Fiber-coupled Luminescence Dosimetry in Therapeutic and Diagnostic Radiology

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    Abstract

    Fiber-coupled luminescence dosimetry is an emerging technology with several potentially attractive features of relevance for uses in therapeutic and diagnostic radiology: direct water equivalence (i.e. no significant perturbation of the radiation field in a water phantom or a patient), sub-mm detector size, high dynamic range (below a mGy to several Gy), microsecond time resolution, and absence of electrical wires or other electronics in the dosimeter probe head. Fiber-coupled luminescence dosimetry systems typically consist of one or more small samples of phosphor, e.g. a mg of plastic seintillator, attached to 10-20 m long optical fiber cables of plastic. During irradiation, each dosimeter probe spontaneously emits radioluminescence (RL) in proportion to the dose rate. The luminescence intensity can be detected with photomultiplier tubes, CCD cameras or other highly sensitive photodetectors. Some crystalline phosphors, such as carbon-doped aluminium oxide (Al2O3:C) have the ability to store charge produced in the crystal during irradiation. The stored charge may later be released by fiber-guided laser light under emission of so-called optically stimulated luminescence (OSL). The OSL signal therefore reflects the passively integrated dose. In contrast to thermoluminescence dosimetry, fiber-coupled OSL dosimetry may be performed in vivo while the dosimeter is still in the patient. Within the last few years, several improvements and new applications of these techniques have been published, and the objective of this review is to provide an introduction to this field and to outline some of these new results. Emphasis will be given to applications in medical dosimetry such as in vivo real-time dose verification in brachytherapy and methods aimed for improved quality assurance of linear accelerators.
    Original languageEnglish
    JournalCONCEPTS AND TRENDS IN MEDICAL RADIATION DOSIMETRY
    Volume1345
    Pages (from-to)100-119
    ISSN0094-243X
    DOIs
    Publication statusPublished - 2011
    Event16th International Conference on Solid State Dosimetry - Sydney (AU), 15-18 Sep
    Duration: 1 Jan 2010 → …

    Conference

    Conference16th International Conference on Solid State Dosimetry
    CitySydney (AU), 15-18 Sep
    Period01/01/2010 → …

    Keywords

    • Radiation physics

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