Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Monte Carlo Simulation-Based Mammographic Anti-Scatter Grids to Evaluate Performance of Digital Mammography Detector

디지털 맘모 디텍터 성능평가를 위한 몬테카를로용 산란선 제거 그리드 작성에 관한 연구

  • Yeji Kim (Department of Multidisciplinary Radiological Science, The Graduate School of Dongseo University) ;
  • Hyejin Jo (Department of Multidisciplinary Radiological Science, The Graduate School of Dongseo University) ;
  • Yongsu Yoon (Center for Radiological Environment & Health Science, Dongseo University)
  • 김예지 (동서대학교 일반대학원 융합방사선학과) ;
  • 조혜진 (동서대학교 일반대학원 융합방사선학과) ;
  • 윤용수 (동서대학교 방사선보건환경연구센터)
  • Received : 2023.12.26
  • Accepted : 2024.01.08
  • Published : 2024.02.28
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Abstract

In Recent years, there has been a noticeable increase in the global incidence of breast cancer, with approximately 2.3 million cases of female breast cancer reported worldwide in 2020. Numerous studies are currently underway to enhance the accuracy of breast cancer diagnosis through the development of digital mammography detectors. This study aims to create Monte Carlo simulation-based mammographic anti-scatter grids and investigate their utility in evaluating the performance of digital mammography detector. Two types of mammographic anti-scatter grids, MAM-CP and Senographe 600T HF, were created using Monte Carlo simulation software (MCNPX 2.7.0), with grid ratios of 3.7 : 1 and 5 : 1, respectively. The grid physical characteristics (sensitivity, exposure factor, contrast improvement ratio) were calculated based on the KS C IEC60627 in the simulations using two X-ray qualities, RQA-M2 (28 kVp) and MW4 (35 kVp). As the X-ray tube voltage increased from 28 kVp to 35 kVp, sensitivity and exposure factor exhibited a decreasing trend, while contrast improvement ratio demonstrated an increasing trend. With an increase in grid ratio from 3.7 : 1 to 5 : 1, all physical characteristics showed an upward trend. Our results were consistent with a previous study that conducted measurements of physical properties using a real phantom. However, the pattern of change in the contrast improvement ratio with X-ray tube voltage differed from the previous study.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No.2022R1G1A1009477)

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