On the orientation independence of the HYPERSCINT scintillation dosimetry research platform in a MR-linac environment.

MR-LINAC, MV Photon, Adaptive RT, Angular dependancy, Commissioning, Quality Assurance Show more

The purpose of this work was to characterize the HYPERSCINT scintillation dosimetry research platform in a MR-linac environment, particularly with respect to its orientation. This study shows that the HYPERSCINT scintillation dosimetry platform can be used regardless of its orientation in a magnetic field environment. Together with its linearity to dose and dose-rate, the detector shows great promises for development of dosimetry solutions dedicated to the MR-Linac environment.

2022 COMP ANNUAL SCIENTIFIC MEETING
B.Côté (1), B.Raaymakers (2), S.Woodings (2), P.Uijtewaal (2), W.de Vries (2), S.Lambert-girard (1), F.Therriault-Proulx (1), M.Fast (2) | Medscint, Canada (1), UMC Utrecht, Netherland (2)

Pre-clinical and clinical evaluation of the HYPERSCINT plastic scintillation dosimetry research platform for in vivo dosimetry during radiotherapy

In Vivo Dosimetry, MV Photon, Quality Assurance, Real-time Dosimetry Show more

The purpose of this work is to evaluate the HYPERSCINT HS-RP100 scintillation dosimetry research platform designed for clinical quality assurance (QA) for use in in vivo dosimetry measurements. The device correctly detected the treatment error when the heads were intentionally laterally shifted. In three canine clinical patients treated in multiple fractions.

J Appl Clin Med Phys. 2022
I.Schoepper (1), S.Dieterich (2), E.Alonzo Trestrail (3), M.Sean Kent (1) | Department of Radiation Oncology, University of California Davis School of Veterinary Medicine, Davis, California, USA, Department of Radiation Oncology, University of California Davis, Medical Center, Sacramento, California, USA, Pacific Crest Medical Physics, Chico, California, USA

Patient Specific QA for External Beam Radiotherapy Using the HYPERSCINT Plastic Scintillation Detector

Treatment Plan QA, MV Photon, Detector comparaison, Phantom QA, Quality Assurance Show more

Plastic scintillation detectors have interesting dosimetric properties, including small size and energy independence. These advantages make them well suited for VMAT patient-specific QA, either alone or in conjunction with a detector matrix. This work aims to determine if the HYPERSCINT scintillation dosimetry research platform can replace the classic ion chamber in a clinical patient-specific QA workflow.

2020 AAPM AM
M.Goulet | CISSS – Chaudiere-Appalaches, Lévis, QC, CA

Characterization of the HYPERSCINT Dosimetry System for Real-Time Dosimetry Measurements with the Varian TrueBeamLinac

Commissioning, MV Photon, Adaptive RT, Quality Assurance, Real-time Dosimetry Show more

Plastic scintillator/optical fibre dosimetry systems are advantageous due to their near water equivalence, waterproof construction, linear dose response, and good spatial resolution due to their small size. The nanosecond decay times of plastic scintillators enable the possibility of real-time dosimetry. We tested the new HYPERSCINT fibre detector system to determine if, in addition to the expected dose and field size responses, this system can provide real-time dose information. The HYPERSCINT system is suitable after appropriate calibration to be used to measure relative dose delivered in cGy as well as indicate changing dose conditions within 0.3 seconds.

2020 AAPM AM
C.Penner (1,2), C.Hoehr (2), C.Mendez (1), C.Duzenli (1) | BC Cancer, Vancouver, BC, CA, TRIUMF, Vancouver, BC, CA

Investigations of a Novel HyperscintTM Plastic Scintillator Detector and Hyperspectral Analysis Approach in a 74 MeV Proton Beam

Fundamental research, SMALL-FIELD, MV Photon, Proton, Advanced Optical Dosimetry, Fundamental Research Show more

The HYPERSCINT novel plastic scintillator with spectral analysis approach dosimetry system shows potential for dose measurement in a 74 MeV proton beam with negligible stem effect. The Cerenkov free spectrum may be used to facilitate calibration of the device in MV x-ray beams to improve Cerenkov removal and performance in small field dosimetry.

