Achieving a realistic design for a superconducting gantry with large momentum acceptance for proton therapy

2021 ◽  
Vol 1015 ◽  
pp. 165773
Author(s):  
Runxiao Zhao ◽  
Bin Qin ◽  
Yicheng Liao ◽  
Xu Liu ◽  
Qushan Chen ◽  
...  
Keyword(s):  
Proton Therapy ◽  
Large Momentum ◽  
Momentum Acceptance

Beam optics of a superconducting proton-therapy gantry with a large momentum acceptance

2019 ◽  
Vol 34 (36) ◽  
pp. 1942024 ◽  
Author(s):  
Konrad P. Nesteruk ◽  
Ciro Calzolaio ◽  
Mike Seidel ◽  
Jacobus M. Schippers
Keyword(s):  
Open Source Software ◽  
Proton Therapy ◽  
Irradiation Time ◽  
Medical Application ◽  
Patient Treatment ◽  
Large Momentum ◽  
Beam Optics ◽  
Simulation Tools ◽  
Iterative Design ◽  
Momentum Acceptance

In proton therapy, the last part of the beam transport system is installed on a rotatable gantry, so that the beam can be aimed at the tumor from different angles. Since such a gantry system consists of many dipole and quadrupole magnets, it is typically a 100–200 tons device of more than 10 m in diameter. The use of superconducting (SC) magnets for proton therapy allows gantries to be significantly lighter and potentially smaller, which is attractive for this medical application. In addition to that, SC combined function magnets enable beam optics with a very large momentum acceptance. The latter can be advantageous for patient treatment, since the irradiation time can then be significantly reduced by avoiding magnet current changes. To design such an achromatic system, we performed precise high-order calculations. To reach the required accuracy and to check consistency of the obtained results, we have used different simulation tools in our iterative design approach. Here, we will describe our beam optics calculations in the code COSY Infinity and particle tracking using OPAL (open source software from PSI) in 3D field maps obtained from detailed magnet calculations performed in Opera. Our method has shown to be advantageous in a complicated beam optics study and it reduces the risk of systematic errors in a design.

scholarly journals The potential of Gantry beamline large momentum acceptance for real time tumour tracking in pencil beam scanning proton therapy

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Giovanni Fattori ◽  
Ye Zhang ◽  
David Meer ◽  
Damien Charles Weber ◽  
Antony John Lomax ◽  
...  
Keyword(s):  
Proton Therapy ◽  
Hot Spots ◽  
Alternative Energy ◽  
Particle Therapy ◽  
Large Momentum ◽  
Energy Regulation ◽  
Pencil Beam ◽  
Beam Scanning ◽  
Pencil Beam Scanning ◽  
Momentum Acceptance

Abstract Tumour tracking is an advanced radiotherapy technique for precise treatment of tumours subject to organ motion. In this work, we addressed crucial aspects of dose delivery for its realisation in pencil beam scanning proton therapy, exploring the momentum acceptance and global achromaticity of a Gantry beamline to perform continuous energy regulation with a standard upstream degrader. This novel approach is validated on simulation data from three geometric phantoms of increasing complexity and one liver cancer patient using 4D dose calculations. Results from a standard high-to-low beamline ramping scheme were compared to alternative energy meandering schemes including combinations with rescanning. Target coverage and dose conformity were generally well recovered with tumour tracking even though for particularly small targets, large variations are reported for the different approaches. Meandering in energy while rescanning has a positive impact on target homogeneity and similarly, hot spots outside the targets are mitigated with a relatively fast convergence rate for most tracking scenarios, halving the volume of hot spots after as little as 3 rescans. This work investigates the yet unexplored potential of having a large momentum acceptance in medical beam line, and provides an alternative to take tumour tracking with particle therapy closer to clinical translation.

An achromatic gantry for proton therapy with fixed-field superconducting magnets

2019 ◽  
Vol 34 (36) ◽  
pp. 1942023 ◽  
Author(s):  
Lucas Brouwer ◽  
Anthony Huggins ◽  
Weishi Wan
Keyword(s):  
Proton Therapy ◽  
Proton Energy ◽  
Superconducting Magnets ◽  
Full Range ◽  
Large Momentum ◽  
Magnet Design ◽  
Fixed Field ◽  
Technical Risks ◽  
Momentum Acceptance ◽  
Novel Concept

A novel concept for a superconducting, fixed-field bending section is presented for use in a proton therapy gantry. The large momentum acceptance of this design allows for treatment over the full proton energy range of 70–220 MeV with fixed field in the superconducting magnets, eliminating the technical risks associated with fast-field ramping to match beam energy changes during treatment. A combined study of beam dynamics and magnet design is shown for such a system in which a simple magnet geometry with straight Nb–Ti racetrack coils is used to produce the desired fields. Particle tracking through this design is compared with clinical requirements for beam spot shape and size at isocenter over the full range of proton energy.

