Temporal separation of Cerenkov radiation and scintillation using a clinical LINAC and artificial intelligence

Madden, Levi; Archer, James; Li, Enbang; Wilkinson, Dean; Rosenfeld, Anatoly B.

doi:10.1088/1361-6560/aae938

Cited by 9 publications

(5 citation statements)

References 21 publications

(31 reference statements)

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“…The tips of the PSD and reference probes were coated in black paint to prevent visible light from entering either of the probes. For measurements with the PSD, an optical fiber housing was used to hold the PSD and reference probes consisting of a 1 cm thick sheet of perspex with a 2.2 mm wide, 4.4 mm deep housing groove machined into the perspex, matching the housing used by and Madden et al 2018aMadden et al , 2018b. The housing groove was filled with ultrasound gel (Aquasonic 100 by Parker Laboratories, INC) with the PSD and reference probe placed in the housing groove to eliminate air gaps between the optical fibers and perspex in the housing groove.…”

Section: Methodsmentioning

confidence: 99%

First measurements with a plastic scintillation dosimeter at the Australian MRI-LINAC

Madden

Archer

et al. 2019

Phys. Med. Biol.

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MRI-LINACs combine MRI and LINAC technologies with the potential for image guided radiation therapy with optimal soft-tissue contrast. In this work, we present the advantages and limitations of plastic scintillation dosimeters (PSDs) for relative dosimetry with MRI-LINACs. PSDs possess many desirable qualities, including magnetic field insensitivity and irradiation angle independence, which are expected to make them suitable for dosimetry with MRI-LINACs. An in-house PSD was used to measure field size output factors as well as a percent depth dose distribution and the beam quality index TPR20/10 at a [Formula: see text] cm2 field size. Measurements were repeated with a Scanditronix/Wellhofer FC65-G ionisation chamber and PTW 60019 microDiamond detector for comparison. Relative differences were calculated between the three detectors, where the mean difference in dose was 1.2% between the PSD and ionisation chamber, 1.9% between the PSD and microDiamond detector and 1.3% between the microDiamond detector and the ionisation chamber. The closeness between the three mean differences in doses suggests that PSDs are feasible for relative dosimetry with MRI-LINACs.

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Section: Methodsmentioning

confidence: 99%

First measurements with a plastic scintillation dosimeter at the Australian MRI-LINAC

Madden

Archer

et al. 2019

Phys. Med. Biol.

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“…It is worth mentioning that some recent research on artificial intelligence (AI) methods and machine learning methods are used to improve situational awareness, accuracy of data analysis, and control of fiber radiation systems [29,30]. Meanwhile, the neural network type AI can be trained to estimate the radiation in the temporal response, permitting the fiber radiation sensors to be applicable for dosimetry in real time [31].…”

Section: Fundamentals Of Optical Fiber-based Radiation Sensingmentioning

confidence: 99%

Recent Advances in Optical Fiber Enabled Radiation Sensors

Zhang

Xiang

Wang

et al. 2022

Sensors

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Optical fibers are being widely utilized as radiation sensors and dosimeters. Benefiting from the rapidly growing optical fiber manufacturing and material engineering, advanced optical fibers have evolved significantly by using functional structures and materials, promoting their detection accuracy and usage scenarios as radiation sensors. This paper summarizes the current development of optical fiber-based radiation sensors. The sensing principles of both extrinsic and intrinsic optical fiber radiation sensors, including radiation-induced attenuation (RIA), radiation-induced luminescence (RIL), and fiber grating wavelength shifting (RI-GWS), were analyzed. The relevant advanced fiber materials and structures, including silica glass, doped silica glasses, polymers, fluorescent and scintillator materials, were also categorized and summarized based on their characteristics. The fabrication methods of intrinsic all-fiber radiation sensors were introduced, as well. Moreover, the applicable scenarios from medical dosimetry to industrial environmental monitoring were discussed. In the end, both challenges and perspectives of fiber-based radiation sensors and fiber-shaped radiation dosimeters were presented.

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“… 3 , 4 They characterized their plastic scintillator dosimeter and measured basic beam data in radiotherapy, such as the percentage depth dose (PDD). From then on, research on a scintillation dosimeter had shown a steady rise with a focus on the scintillator material, 5 , 6 development of the photodetector, 7 , 8 , 9 innovation on the optical guide, 10 , 11 elimination of the stem effect, 12 , 13 , 14 and the dimension of measurements. 15 , 16 Plastic scintillator dosimeters have been used to tackle complex and advanced dosimetry challenges in radiotherapy, such as the small field, 16 particle therapy, 17 magnetic influence, 18 and ultra‐high dose rate.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of determining external beam radiotherapy dose using LuSy dosimeter

Wahabi,

Wong,

Mahdiraji

et al. 2024

J Applied Clin Med Phys

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IntroductionRadiation dose measurement is an essential part of radiotherapy to verify the correct delivery of doses to patients and ensure patient safety. Recent advancements in radiotherapy technology have highlighted the need for fast and precise dosimeters. Technologies like FLASH radiotherapy and magnetic‐resonance linear accelerators (MR‐LINAC) demand dosimeters that can meet their unique requirements. One promising solution is the plastic scintillator‐based dosimeter with high spatial resolution and real‐time dose output. This study explores the feasibility of using the LuSy dosimeter, an in‐house developed plastic scintillator dosimeter for dose verification across various radiotherapy techniques, including conformal radiotherapy (CRT), intensity‐modulated radiation therapy (IMRT), volumetric‐modulated arc therapy (VMAT), and stereotactic radiosurgery (SRS).Materials and methodsA new dosimetry system, comprising a new plastic scintillator as the sensing material, was developed and characterized for radiotherapy beams. Treatment plans were created for conformal radiotherapy, IMRT, VMAT, and SRS and delivered to a phantom. LuSy dosimeter was used to measure the delivered dose for each plan on the surface of the phantom and inside the target volumes. Then, LuSy measurements were compared against an ionization chamber, MOSFET dosimeter, radiochromic films, and dose calculated using the treatment planning system (TPS).ResultsFor CRT, surface dose measurement by LuSy dosimeter showed a deviation of ‐5.5% and ‐5.4% for breast and abdomen treatment from the TPS, respectively. When measuring inside the target volume for IMRT, VMAT, and SRS, the LuSy dosimeter produced a mean deviation of ‐3.0% from the TPS. Surface dose measurement resulted in higher TPS discrepancies where the deviations for IMRT, VMAT, and SRS were ‐2.0%, ‐19.5%, and 16.1%, respectively.ConclusionThe LuSy dosimeter was feasible for measuring radiotherapy doses for various treatment techniques. Treatment delivery verification enables early error detection, allowing for safe treatment delivery for radiotherapy patients.

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Temporal separation of Cerenkov radiation and scintillation using a clinical LINAC and artificial intelligence

Cited by 9 publications

References 21 publications

First measurements with a plastic scintillation dosimeter at the Australian MRI-LINAC

First measurements with a plastic scintillation dosimeter at the Australian MRI-LINAC

Recent Advances in Optical Fiber Enabled Radiation Sensors

Feasibility of determining external beam radiotherapy dose using LuSy dosimeter

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