SU-GG-T-460: Liquid Scintillator Dosimetry for Passive Scattering Proton Beam Quality Assurance

2010 ◽  
Vol 37 (6Part23) ◽  
pp. 3292-3292
Author(s):  
D Robertson ◽  
F Poenisch ◽  
L Archambault ◽  
N Sahoo ◽  
M Gillin ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Proton Beam ◽  
Liquid Scintillator ◽  
Beam Quality ◽  
Passive Scattering

Applications of a novel detector for pencil beam scanning proton therapy beam quality assurance

2021 ◽  
pp. 2140041
Author(s):  
Pei-Ying Yang ◽  
Yang-Wei Hsieh ◽  
Chen-Lin Kang ◽  
Chin-Dar Tseng ◽  
Chih-Hsueh Lin ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Proton Therapy ◽  
Beam Quality ◽  
Beam Width ◽  
Scanning Speed ◽  
Spot Size ◽  
Pencil Beam ◽  
Beam Position ◽  
The Cross ◽  
One Year

This study utilized a new type of detector, the CROSS II (Liverage Biomedical Inc., Taiwan), to perform a beam quality assurance (QA) procedure on a Sumitomo (Sumitomo Heavy Industries, Inc., Japan) pencil beam linear scanning proton therapy machine. The Cross II can monitor proton Pristine Bragg peak range, beam width, beam size, beam position, and scanning speed. All the data presented here were collected during a time span of over one year. The accuracy of the QA program could be verified if all the QA items were tested stably and within the programmed tolerances. Our results showed that the proton range remained within the [Formula: see text] mm tolerance, with the majority of measurements within [Formula: see text] mm, [Formula: see text] mm for spot size, 1.5 mm for spot position, and [Formula: see text]% for scanning speed. We found that the CROSS II detector is in high precise and steady state with highly efficient. Our proton therapy system was also proven to be in an accurate and reliable condition according to our QA results.

Range optimization for target and organs at risk in dynamic adaptive passive scattering proton beam therapy – A proof of concept

2018 ◽  
Vol 56 ◽  
pp. 66-73
Author(s):  
Shunsuke Moriya ◽  
Hidenobu Tachibana ◽  
Kenji Hotta ◽  
Naoki Nakamura ◽  
Takeji Sakae ◽  
...  
Keyword(s):  
At Risk ◽  
Proton Beam ◽  
Organs At Risk ◽  
Proton Beam Therapy ◽  
Proof Of Concept ◽  
Passive Scattering

scholarly journals Monoenergetic proton beam accelerated by single reflection mechanism only during hole-boring stage

2019 ◽  
Vol 7 ◽  
Author(s):  
Wenpeng Wang ◽  
Cheng Jiang ◽  
Shasha Li ◽  
Hao Dong ◽  
Baifei Shen ◽  
...  
Keyword(s):  
Proton Beam ◽  
Radiation Pressure ◽  
Proton Therapy ◽  
Beam Quality ◽  
Acceleration Process ◽  
Carbon Ions ◽  
Triple Layer ◽  
Rear Part ◽  
Beam Instabilities ◽  
Sharp Front

Multidimensional instabilities always develop with time during the process of radiation pressure acceleration, and are detrimental to the generation of monoenergetic proton beams. In this paper, a sharp-front laser is proposed to irradiate a triple-layer target (the proton layer is set between two carbon ion layers) and studied in theory and simulations. It is found that the thin proton layer can be accelerated once to hundreds of MeV with monoenergetic spectra only during the hole-boring (HB) stage. The carbon ions move behind the proton layer in the light-sail (LS) stage, which can shield any further interaction between the rear part of the laser and the proton layer. In this way, proton beam instabilities can be reduced to a certain extent during the entire acceleration process. It is hoped such a mechanism can provide a feasible way to improve the beam quality for proton therapy and other applications.

Strategies for accurate response assessment of radiochromic film using flatbed scanner for beam quality assurance

2019 ◽  
Vol 30 (11) ◽  
Author(s):  
Xu-Dong Zhang ◽  
Yuan-Hao Liu ◽  
Xiao-Bin Tang ◽  
Ming-Chen Hsiao ◽  
Wei-Lin Chen ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Beam Quality ◽  
Response Assessment ◽  
Radiochromic Film ◽  
Flatbed Scanner

scholarly journals Quality assurance procedures based on dosimetric, gamma analysis as a fast reliable tool for commissioning brachytherapy treatment planning systems

2017 ◽  
Vol 51 (4) ◽  
pp. 469-474 ◽  
Author(s):  
Grzegorz Zwierzchowski ◽  
Grzegorz Bieleda ◽  
Janusz Skowronek
Keyword(s):  
Quality Assurance ◽  
Treatment Planning ◽  
Dose Distribution ◽  
Beam Quality ◽  
Calculated Data ◽  
Radiochromic Film ◽  
Film Dosimetry ◽  
Planning Systems ◽  
Treatment Planning Systems ◽  
Gamma Analysis

Abstract Background Fast and easily repeatable methods for commissioning procedures for brachytherapy (BT) treatment planning systems (TPS) are needed. Radiochromic film dosimetry with gamma analysis is widely used in external beam quality assurance (QA) procedures and planar film dosimetry is also increasingly used for verification of the dose distribution in BT applications. Using the gamma analysis method for comparing calculated and measured dose data could be used for commissioning procedures of the newly developed TG-186 and MBDCA calculation algorithms. The aim of this study was dosimetric verification of the calculation algorithm used in TPS when the CT/MRI ring applicator is used. Materials and methods Ring applicators with 26 and 30 mm diameters and a 60 mm intra-uterine tube with 60° angle were used for verification. Gafchromic® EBT films were used as dosimetric media. Dose grids, corresponding to each plane (dosimetric film location), were exported from the TPS as a raw data. Gafchromic® films were digitized after irradiation. gamma analysis of the data were performed using the OMNI Pro I’mRT® system, as recommended by the AAPM TG-119 rapport criterion for gamma analysis of 3%, 3 mm and a level of 95%. Results For the 26 mm and 30 mm rings, the average gamma ranged, respectively, from 0.1 to 0.44 and from 0.1 to 0.27. In both cases, 99% of the measured points corresponded with the calculated data. Conclusions This analysis showed excellent agreement between the dose distribution calculated with the TPS and the doses measured by Gafchromic films. This finding confirms the viability of using film dosimetry in BT.

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