Dosimetric Verification Using Optically Stimulated Luminescence (Osld) Nanodots For Postero-Anterior (Pa) Chest Examinations In Perak Health Clinics
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Date
2021-01
Authors
Saidin, Mohd Tarmizi
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Publisher
Universiti Sains Malaysia
Abstract
The study was conducted to determine the patients dosimetry received in carrying out an X-ray Examination Procedure at the Perak Health Clinic. As a result of this study the Entrance Surface Dose (ESD) measurement of the procedure will be recorded. There are a number of diagnostic procedures implemented at the Health Clinic where most of the cases are for Postero – Anterior (PA) Chest imaging procedures. Therefore, dosimetry measurements for PA Chest imaging procedures will be recorded for the exposure factors used by the radiographer at the Health Clinic. The measurement of the dosimetry ESD will use the Nanodots OSLD (Al2 O3: C) placed on the Perspex phantom with a thickness of 10 cm and recorded in the unit of mGy. Dosimetry ESD units measured using Nanodots OSLD for the PA Chest imaging procedure for the Perak Health Clinic were recorded and reported as mean, median, first and third quartile values. Basically the recorded ESD measurements are found to be lower than the guideline level set for PA Chest X-ray examination in Malaysia as a guide for the Dose Reference Level (DRL) recommended by the Ministry of Health Malaysia is 0.9 mGy and also by the International Atomic Agency (IAEA) is 0.4 mGy. In addtion, research study results is able to determine the ESD value from all clinics will include machines at Health Clinics in Perak based on models such as Shimadzu, Philip, Toshiba, Siemens GE and Bennett Hologic. Measurements using Nanodots OSLD will provide the maximum reading and minimum ESD for each involved clinics. ESD measurement data can be used as reference level for all health clinic as well as to Public Health Division in particular for improving the quality of Health Clinic diagnostic services. In addition to the aspect of radiation protection for patient, the correct technique as well as the ability of x-ray equipment to function efficiently can assist radiographer in the work process of diagnostic services to the patient dose received aspect based on ALARA concepts.There is currently a standard that has been developed through the Malaysian Diagnostic Reference Levels in Medical Imaging (Radiology) published in 2013 and International level through the International Atomic Energy Agency. The results show that the Nanodot OSLD dosimeter measured in the 3rd quartile ESD was 0.271 mGy – 0.368 mGy or 30.11% - 47.89% which less than the recommended Malaysia national guidance level .
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Physics