A Few Remarks on Photoluminescence Dosimetry with High Energy X-Rays

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  • Tsuda Masayuki
    Department of Radiological Technology, Tokai University Hospital

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  • few remarks on photoluminescence dosimetry with high energy x rays

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Abstract

The present study investigated the possibility of using PLD (photoluminescence dosimetry) for clinical radiotherapy of absorbed dose. The main parameters which provide desirable dosimetric properties of PLD in high energy x-rays for radiotherapy, such as linearity, fading, and random uncertainty, were studied and the following conclusions were reached. There is good linearity of PLD response to absorbed dose. The PLD response is independent of the x-ray energy and depth in the water phantom. PLD has unique properties, such as a small response dispersion among PLD glasses, reproducibility of measurements, and extremely low fading. Additionally, PLD has a high spatial resolution. It is suitable for exact dose measurement, especially for an extremely small field and/or in the high dose gradient region. Moreover, there is no need for a complicated washing process of PLD glass and PLD can be used to irradiate a bare glass in a water phantom. The PLD system is found to be a suitable dosimeter system for clinical radiotherapy.

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