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Phantom study of layered sensor module for photon-counting BMD detector

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Abstract

In this study, we perform bone mineral density (BMD) calculation by designing a layered sensor module (LSM) that divides high- and low-energy spectra from a single shot of X-rays. Gamma-ray evaluation supports this mechanism; low-energy gamma rays are absorbed in the front detector, whereas high-energy gamma rays are absorbed in the rear detector. In this phantom study, LSM divides a single shot of X-ray into two spectra with different distributions of energy, thereby affording X-ray images with different properties, such as contrast and gray scale. The region of interest (ROI) is classified by the Prewitt operator to sort the pixels for BMD calculation or Rs value. The calculated final value is 1.2051 g/cm2 with a standard deviation (SD) of 0.3690 g/cm2, as obtained from our previous study. An improved SD results from the layered structure with two channels for signal processing, the introduction of Rs value, and the use of Prewitt filter to sort reliable data. Overall, this study displays the feasibility of LSM for BMD calculation with a small error, thereby enabling the diagnosis of osteoporosis with novel mechanism.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. RS-2022-00165164) and by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (20214000000070, Promoting of expert for energy industry advancement in the field of radiation technology).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea

    Jangwon Byun

  2. Marine Radioactivity Monitoring Group, Korea Marine Environment Management Corporation, Busan, 48931, Republic of Korea

    Yonghoon Kim

  3. Department of Health and Safety Science, Korea University, Seoul, 02841, Republic of Korea

    Jiwon Seo, Eunhye Kim & Beomjun Park

  4. Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Republic of Korea

    Jiwon Seo & Beomjun Park

  5. Department of Health and Environmental Science, Korea University, Seoul, 02841, Republic of Korea

    Kihyun Kim & Wonho Lee

  6. Health Science Research Center, Korea University, Seoul, 02841, Republic of Korea

    Ajin Jo

  7. Transdisciplinary Major in Learning Health System, Graduate School, Korea University, Seoul, 02841, Republic of Korea

    Wonho Lee

  8. Department of Applied Physics, Korea University, Korea University, Sejong, 339-700, Republic of Korea

    Hyun Woo Cho & Jichul Seo

  9. Advanced Crystal Material/Device Research Center, Konkuk University, Seoul, 143-701, Republic of Korea

    Beomjun Park

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Byun, J., Kim, Y., Seo, J. et al. Phantom study of layered sensor module for photon-counting BMD detector. Phys Eng Sci Med 46, 1553–1562 (2023). https://doi.org/10.1007/s13246-023-01319-3

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