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Use of optically stimulated luminescence dosimeter and radiophotoliminescent glass dosimeter for dose measurement in dual-source dual-energy computed tomography

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Abstract

We aimed to evaluate properties of optically stimulated luminescence dosimeters (OSLDs) and radiophotoluminescent glass dosimeters (RPLDs) used in dual-source dual-energy (DE) computed tomography (DECT) dosimetry. Energy dependence was evaluated in single-energy (SE) and DE modes, and their relative dose responses differed by 3.8% and 6.6% under equivalent effective energy with OSLD and RPLD, respectively. Dose variation was evaluated using coefficients of variation of dose values from 10 dosimeters, and dose variation of OSLD and RPLD in SE mode ranged from 2.1 to 3.0% and from 2.1 to 2.8%, and those in the DE mode were 1.8 and 2.6%, respectively. Dose linearity was evaluated from 1 to 150 mGy, and linear relationships of dose response were observed between the dosimeters and the ionization chamber (correlation coefficients ≥ 0.9991). Angular dependence was evaluated from − 90° to + 90°, and it was smaller in DE mode than in SE mode for OSLD. The normalized response of RPLD was higher at ± 30° and ± 60° and lower at − 90° in SE and DE modes. This study demonstrated both OSLD and RPLD can perform dosimetry in dual-source DECT with small influence of the properties of the dosimeters compared with that in SECT.

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Acknowledgements

We would like to express our gratitude to Mr. Hiroshi Takamatsu of Siemens Healthineers Japan and Mr. Yasuhiro Hirano of Marubun Tsusho, who provided technical assistance with the experiments.

Funding

This work was supported by JSPS KAKENHI Grant Number JP18K07746.

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Authors and Affiliations

  1. Department of Medical Technology, Toyama Prefectural Central Hospital, 2-2-78 Nishinagae, Toyama, Toyama, 930-8550, Japan

    Ayaka Hirosawa, Yusuke Morioka & Masayasu Kitagawa

  2. Department of Quantum Medical Technology, Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 920-0942, Japan

    Ayaka Hirosawa, Yusuke Morioka, Masayasu Kitagawa & Thunyarat Chusin

  3. Department of Quantum Medical Technology, Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 920-0942, Japan

    Kosuke Matsubara & Akihiro Takemura

  4. Department of Radiological Technology, Faculty of Allied Health Sciences, Naresuan University, Muang, Phitsanulok, 65000, Thailand

    Thunyarat Chusin

Authors
  1. Ayaka Hirosawa
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  2. Kosuke Matsubara
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  3. Yusuke Morioka
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  4. Masayasu Kitagawa
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  5. Thunyarat Chusin
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  6. Akihiro Takemura
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Correspondence to Kosuke Matsubara.

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Hirosawa, A., Matsubara, K., Morioka, Y. et al. Use of optically stimulated luminescence dosimeter and radiophotoliminescent glass dosimeter for dose measurement in dual-source dual-energy computed tomography. Phys Eng Sci Med 44, 1311–1319 (2021). https://doi.org/10.1007/s13246-021-01063-6

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  • DOI: https://doi.org/10.1007/s13246-021-01063-6

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