Aluminum oxide doped with carbon and magnesium (Al2O3:C,Mg ) was investigated to use together with immobilization masks used in radiotherapy treatments. In this way, thanks to RPL properties of the Al2O3:C,Mg the masks can be used for patient dosimetry after treatment sessions. Linearity, reproducibility, dose range and uniformity of the Al2O3:C,Mg material create challenges to use this powder in vivo dosimetry. The reading system is also studied to obtain higher sensitivity levels. Irradiated samples were read with Red and UV excitations. UV excitation with further optimized filter set up will be promising for future readings. The coating device can provide homogenous coating layer for samples. In 2D reading tests, reading protocol first optimized and height and surrounding effects were studied. In dose maps and spatial resolution tests the maximum resolution with certain aperture was seen. Increasing resolution with smaller aperture can create problems for sensitivity.
|Qualification||Master of Science|
|Date of Award||8 Sep 2015|
|State||Published - 8 Sep 2015|