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Evaluation of entrance window deformation in water phantom with window thickness of 5 mm for horizontal beam measurements

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Abstract

This study aimed to evaluate changes in the deformation of the entrance window on a phantom for a horizontal beam geometry with a window thickness of 5 mm. The window deformation over time was measured using a dial indicator for 12 h after water filling. The window deformation was in the range of 0.17–0.37 mm among the three phantoms. The change in deformation over time was found to be 0.06 mm or less 12 h after filling the phantom. For off-center measurements, the maximum difference in variation among the five points in each of the three phantoms was 0.12, 0.11, and 0.07 mm. The window deformation on the phantom for a horizontal beam geometry with the window thickness of 5 mm was considered almost negligible when appropriately used. However, it is important to control the quality of the phantom according to the usage conditions.

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Authors and Affiliations

  1. School of Health Sciences, Fukushima Medical University, 10-6 Sakaemachi, Fukushima City, Fukushima, 960-8516, Japan

    Takahiro Kato

  2. Department of Radiation Physics and Technology, Southern Tohoku Proton Therapy Center, Fukushima, Japan

    Takahiro Kato & Hisanori Sakagami

  3. Radiological Center, University of Fukui Hospital, Fukui, Japan

    Naoki Kinoshita

  4. Department of Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, Aichi, Japan

    Hiroshi Oguchi

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  1. Takahiro Kato
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  2. Hisanori Sakagami
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  3. Naoki Kinoshita
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  4. Hiroshi Oguchi
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Correspondence to Takahiro Kato.

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Kato, T., Sakagami, H., Kinoshita, N. et al. Evaluation of entrance window deformation in water phantom with window thickness of 5 mm for horizontal beam measurements. Radiol Phys Technol 14, 390–395 (2021). https://doi.org/10.1007/s12194-021-00637-z

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  • DOI: https://doi.org/10.1007/s12194-021-00637-z

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