Title :
Focussed and unfocussed laser heating of a TLD layer for medical imaging: a comparison case
Author :
Grupen-Shemansky, Melissa E. ; Kearfott, Kimberlee J.
Author_Institution :
Arizona State Univ., Tempe, AZ, USA
Abstract :
Thermoluminescent detectors (TLDs) heated by infrared laser stimulation are discussed. Discrete spots on a relatively large TLD are heated to release dosimetric information with a spatial resolution that depends on laser beam diameter and radial heat conduction. The laser beam is focused to improve spatial resolution and decrease heating time for each spot. Decreasing the laser beam diameter 81.2% increases heating rates as much as 30 times initially and improves spatial resolution in proportion to beam diameter
Keywords :
laser applications in medicine; patient diagnosis; thermoluminescent dosimeters; beam diameter; dosimetric information; focussed laser heating; infrared laser stimulation; laser beam diameter; medical imaging; radial heat conduction; spatial resolution; thermoluminescent detector layer; unfocussed laser heating; Biomedical imaging; Computer aided software engineering; Equations; Focusing; Heating; Laser beams; Laser tuning; Optical materials; Spatial resolution; Surface emitting lasers;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96150
