dosimetry of occupational radiation around panoramic x-ray apparatus
نویسندگان
چکیده
background: panoramic imaging is one of the most common imaging methods in dentistry. regarding the side-effects of ionizing radiation, it is necessary to survey different aspects and details of panoramic imaging. in this study, we compared the absorbed x-ray dose around two panoramic x-ray units: pm 2002 cc proline (planmeca, helsinki, finland) and cranex tome (soredex, helsinki, finland). materials and methods: in order to estimate x-ray dose, 15 thermoluminescet dosemeters (tld-100) were placed in 3 semi-circles of 40cm, 80cm and 120cm radii. around each unit, the number of tlds in each semi-circle was 5 with equal intervals. the center of semicircles accords with the patient’s position. each tld was exposed 40 times. these dosemeters were read out with a harshaw model 4000 tld reader (usa). the calibration processing and the reading of dosemeters were performed by the atomic energy organization of iran. results: the mean absorbed dose in three lines of pm 2002 cc proline was 123.2±15.1, 118.0±11.0 and 108.0±9.1 µsv, (p=0.013). the results were 140.4±15.2, 120.2±10.4 and 111.6±11.2 µsv in cranex tome (p=0.208), which reveals no significant difference between two systems. conclusion: there are no significant differences between the mean absorbed dose of surveyed models in panoramic imaging by two units (pm 2002 cc proline and cranex tome). these results were less than occupational exposure recommended by icrp, even at the highest calculated doses.
منابع مشابه
Dosimetry of Occupational Radiation around Panoramic X-ray Apparatus
Background: Panoramic imaging is one of the most common imaging methods in dentistry. Regarding the side-effects of ionizing radiation, it is necessary to survey different aspects and details of panoramic imaging. In this study, we compared the absorbed x-ray dose around two panoramic x-ray units: PM 2002 CC Proline (Planmeca, Helsinki, Finland) and Cranex Tome (Soredex, Helsinki, Finland).<br ...
متن کاملDosimetry of the Very Weak X-radiation Generated in Television Receivers and X-ray Diffraction Apparatus
With many kinds of apparatus in which electron tubes are operated at high voltages, the possiblepresence of very weak, soft Xvradiation, (i.e. Xradiation of low penetrating power) in the neighbourhood must be given due consideration. The question arises in such apparatus as X-ray diffraction equipment, formerly found only in research laboratories but now widely used industrially in inspection a...
متن کاملRadiation measurements around X-ray cabinet systems.
Security personnel who operate X-ray units for the control of hand luggage and personal items at airports are generally not under dosimetric surveillance. A significant increase in the number of inspected items per passenger, due to rigorous air traffic security measures, raises a question of extended exposure of these workers to scattered X-ray radiation. A new approach to investigating direct...
متن کاملDosimetry in x-ray-based breast imaging
The estimation of the mean glandular dose to the breast (MGD) for x-ray based imaging modalities forms an essential part of quality control and is needed for risk estimation and for system design and optimisation. This review considers the development of methods for estimating the MGD for mammography, digital breast tomosynthesis (DBT) and dedicated breast CT (DBCT). Almost all of the methodolo...
متن کاملDosimetry in x-ray-based breast imaging
The estimation of the mean glandular dose to the breast (MGD) for x-ray based imaging modalities forms an essential part of quality control and is needed for risk estimation and for system design and optimisation. This review considers the development of methods for estimating the MGD for mammography, digital breast tomosynthesis (DBT) and dedicated breast CT (DBCT). Almost all of the methodolo...
متن کاملAdvances in kilovoltage x-ray beam dosimetry.
This topical review provides an up-to-date overview of the theoretical and practical aspects of therapeutic kilovoltage x-ray beam dosimetry. Kilovoltage x-ray beams have the property that the maximum dose occurs very close to the surface and thus, they are predominantly used in the treatment of skin cancers but also have applications for the treatment of other cancers. In addition, kilovoltage...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
journal of biomedical physics and engineeringجلد ۲۰۱۲، شماره ۱۲، صفحات ۰-۰
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023