2021 AAPM ANNUAL MEETING
C.Duzenli (1), C.Hoehr (2), C.Belanger-champagne (2, C.Penner (3), V.Strgar (3) | 1- BC Cancer, BC, CANADA, 2- TRIUMF, BC, CANADA, 3- University of British Columbia, BC, CANADA

On the nature of the light produced within PMMA optical light guides in scintillation fiber-optic dosimetry

Advanced Optical Dosimetry, Fundamental research, MeV Electron, MV Photon, Advanced Optical Dosimetry, Cherenkov, Energy Dependency, Fundamental Research Show more

The goal of this study was to evaluate the nature of the stem effect light produced within an optical fiber, to quantify its composition, and to evaluate the efficiency of the chromatic technique to remove the stem effect. The chromatic stem effect removal technique is accurate in most of the situations. However, noticeable differences were obtained between very specific high-energy irradiation conditions. It would be advantageous to implement an additional channel in the chromatic stem effect removal chain or implement a spectral approach to independently remove the Cerenkov and the fluorescence components from the signal of interest. This would increase the accuracy and versatility of the actual chromatic stem effect removal technique.

PHYSICS IN MEDICINE & BIOLOGY
F.Therriault-Proulx (1)(2), L.Beaulieu (2)(3), L.Archambault (2)(3), S.Beddar (4)(1) | 1- Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 2- Département de Physique, de Génie Physique et d’Optique, Université Laval, Québec, Québec, Canada, 3- Département de Radio-Oncologie, Hôtel-Dieu de Québec, Centre Hospitalier Universitaire de Québec, Québec, Canada

Development of a novel multi-point plastic scintillation detector with a single optical transmission line for radiation dose measurement

Fundamental research, In Vivo Dosimetry, Treatment Plan QA, MV Photon, Fundamental Research, Multi-point, Quality Assurance, Real-time Dosimetry Show more

The goal of this study was to develop a novel multi-point plastic scintillation detector capable of measuring the dose accurately at multiple positions simultaneously using a single optical transmission line. This study demonstrates the practical feasibility of multi-point plastic scintillation detector. This type of detector could be very useful for pre-treatment quality assurance applications as well as an accurate tool for real-time in vivo dosimetry.

PHYSICS IN MEDICINE & BIOLOGY
F.Therriault-Proulx, L.Archambault, L.Beaulieu, S.Beddar | Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, Département de Physique, de Génie Physique et d’Optique, Université Laval, Québec, Québec, Canada, Département de Radio-Oncologie, Hôtel-Dieu de Québec, Centre Hospitalier Universitaire de Québec, Québec, Canada

Review of plastic and liquid scintillation dosimetry for photon, electron, and proton therapy

Fundamental research, kV Photon, MeV Electron, MV Photon, Proton, Fundamental Research Show more

While scintillation dosimetry has been around for decades, the need for a dosimeter tailored to the reality of modern radiation therapy-in particular a real-time, water-equivalent, energy-independent dosimeter with high spatial resolution-has generated renewed interest in scintillators over the last 10 years. This topical review is intended to provide the medical physics community with a wide overview of scintillation physics, related optical concepts, and applications of plastic scintillation dosimetry.

PHYSICS IN MEDICINE & BIOLOGY
L Beaulieu (1,2), S Beddar (3,4) | 1- Département de physique, génie physique et optique, et Centre de recherche sur le cancer, Université Laval, Québec, CA , 2- Département de radio-oncologie et Axe Oncologie du CRCHU de Québec, QC, CA, 3- Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 4- The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, USA

Water-equivalent plastic scintillation detectors for high-energy beam dosimetry: II. Properties and measurements

Fundamental research, MeV Electron, MV Photon, Advanced Optical Dosimetry, Fundamental Research Show more

The properties of a new scintillation detector system for use in dosimetry of high-energy beams in radiotherapy have been measured. The most important properties of these detectors are their hgh spatial resolution and their nearly water-equivalence.

PHYSICS IN MEDICINE & BIOLOGY
A.S. Beddar, T.R. Mackie, F.H. Attix | Depanment of Medical Physics, University of Wisconsin Medical School, Madison, Wl, USA

Water-equivalent plastic scintillation detectors for high-energy beam dosimetry: I. Physical characteristics and theoretical consideration

Fundamental research, MeV Electron, MV Photon, Advanced Optical Dosimetry, Fundamental Research Show more

A minimally perturbing plastic scintillation detector has been developed for the dosimetry of high-energy beams in radiotherapy. The detector system consists of two identical parallel sets of radiation-resistant optical fibre bundles, each connected to independent photomultiplier tubes.

PHYSICS IN MEDICINE & BIOLOGY
A.S. Beddar, T.R. Mackie, F.H. Attix | Depanment of Medical Physics, University of Wisconsin Medical School, Madison, Wl, USA