ANALYSIS OF FLUENCE DISTRIBUTION IN RADIOGRAPHY ROOM USING MONTE CARLO SIMULATIONS WITH PHITS

• Main Author: Andarini Herdianti, Inne
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74286
• Institution: Institut Teknologi Bandung

Radiography is a common diagnostic tool that uses X-rays for medical imaging. X-rays are a form of ionizing radiation. X-rays in this radiography can cause potential exposure to patients and medical staff if it exceeds the specified dose limits. Even though the radiation dose used by radiography equipment is relatively small, repeated exposure to radiation or higher doses can cause damage to human body cells. Therefore, to determine the scattered radiation and the rate of radiation exposure. In this study, a simulation of radiation exposure detection was carried out to evaluate the distribution of radiation scattering in the general radiographic imaging room. This simulation used the Particle and Heavy Ion Transport Code System (PHITS) software to create spatial geometry and particle transport by applying the Monte Carlo method. The type of source used is a point source to simplify the problem and estimate the radiation distribution more easily. In this study, the source was directed at three places: the imaging table, inpatient bed, and erect bucky with a source energy of 55 keV. The simulation output is a contour map from the [T-Track] tally parameter. The red flux indicates where the source is activated. Meanwhile, the yellow and green fluxes are secondary radiation found in the imaging room and control console. The radiation exposure rate was determined using tally parameters [T-Track], [T-Point], and survey meter, resulting in radiation exposure rate values still below the NBD value.