Development of a Dosimetric Personal Monitor Using Plate Imaging to Support Diagnostic Radio Safety

Abstract

Objective: The obligation to use Monitor Personal Dosimetry (MPD) for radiation workers in Indonesia is regulated by Perka Bapeten No. 8/2011. Some of the MPDs that are often used are thermoluminescent dosimeter (TLD) and Film Badge. The problem is that the process of reading the dose is not readable in real time, because it is cumulative. The aim of the study was to formulate an Imaging Plate (IP) material for the detection of radiation sources so that it could show the personnel dose directly in a Computed Radiography (CR) device.
Materials & Methods: The research was conducted by evaluating several alternative materials for Photo Stimulable Phosphorus (PSP), known as IP. The dose estimation is obtained by varying the tube voltage, tube current, and distance. The mathematical formulation is compared with the results of TLD measurements.
Results: Testing of IP materials showed that there were differences in the response of the exposure index to changes in the parameters. Imaging plates as detectors have different sensitivity values in capturing radiation energy that penetrates the material. The difference in this response can be formulated to determine the measured radiation dose in the form of an exposure factor to the IP response of the thorax 92.2%, cranium 90.9%, extremities 93.3%. There is a distance effect on the IP response.

Conclusion: This exposure index formulation can differentiate the radiation dose. IP material can be used as a dosimeter material. The different responses at each exposure, distance, and material penetrated are shown by characteristic curves and exposure index values.