and temporomandibular joint (TMJ). Panoramic and Caldwell techniques with two different exposure conditions as well as Waters technique with three different exposure conditions were performed. Cone-beam computed tomography (CBCT) was applied in low and normal resolutions with different field of view (FOV), and the mean absorbed dose was calculated and compared by the dosimeters related to each of the organs.RESULTS: The panoramic imaging technique revealed the lowest dose for the eyes, but interestingly higher doses for the parotid gland and the occipital area. In total, Waters and Caldwell imaging techniques indicated that the occipital area and the parotid gland absorbed a higher dose than other organs. In the majority of CBCT scans the parotid region received the highest dose. However, during sinus CBCT (both in low-dose and high-dose modes), the TMJ and eye areas absorbed the highest dose. Investigation of the use of thyroid shield on the absorbed dose in this organ in CBCT showed an average ۲۲% reduction in dose.CONCLUSION: In total, panoramic, Waters and Caldwell imaging techniques indicated that the occipital area and the parotid gland absorbed a higher dose than other organs. In the majority of CBCT scans, the parotid region received the highest dose.کلیدواژه ها
Radiation Dosimeters, Absorption, Radiation, Cone-beam computed Tomography, Panoramic radiographyاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.