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Development of a wavelength-separated type scintillator with optical fiber (SOF) dosimeter to compensate for the Cerenkov radiation effect
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Title: | Development of a wavelength-separated type scintillator with optical fiber (SOF) dosimeter to compensate for the Cerenkov radiation effect |
Authors: | Ishikawa, Masayori Browse this author →KAKEN DB | Nagase, Naomi Browse this author | Matsuura, Taeko Browse this author →KAKEN DB | Hiratsuka, Junichi Browse this author | Suzuki, Ryusuke Browse this author →KAKEN DB | Miyamoto, Naoki Browse this author →KAKEN DB | Sutherland, Kenneth Lee Browse this author →KAKEN DB | Fujita, Katsuhisa Browse this author | Shirato, Hiroki Browse this author →KAKEN DB |
Keywords: | Cerenkov light removal | plastic scintillator dosimetry | pulse counting mode | SOF dosimeter | Ir-192 brachytherapy |
Issue Date: | Mar-2015 |
Publisher: | Oxford University Press |
Journal Title: | Journal of Radiation Research |
Volume: | 56 |
Issue: | 2 |
Start Page: | 372 |
End Page: | 381 |
Publisher DOI: | 10.1093/jrr/rru106 |
PMID: | 25618136 |
Abstract: | The scintillator with optical fiber (SOF) dosimeter consists of a miniature scintillator mounted on the tip of an optical fiber. The scintillator of the current SOF dosimeter is a 1-mm diameter hemisphere. For a scintillation dosimeter coupled with an optical fiber, measurement accuracy is influenced by signals due to Cerenkov radiation in the optical fiber. We have implemented a spectral filtering technique for compensating for the Cerenkov radiation effect specifically for our plastic scintillator-based dosimeter, using a wavelength-separated counting method. A dichroic mirror was used for separating input light signals. Individual signal counting was performed for high- and low-wavelength light signals. To confirm the accuracy, measurements with various amounts of Cerenkov radiation were performed by changing the incident direction while keeping the Ir-192 source-to-dosimeter distance constant, resulting in a fluctuation of <5%. Optical fiber bending was also addressed; no bending effect was observed for our wavelength-separated SOF dosimeter. |
Rights: | http://creativecommons.org/licenses/by/4.0/ |
Type: | article |
URI: | http://hdl.handle.net/2115/58565 |
Appears in Collections: | 国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc) 保健科学院・保健科学研究院 (Graduate School of Health Sciences / Faculty of Health Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 石川 正純
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