Using the optically stimulated luminescence technique for one- and two-dimensional dose mapping: a brief review

Gasparian, P; Malthez, Anna Luiza Metidieri Cruz; Rodrigues, Letícia Lucente Campos

doi:10.1088/1361-6560/ac9030

Cited by 5 publications

(3 citation statements)

References 84 publications

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“…The surface dose measurements were performed using MyOSLchip (RadPro International GmbH, Germany) OSLDs, composed of a 4.7 mm × 4.7 mm × 0.5 mm Beryllium Oxide (BeO) square chip and enclosed in a 9.5 mm × 10 mm × 2 mm plastic housing fabricated using an acrylonitrile-butadiene-styrene (ABS) material (Sommer, Henniger 2006, Richter et al 2019, Gasparian et al 2022, RadPro 2022. The effective atomic number of BeO material is 7.2, near tissue equivalent, with a nominal density of 2.85 g cm −3 .…”

Section: In Vivo Surface Dose Measurementmentioning

confidence: 99%

Novel framework for determining TPS-calculated doses corresponding to detector locations using 3D camera in in vivo surface dosimetry

Sheen

Park²,

Cho³

et al. 2023

Phys. Med. Biol.

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Purpose: To address the shortcomings of current procedures for evaluating the measured-to-planned dose agreement in in-vivo dosimetry (IVD), this study aimed to develop an accurate and efficient novel framework to identify the detector location placed on a patient's skin surface using a 3D camera and determine the planned dose at the same anatomical position corresponding to the detector location. Methods: Breast cancer treatment was simulated using an anthropomorphic adult female phantom (ATOM 702-D; CIRS, Norfolk, VA, USA). An optically stimulated luminescent dosimeter was used for surface dose measurements (MyOSLchip, RadPro International GmbH, Germany) at six IVD points. Three-dimensional surface imaging (3DSI) of the phantom with the detector was performed in the treatment position using a 3D camera. The developed framework, iSMART, was designed to import 3DSI and treatment planning data for determining the position of the IVD detectors in the 3D treatment planning DICOM image. The clinical usefulness of iSMART was evaluated in terms of accuracy and efficiency, for comparison with the results obtained using cone-beam computed tomography (CBCT) image guidance. Results: The relative dose difference between the planned doses determined using iSMART and CBCT images displayed similar accuracies (within approximately ±2.0%) at all detector locations. The relative dose differences between the planned and measured doses at the six detector locations ranged from –4.8% to 3.1% for the CBCT images and –3.5% to 2.1% for iSMART. The total time required to read the planned doses at six detector locations averaged at 8.1 and 0.8 min for the CBCT images and iSMART, respectively. Conclusions: The proposed framework can improve the robustness of IVD analyses and aid in accurate and efficient evaluations of the measured-to-planned dose agreement.

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Section: In Vivo Surface Dose Measurementmentioning

confidence: 99%

Novel framework for determining TPS-calculated doses corresponding to detector locations using 3D camera in in vivo surface dosimetry

Sheen

Park²,

Cho³

et al. 2023

Phys. Med. Biol.

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“…Recently, a successful approximation of skin-dose measurements using OSL point detectors in vivo was demonstrated, showing the potential for future clinical use [5]. Using point dosimeters has however been shown to be time-consuming and associated with poor spatial resolution and complicated procedures [5][6]. However, by producing OSL area detectors as films, OSL systems have shown potential for evaluating doses for 2D mapping relatively quickly and simply, with much better spatial resolution [7][8], and a large-area (20 cm x 18 cm) 2D OSL film has previously been developed showing the potential for a IOP Publishing doi:10.1088/1742-6596/2799/1/012002 2 2D dosimeter based on OSL [9].…”

Section: Introductionmentioning

confidence: 99%

Reusable optically stimulated luminescence dosimetry films for 2D dose verification of proton therapy

