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

7. Commissioning, 9. Advanced Dosimetry, 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

7. Commissioning, 9. Advanced Dosimetry, 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

A method to correct for temperature dependence and measure simultaneously dose and temperature using a plastic scintillation detector

5. In Vivo Dosimetry, 9. Advanced Dosimetry, MeV Electron, MV Photon, Fundamental Research Show more

Plastic scintillation detectors work well for radiation dosimetry. However, they show some temperature dependence, and a priori knowledge of the temperature surrounding the plastic scintillation detectors is required to correct for this dependence.

PHYSICS IN MEDICINE & BIOLOGY
F.Therriault-Proulx, L.Wooton, S.Beddar | Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA

Orthovoltage to Monoenergetic Photon Beam Energy Correction Factor for HyperScint Scintillation Dosimeter

9. Advanced Dosimetry, kV Photon, Energy Dependency, Monte Carlo Simulations Show more

The scintillator dosimetry system is a small-field dosimeter with reported energy independence down to 100-keV. This work investigates the energy dependence of the scintillator between a monoenergetic photon source and polyenergetic orthovoltage beam.

2022 AAPM ANNUAL MEETING
B. Insley, D. Bartkoski, L. Che Fru, M. Salehpour | M.D. Anderson Cancer Center, Houston, TX

Dosimetric Characterization of the ARIEL 10 MV X-Ray Ultrahigh Dose-Rate (FLASH) Irradiation Platform at TRIUMF

4. FLASH-RT / UHDR, 9. Advanced Dosimetry, MV Photon, Detector comparaison, Fundamental Research Show more

The purpose was to characterize the beam delivery capabilities and dose rates achievable on the new ultrahigh dose-rate 10MV x-ray irradiation platform at TRIUMF. Beam commissioning and dosimetry have been conducted on the ARIEL x-ray FLASH irradiation platform using film doses and scintillators. Measured dose rates support that the 10MV x-ray beam may be used as a UHDR source compatible with FLASH radiobiological experiments.

2022 AAPM ANNUAL MEETING
N.Esplen (1), L.Egoriti (2), T.Planche (3), A.Hart (1), B.Paley (3), C.Hoehr (3), A.Gottberg (3), M.Bazalova-Carter (1) | 1- University of Victoria, BC ,CA, 2- University of British Columbia, BC, CA, 3- TRIUMF, BC, CA

A Novel Multi-Headed Scintillation Detector for Fast and Efficient Dose Measurements at Multiple Locations Simultaneously

3. Treatment Plan (End-to-End) QA, 9. Advanced Dosimetry, MV Photon, Advanced Optical Dosimetry, Multi-point Dosimetry, Real-time Dosimetry Show more

To develop and quantify the performances of a novel multi-point scintillation detector having multiple heads connected to the same optical line, allowing real-time dose measurements simultaneously at 3 positions in non-contiguous space.

2022 AAPM ANNUAL MEETING
B.Lessard (1,2), Y.Lechasseur (3), S.Lambert-girard (3), F.Therriault-Proulx (3), L.Beaulieu (1,2), L.Archambault (1,2) | 1- Département de physique, génie physique et optique, et Centre de recherche sur le cancer, Université Laval, Québec, CA , 2- CHU de Quebec – Universite Laval, QC, Canada, 3- MEDSCINT, QC, Canada

External beam irradiation angle measurement using Cerenkov emission

8. Cherenkov Dosimetry, 9. Advanced Dosimetry, MV Photon, Advanced Optical Dosimetry, Monte Carlo Simulations Show more

In this study, we propose a novel approach designed to take advantage of the Cerenkov angular dependency to perform a direct measurement of an external beam radiation angle of incidence. The detector offers promising perspectives for external beam radiotherapy and brachytherapy applications.

MEDICAL PHYSICS
E.Jean (1,2,3), S.Lambert-girard (4), F.Therriault-Proulx (4), L.Beaulieu (1,2) | 1- Département de physique, génie physique et optique, et Centre de recherche sur le cancer, Université Laval, QC, Canada, 2- Département de radio-oncologie et Axe Oncologie du CRCHU de Québec, QC, CA, 3- Département de radio-oncologie du CIUSSS-MCQ, CHAUR de Trois-Rivières, QC, Canada, 4- MEDSCINT, QC, Canada

Comparative optic and dosimetric characterization of the HYPERSCINT scintillation dosimetry research platform for multipoint applications

9. Advanced Dosimetry, MV Photon, Detector comparaison, Multi-point Dosimetry Show more

This study introduces the HYPERSCINT research platform (HYPERSCINT-RP100, Medscint Inc., Quebec, Canada), the first commercially available scintillation dosimetry platform capable of multi-point dosimetry through the hyperspectral approach.

Phys Med Biol. 2021
E.Jean (1,2,3), F.Therriault-Proulx (4), L.Beaulieu (1,2) | Département de physique, génie physique et optique, et Centre de recherche sur le cancer, Université Laval, Québec, CA , Département de radio-oncologie et Axe Oncologie du CRCHU de Québec, QC, CA, Département de radio-oncologie du CIUSSS-MCQ, CHAUR de Trois-Rivières, Trois-Rivières, QC, Canada, MedScint, QC, CA

Development of An Automated Routine for Finding the Precise Location of Scintillators Elements and Their Emission Spectrum in a Multi-Point Scintillation Detector

9. Advanced Dosimetry, MV Photon, Multi-point Dosimetry Show more

The goal of this study is to develop an approach allowing for calibration of multi-point scintillation detector (mPSD) using only the photon beam from a linear accelerator such that it doesn’t depend on the availability of other irradiation modalities (e.g. orthovoltage irradiators). This study also aims at determining an experimental method to validate the spatial position of the different scintillators within the mPSD.

2020 AAPM AM
B.Lessard (1,2), F.Larose (1,2), F.Berthiaume (1,2,3), S.Lambert-girard (1,2,3), F.Therriault-Proulx (3), L.Archambault (1,2) | Département de physique, génie physique et optique, et Centre de recherche sur le cancer, Université Laval, Québec, CA , CHU de Quebec – Universite Laval, QC, CA, MedScint, QC, CA

Deformable Scintillation Dosimeter: II. Real-Time Simultaneous Measurements of Dose and Tracking of Deformation Vector Fields

9. Advanced Dosimetry, MV Photon, Custom Probe Development, Multi-point Dosimetry, Real-time Dosimetry Show more

This article introduces a novel deformable dosimeter that can measure the dose distribution and track the deformation of a material during radiotherapy treatments using the HYPERSCINT dosimetry system. The dosimeter is made of an array of 19 scintillating fiber detectors embedded in a cylindrical elastomer matrix. It is imaged by two pairs of stereoscopic cameras that record the position, angulation and dose of the scintillators.

Physics in Medicine & Biology
Emily Cloutier (1,2), Luc Beaulieu(1,2), Louis Archambault (1,2) | 1. Service de physique médicale et Axe Oncologie du Centre de recherche, CHU de Québec-Université Laval, Canada, 2. Département de physique, de génie physique et d’optique, et Centre de recherche sur le cancer, Université Laval, Québec, Canada