Assessment of Radiation Exposure of Head and Neck during Panoramic Radiography in Different Age Groups

Abstract

Background and aim: Panoramic imaging is one of the most commonly used imaging techniques in dentistry.Being able to accurately assess the radiation dose patients receive during procedures is a crucial step in the management of dose. The main objective of this study was to evaluate the head and neck skin absorbed dose during panoramic radiography in different age groups with panoramic machine of Oral and Maxillofacial Radiology section of Babol school of dentistry. Materials and methods: 273 thermoluminescent dosemeters (TLDs) (100 LiF: Mg, Ti , harshaw, USA) were used.90 samples were selected from the patients who referred to the Oral and Maxillofacial Radiology section of Babol school of dentistry for panoramic radiography. .Samples divided in 3 age_ group: 4_ 10 years, 10_40 years and above 40 years . TLDs were calibrated in dosimetry laboratory, National Radiation Protection Department. Thermoluminescent signal was read out with a Harshaw 4500 (Harshaw, Bicron USA) reader. Mean and standard deviation was determined by SPSS10 software and ANOVA statistic analysis. Results: Mean ± SD of skin absorbed dose of head and neck for 90 patients was 0.47± 0.09mGy. Conclusions: Since Diagnostic Reference level (DRL) of panoramic imaging is unknown in Iran, there is no possibility to compare the current results with DRL. However, This study conclude that decrease of radiation dose seems to be achievable with lower exposure condition with the panoramic unit.

Assessment of Absorbed Radiation Dose of Some Soft and Hard Oral Tissues after Panoramic and Cone Beam CT Radiograph

“…Together with the reviewed evaluations of organ-specific sensitivity, the salivary gland and Oral mucosa doses will have a main influence on the effective dose (14) . Contrary to the results of the present study, another study (16) show that, utmost of the skin absorption dose goes to parotid was (0.23 ± 0.15 mGy) using panorama.…”

“…On the other hand, CBCT has been commonly used in dental clinics since more than ten years. The radiation dose to the patient is also becoming a main concern, despite the fact that the profits of CBCT have been reported generally (1,16) .…”

“…That's because the point of the radiation dose which received from a panoramic radiograph by means of a Well Collimated x -ray beam is movable around the patient then has variability. Thus, the scattered radiation dose is reliant on patient anatomy plus the imaging geometry (16,37) . The epidemiological studies on a possible association (478) Aya K. Talha, et al…”

Estimating the radiation surface dose and measuring the dose area product to provide the diagnostic reference level in panoramic radiography

“…It is obvious that the mean skin dose values in the present study are lower than those identified in Lorestan province (19) and Mashhad city (6) . But, these numbers are higher compared to Isfahan (20) and Babol cities (21) . The differences can be related to the use of various exposure factors during the panoramic examinations.…”

Measurement of Entrance Skin Dose and the Dose Received by Different Organs in Panoramic Dental Imaging

“…Thus, measuring the dose delivered to patients in various radiographic tests and optimizing the image quality, and dose to reduce the risk of radiation exposure are very important. Thermoluminescence dosimetry has always been one of the effective dosimetry methods for estimating doses in diagnostic radiology, nuclear medicine and radiotherapy [14][15][16][17][18][19][20]. The purpose of this study is to estimate the entrance skin dose and the doses received by various organs in OPG imaging.…”