npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041
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Research Paper

New Phys.: Sae Mulli 2020; 70: 841-845

Published online October 30, 2020 https://doi.org/10.3938/NPSM.70.841

Copyright © New Physics: Sae Mulli.

Optimization of Pinhole Collimator According to Magnification Imaging for Radiation Disaster Monitoring: Monte Carlo Simulation

Jong-Hun WON1, Dong-Hee HAN1, Seung-Jae LEE2, Hak-Jae LEE3, Cheol-Ha BAEK4*

1Department of Health Medical Science, Kangwon National University, Samcheok 25949, Korea

2Department of Radiological Science, Dongseo University, Busan 47011, Korea
3ARALE LAB Inc, Seoul 02850, Korea
4Department of Radiological Science, Kangwon National University, Samcheok 25949, Korea

Correspondence to:baekch100@gmail.com

Received: July 24, 2020; Revised: August 2, 2020; Accepted: August 2, 2020

Abstract

A gamma camera system using a pinhole collimator is used to locate a large area such as that of a radiation disaster. However, the existing pinhole collimators have difficulty in determining the correct position because the rotation radius and the magnification are fixed. The purpose of this study was to use Monte Carlo simulations to optimize the pinhole collimator of a gamma camera with magnification images for radiation monitoring. The sensitivity and the resolution were simulated for various the hole diameters and channel heights. This allowed the optimal design variables for each magnification were optimized between 3.5 and 4.5 mm for magnifications from 1.0 to 3.0. The simulation results allowed us to determine the optimal values of the hole diameter and the channel height, which was be 4 mm and 4 mm, respectively. These results demonstrated that the pinhole collimator designed in this study can be utilized to create a disaster radiation-monitoring system.

Keywords: Disaster Radiation Monitoring, Pinhole Collimator, Monte Carlo Simulation

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