Clausen,

Jensen,

Nielsen

et al. 2024

J. Phys.: Conf. Ser.

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Accurate surface-dose measurements in proton therapy are challenging and often of poor spatial resolution for most dosimeter types. However, optically stimulated luminescence (OSL) based 2D dosimeters could provide the required spatial dose resolution. The aim of this study was to investigate the dosimetric precision and energy dependence of an in-house made reusable dosimeter composed of a silicone-film containing OSL-active nanoparticles. The dosimeter was irradiated with a clinical proton therapy field and the readout dose was compared to the results from a commercial dosimeter. The pixelwise noise-to-signal ratio for the OSL dosimeter remained below 2% for doses above 1 Gy, and the energy dependence was negligible in the investigated energy range.

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“…The excited carriers can now recombine radiatively and the resulting OSL can be measured and correlated to the number of occupied traps and consequently, the deposited dose 13 . Various materials have been studied for OSL‐based dosimetry, 14,15 and commercial systems for investigation of time‐resolved OSL has existed for decades 16 . To retrieve spatial information, OSL‐active particles have successfully been embedded in host matrices and read out in 2D using either an imaging system 17,18 or the combination of a scanning laser and a photomultiplier tube 19,20 .…”

Section: Introductionmentioning

confidence: 99%

High‐resolution three‐dimensional dosimetry in clinically relevant volumes utilizing optically stimulated luminescence

Jensen,

Julsgaard,

Turtos

et al. 2023

Medical Physics

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BackgroundThe continued development of new radiotherapy techniques requires dosimetry systems that satisfy increasingly rigorous requirements, such as high sensitivity, wide dose range, and high spatial resolution. An emerging requirement is the ability to read out doses in three dimensions (3D) with high precision and spatial resolution. A few dosimetry systems with 3D capabilities are available, but their application in a clinical workflow is limited for various reasons, primarily originating from their chemical nature. The search for a 3D dosimetry system with potential for clinical implementation is thus ongoing.PurposeTo demonstrate the capabilities of a novel optically‐stimulated‐luminescence (OSL)‐based 3D dosimetry system capable of measuring radiation doses in clinically relevant volumes.MethodsA laser‐based readout system was used to measure dose distributions delivered by both photons and protons, utilizing the OSL from a mm3YSO:Ce crystal. A homogeneous treatment plan consisting of two opposing photon fields was used to establish an inhomogeneity correction map of the crystal response and demonstrated the accuracy and precision of the system. The crystal was additionally irradiated with a photon treatment plan consisting of three overlapping 10 × 10 mm2fields delivered from different angles, and a proton treatment plan consisting of four pencil beams with energies 90 MeV (× 2), 115 MeV, and 140 MeV. The system abilities were quantified by comparing the 3D‐resolved measurements to Monte Carlo simulations.ResultsThe dose map reproducibility of the system was found to be within 2% including both statistical and systematic errors. The measurements yielded integrated doses from a volume of mm3with voxel volumes of just mm3. An excellent agreement between the 3D‐resolved measurements and the simulations was found for both photon‐ and proton‐irradiation.ConclusionsThe capabilities of the devised system for measuring clinically relevant fields of photons and proton pencil beams within a clinically relevant volume were demonstrated. The system poses as a promising candidate for clinical applications, and enables future research in the field of OSL‐based tissue‐equivalent 3D dosimetry.

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Using the optically stimulated luminescence technique for one- and two-dimensional dose mapping: a brief review

Cited by 5 publications

References 84 publications

Novel framework for determining TPS-calculated doses corresponding to detector locations using 3D camera in in vivo surface dosimetry

Novel framework for determining TPS-calculated doses corresponding to detector locations using 3D camera in in vivo surface dosimetry

Reusable optically stimulated luminescence dosimetry films for 2D dose verification of proton therapy

High‐resolution three‐dimensional dosimetry in clinically relevant volumes utilizing optically stimulated luminescence

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