輻射玻璃劑量計系統之研製及其發光機制探討

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Title:	輻射玻璃劑量計系統之研製及其發光機制探討
Authors:	許世明(Shih-Ming Hsu)
Contributors:	健康照護學院生物醫學影像暨放射科學學系;中國附醫醫學研究部共同實驗室
Keywords:	熱發光劑量計;玻璃劑量計;重複計讀;發光理論;thermoluminescent dosimeter;radiophotoluminescent glass dosimetersystem;read infinitely;principle of radiation measurement
Date:	2009-07-31
Issue Date:	2009-09-01 15:20:27 (UTC+8)
Abstract:	玻璃劑量計發展於 1950 年代，當時的測讀技術無法有效進行激發玻璃內部發光中心以量測輻射劑量值，且玻璃元素對輻射的敏感性亦相當的低；近年來，脈衝紫外雷射光測讀技術的發展，提升玻璃劑量計輻射劑量判讀的準確性。根據計劃主持人已完成之玻璃劑量計偵測輻射特性的先期實驗工作，證實玻璃劑量計對於輻射偵測的特性皆優於熱發光劑量計。計畫共同主持人曾執行新游離輻射玻璃劑量計系統的研製之專題(NSC94-2314-B-010-034 及NSC95-2314-B-010 -015)，為促使該專題更加完備且達到研究品質的精進，因此本研究計劃為延續該專題而設計，在此研究中我們會進行幾個重要的議題：(1)發展新合成元素的玻璃劑量計，(2)玻璃劑量計螢光發光理論的探討，(3)試製玻璃劑量計測讀系統並將自行研製的系統實際應用於臨床輻射劑量的測量。透過本研究的進行，除了可發展一套國人自製的輻射劑量計系統外，更可利用此系統能重新分析訊號的特性，應用於各項以往熱發光劑量計不易實施的臨床放射治療劑量驗證，以增進病人所受輻射劑量的精準性，維持病人在治療後的生活品質。未來玻璃劑量計可能成為輻射劑量監測及量測的最重要工具之一；因此，新合成元素玻璃劑量計的研製與應用是有其必要性的。 The radiophotoluminescent glass dosimeter (GD) was developed in the late 1950s while the reading technology was not sensitive enough to measure the low radiation dose and glass element sensitivity to radiation was also quite low. In recent years, the development of the pulsed UV laser excitation method which had high measurement accuracy was applied to the GD. In comparison with the thermoluminescent dosimeter, the advantages of the radiophotoluminescent glass dosimeter are good reproducibility of readout values, long stability, low energy dependence, better dose linearity and capability of repeatable readouts. There advantages were verified from our pilot study. This project is followed by the previous grant, the development of a new ionizing radiation glass dosimeter system. (NSC94-2314-B-010-034 and NSC 95-2314-B-010-015) In this project, we will (1) develop the new compound GD, (2) to study the principle of radiation measurement, (3) develop the new compound GD readout system and use this GD system to measure the clinical radiation dose. This study can not only establish our own radiophotoluminescent glass dosimeter system but also verify the variety of clinical radiation therapy dose that can ensure the accuracy of the irradiation dose and improve the quality of life after treatment. Glass dosimeter system is most available for personal monitoring, environmental monitoring and clinical application with high accuracy. It could be one of the most important radiation dose measurement instruments in the near future. Therefore, the development the novel compound and application of radiophotoluminescent glass dosimeter system will be very necessary.
Appears in Collections:	[Department of Biomedical Imaging and Radiological Science] Research reports

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