Response of a Radiophotoluminescence Glass Dosimeter to Low Energy X-rays Necessary for Mammography

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概要

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•   New-type radiophotoluminescence (RPL) glass dosimeters, which had thin sensitive layers near their surface, were made for the examination of their response to low energy (15-25 keV) X-rays necessary for mammography. We constructed a laser scanning microscope system for the effective measurement of RPL photons from an X-ray irradiated glass dosimeter. The X-ray sensitive region of the new-type glass dosimeter was near its surface, and moreover a thin X-ray absorption glass filter, whose photon attenuation coefficient was almost the same as the glass dosimeter, was put on the new-type glass dosimeter. These new-type glass dosimeters were irradiated with low energy X-rays and measured results of absorbed dose around their surface layers agreed on the whole with results from photon transport calculations. It was confirmed that RPL glass dosimeters could make a reliable service to the low energy X-ray dosimetry for mammography.

著者

• Kato Yushi

  Division of Electric, Electronic and Information Engineering, Osaka University, Suita, Osaka 565-0871, Japan

• Yamamoto Takayoshi

  Oarai Research Center, Chiyoda Technol Corporation, 3681 Narita-cho, Oarai, Ibaraki 311-1313, Japan

• Sato Fuminobu

  Division of Electric, Electronic and Information Engineering, Osaka University, Suita, Osaka 565-0871, Japan

• Iida Toshiyuki

  Division of Electric, Electronic and Information Engineering, Osaka University, Suita, Osaka 565-0871, Japan

• Kobayashi Hatsumi

  Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University

• Maki Daisuke

  Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University

• Kato Yushi

  Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University

• Hisakado Satoru

  Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University

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