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Open AccessDissertation10.25439/rmt.27579408

Implementing a new optically stimulated luminescence dosimetry system

Clement F. Conheady-2014-07-04-RMIT Research Repository (RMIT University Library)
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TL;DRAbstract

This project documents the attempted implementation of a new optically stimulated luminescence (OSL) system. The system comprised aluminium oxide OSLDs (without cassettes) and a reader. The primary aim was to improve upon the reader’s simple internal dose calculation. The secondary aim was to uncover practical considerations which would guide the safe and accurate use of the OSLD system in the clinic. <br>The reader’s internal dose calculation assumed a linear relationship between reader dose and delivered dose. The assumed gradient was found in the dose report for each read routine, the intercept was found by observing a read routine in engineering mode. The gradient and intercept were required to obtain the raw signal.<br>The relationship between raw signal and delivered dose for the OSL system is linear below 4 Gy and progressively more sub-linear above 4 Gy. A non-linearity correction has been estimated and can be applied to the raw signal of each OSLD. <br>The response of the OSL

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This project documents the attempted implementation of a new optically stimulated luminescence (OSL) system. The system comprised aluminium oxide OSLDs (without cassettes) and a reader. The primary aim was to improve upon the reader’s simple internal dose calculation. The secondary aim was to uncover practical considerations which would guide the safe and accurate use of the OSLD system in the clinic. <br>The reader’s internal dose calculation assumed a linear relationship between reader dose and delivered dose. The assumed gradient was found in the dose report for each read routine, the intercept was found by observing a read routine in engineering mode. The gradient and intercept were required to obtain the raw signal.<br>The relationship between raw signal and delivered dose for the OSL system is linear below 4 Gy and progressively more sub-linear above 4 Gy. A non-linearity correction has been estimated and can be applied to the raw signal of each OSLD. <br>The response of the OSL

Keywords

Optically stimulated luminescenceLuminescenceDosimetryAluminum oxideMaterials scienceComputer scienceOpticsOptoelectronics

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