Laser TLD 2-Dimensional Dose Mapping
- 1 May 1993
- journal article
- Published by Oxford University Press (OUP) in Radiation Protection Dosimetry
- Vol. 47 (1-4) , 457-460
- https://doi.org/10.1093/oxfordjournals.rpd.a081785
Abstract
A new, laser based system has been developed for rapid evaluation of monolithic thermoluminescence dosimetry (TLD) arrays. A precision controlled CO2 laser is used to heat sequentially 1.5 mm diameter, 38 µm thick TLDs, deposited on a 0.125 mm thick polymer substrate in a 3 mm x 3 mm grid. Array areas up to 30 cm x 30 cm are used (>10,000 TLD elements), with evaluation times of 45-90 min, depending on phosphor type. Isodose contours and various anlaysis functions are available on the system operating PC. This system allows for greatly expanded dosimetry compared to standard TLDs. The arrays are re-usable and water immersible. Results from radiation therapy (brachytherapy and external beam) dose measurements, and alpha particle emitting radioactive contamination are given.Keywords
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