This paper describes an LED-based optically stimulated luminescence (OSL) system for dose profile measurements using OSL detector strips and investigates its performance in x-ray computed tomography (CT) dosimetry. To compensate the energy response of Al2O3:C detectors, which have effective atomic number 11.28, field-specific correction factors were determined two methods: (a) comparing profiles with ionization chamber point (0.3 cm3 chamber) (b) integrated over a 100 mm length long pencil...

In this work we present a methodology and proof of concept to experimentally determine average linear energy transfer (LET) therapeutic proton beams using the optically stimulated luminescence (OSL) small Al(2)O(3):C detectors. Our is based on fact that shape OSL decay curve detectors depends LET radiation field. Thus, one can use curves establish an calibration curve, which in turn permits measurements LET. We performed irradiations at M D Anderson Cancer Center Proton Therapy Center,...

Purpose The extensive use of multislice computed tomography (MSCT) and the associated increase in patient dose calls for an accurate evaluation technique. Optically stimulated luminescence (OSL) dosimetry provides a potential solution to arising concerns over dose. This study was intended evaluate feasibility accuracy OSL dosimeter systems diagnostic CT x‐ray beam energy range. Methods MSCT profiles were measured by irradiating strips placed inside extended PMMA head body phantoms at...

Abstract Calcium sulfate doped with dysprosium (CaSO 4 :Dy) has been used for personal dosimetry using the thermoluminescence (TL) technique decades and its TL properties are well-known. Considering advantages of OSL (relatively simple faster readout detector reusability) potential application CaSO :Dy as an detector, this study aimed to investigate dosimetric technique. The present was carried out pellets prepared at IPEN irradiated read in a TL/OSL Risø reader blue light stimulation Hoya...

Purpose : To measure the linear energy transfer (LET) of therapeutic proton beams using optically stimulated luminescence (OSL) properties commercial Al 2 O 3 :C dosimeters (OSLDs). Method and Materials We irradiated at M. D. Anderson Cancer Center passive scattering nozzles with unmodulated spread‐out Bragg peak (SOBP) beams. The irradiations provided data to determine an LET calibration curve; SOBP tested our curve. OSLDs were readout Oklahoma State University a Riso/ TL/OSL‐DA‐15 reader....

Since its discovery, ionizing radiation has been used in many different applications. Materials and methods have developed to measure quantify doses. Thermoluminescence (TL) Optically Stimulated Luminescence (OSL) are two techniques for dosimetry. Both TL OSL primarily applied several areas, such as dating of ancient materials, equipment quality control individual monitoring. One the parameters knowledge development a technology is number patents related field. In this work, we established...

Recent studies demonstrated that optically stimulated luminescence (OSL) systems allow the evaluation of doses for 2D mapping in a relatively fast and simple way results show submillimeter resolution. This work presents, first time, an dosemeter (OSLD) form film made with CaSO4:Eu particles embedded silicone elastomer matrix. The OSLD was produced using low-cost methodology. is reusable signal can be satisfactorily bleached blue LEDs. main dosimetric properties were evaluated TL/OSL Risø...

Purpose: To characterize optically stimulated luminescence dosimeters (OSLDs) for point measurement in proton therapy and one-dimensional dose profiles of scanning beams. Method Materials: Irradiations were carried out at the M. D. Anderson Proton Therapy Center different conditions: (a) irradiation air with energies from 100 – 250 MeV; (b) irradiations various depth water a pristine Bragg peak; (c) depths Spread Out Peak (SOPB); (d) pencil beam to determine lateral profile. The OSLDs...

Purpose: To demonstrate the feasibility of LED-based Optically Stimulated Luminescence (OSL) system for measuring entire dose profile and to evaluate its reproducibility in CT x-ray energy range. Materials Methods: The OSL strips consisting Al2O3:C powder detector layer incorporated a plastic tape were used. 150 mm long with width 4–5 thickness 0.3 mm. 64-slice profiles measured by irradiating placed inside an extended PMMA head body phantom at different scan conditions varying kVp settings...

Purpose: Optically Stimulated Luminescence (OSL) dosimetry provides a potential solution to the arising dose concerns over MSCT due its high sensitivity re-readability flexible size and ease of use. This study was intended evaluate accuracy reproducibility OSL dosimeter system in CT energy range. Materials Methods: strips with 150-mm long 5-mm wide 0.3-mm thick were used measure index standard PMMA phantoms. The placed cylindrical holder specially designed for this study. All scans performed...

In this work we present a characterization of the response Al2O3:C optically stimulated luminescence dosimeters (OSLDs) to therapeutic proton beams. The following experiments were performed: dose response, energy percentage depth (PDD) profiles un-modulated and modulated beams relative output factors (ROFs). OSLDs readout with optical filters that transmit both F-center UV emission bands from Al2O3:C. We observed was linear in interval doses which had data (0.06 Gy 3.5 Gy). Furthermore,...

Purpose: To demonstrate the feasibility of OSL system for measuring full dose profile and to establish CTDI efficiency factors as reference values compensating underestimation pencil chamber based 100 methodology. Materials Methods: The calibration was first performed using a 0.3 cm 3 Semiflex Chamber. Field‐specific conversion were determined in diagnostic CT energy range. 64‐slice Multi‐Slice (MSCT) profiles measured by irradiating strips placed inside an extended FDA head body dosimetry...