198: Large Momentum Acceptance NS-FFAG superconducting gantry for Carbon Ion Cancer Therapy for PAVIA

2014 ◽  
Vol 110 ◽  
pp. S97
Author(s):  
D. Trbojevic ◽  
B. Parker ◽  
M. Pullia
Keyword(s):  
Cancer Therapy ◽  
Large Momentum ◽  
Carbon Ion ◽  
Momentum Acceptance

A beam optics design of the interaction region for the CEPC single-ring scheme

2019 ◽  
Vol 34 (13n14) ◽  
pp. 1940007 ◽  
Author(s):  
Yiwei Wang ◽  
Xiaohao Cui ◽  
Jie Gao
Keyword(s):  
Interaction Region ◽  
Large Momentum ◽  
Beam Optics ◽  
Interaction Point ◽  
Correction Scheme ◽  
Local Correction ◽  
Single Ring ◽  
Strong Focusing ◽  
Momentum Acceptance ◽  
Optics Design

The interaction region is designed to provide strong focusing at the interaction point. A local correction scheme is adopted to get a large momentum acceptance. The interaction region consists of several modular sections. This paper presents the optics design of each section and its optimization. As an example, the optics design for the CEPC single-ring scheme is presented.

Design of a light and fast energy degrader for a compact superconducting gantry with large momentum acceptance

2020 ◽  
Vol 73 ◽  
pp. 43-47
Author(s):  
Xu Liu ◽  
Wei Wang ◽  
Zhikai Liang ◽  
Runxiao Zhao ◽  
Kaifeng Liu ◽  
...  
Keyword(s):  
Large Momentum ◽  
Momentum Acceptance

scholarly journals Small Large Momentum Acceptance Gantries for Proton and Carbon Cancer Therapy

2016 ◽  
Vol 118 ◽  
pp. S104
Author(s):  
D. Trbojevic ◽  
N. Tsoupas ◽  
Brett Parker ◽  
H. Witte
Keyword(s):  
Cancer Therapy ◽  
Large Momentum ◽  
Momentum Acceptance

scholarly journals A conceptual design of circular Higgs factory

2016 ◽  
Vol 31 (33) ◽  
pp. 1644012 ◽  
Author(s):  
Yunhai Cai
Keyword(s):  
Beam Energy ◽  
Beam Dynamics ◽  
Large Momentum ◽  
Electron Beam Energy ◽  
Additional Challenge ◽  
Beam Lifetime ◽  
Strong Focusing ◽  
Advanced Analysis ◽  
Momentum Acceptance ◽  
Low Emittance

Similar to a super B-factory, a circular Higgs factory (CHF) will require strong focusing systems near the interaction points and a low-emittance lattice in the arcs to achieve a factory luminosity. At electron beam energy of 125 GeV, beamstrahlung effects during the collision pose an additional challenge to the collider design. In particular, a large momentum acceptance at the 2% level is necessary to retain an adequate beam lifetime. This turns out to be the most challenging aspect in the design of a CHF. In this paper, an example will be provided to illustrate the beam dynamics in a CHF, emphasizing the chromatic optics. Basic optical modules and advanced analysis will be presented. Most importantly, we will show that 2% momentum aperture is achievable.

Spot Scanning Based Proton Therapy for Skull Base Meningiomas: Long-Term Results from the Paul Scherrer Institute

2012 ◽  
Vol 73 (S 02) ◽  
Author(s):  
D. Weber ◽  
R. Schneider ◽  
T. Koch ◽  
J. Geismar ◽  
A. Schertler ◽  
...  
Keyword(s):  
Skull Base ◽  
Proton Therapy ◽  
Paul Scherrer Institute ◽  
Long Term Results ◽  
Spot Scanning ◽  
Skull Base Meningiomas ◽  
Paul Scherrer

Proton Therapy of Esthesioneuroblastoma: The UFPTI Experience

Skull Base ◽  
2011 ◽  
Vol 21 (S 01) ◽  
Author(s):  
Robert Malyapa ◽  
William Mendenhall ◽  
Craig McKenzie ◽  
Daniel Yeung ◽  
Zuofeng Li ◽  
...  
Keyword(s):  
Proton Therapy
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