Beam-transport study of an isocentric rotating ion gantry with minimum number of quadrupoles

Pavlovič, Márius; Griesmayer, E.; Seemann, Rolf

doi:10.1016/j.nima.2005.01.322

Cited by 18 publications

(14 citation statements)

References 19 publications

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“…If the accelerator source has a high capital cost then a multi-room arrangement may be appropriate; if beam switching, verification, treatment time and other issues are taken into consideration, it has been shown that around 3-4 rooms make best Figure 9. A schematic illustration of an isocentric three-dipole gantry (of the so-called 'Pavlovic' design [121]) which incorporates spot scanning magnets upstream of the final (90 • ) dipole. With appropriate beam optics and entrance and exit edge angles, the betatron phase advance of the Twiss functions between the scanning magnets and the isocentre may be made approximately 90 • , creating point-to-parallel transport optics that result in an effectively infinite SAD; this thereby gives the parallel scanning at the patient shown.…”

Section: Delivering Particles To the Patientmentioning

confidence: 99%

Hadron accelerators for radiotherapy

Owen

Mackay

Peach

et al. 2014

Contemporary Physics

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Over the last twenty years the treatment of cancer with protons and light nuclei such as carbon ions has moved from being the preserve of research laboratories into widespread clinical use. A number of choices now exist for the creation and delivery of these particles, key amongst these being the adoption of pencil beam scanning using a rotating gantry; attention is now being given to what technologies will enable cheaper and more effective treatment in the future. In this article the physics and engineering used in these hadron therapy facilities is presented, and the research areas likely to lead to substantive improvements. The wider use of superconducting magnets is an emerging trend, whilst further ahead novel high-gradient acceleration techniques may enable much smaller treatment systems. Imaging techniques to improve the accuracy of treatment plans must also be developed hand-in-hand with future sources of particles, a notable example of which is proton computed tomography.

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Section: Delivering Particles To the Patientmentioning

confidence: 99%

Hadron accelerators for radiotherapy

Owen

Mackay

Peach

et al. 2014

Contemporary Physics

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“…3). Using the GA method to search for winding solutions we parameterized the path on the surface of torus using the relation: (1) n is the number of turns on a complete torus, and are coefficients that determine the multipole field components. The magnetic field inside the torus is numerically evaluated from the windings using the Biot-Savart law and further use to study beam dynamics (with the Differential Algebra code COSY INFINITY [12]) to define the trajectory [13].…”

Section: Winding Parameterization and Optimizationmentioning

confidence: 99%

“…Gantries (see Fig. 1) are rotatable beam-lines that allow the beam to be directed at the patient at any arbitrary angle without having to tilt the patient [1]. At the present time there exists only one carbon therapy gantry at the Heidelberg Ion Therapy Center (HIT) [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Conceptual Design of a 260 mm Bore 5 T Superconducting Curved Dipole Magnet for a Carbon Beam Therapy Gantry

Caspi

Arbelaez

Félice

et al. 2012

IEEE Trans. Appl. Supercond.

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A conceptual design of curved superconducting magnet for a carbon therapy gantry has been proposed. The design can reduce the gantry's size and weight and make it more comparable with gantries used for proton therapy. In this paper we report on a combined function, 5 T, superconducting dipole magnet with a 260 mm bore diameter that is curved 90 degrees at a radius of 1269 mm. The magnet superimposes two layers of oppositely wound and skewed solenoids like windings, energized in a way that nulls the solenoid field and doubles the dipole field component. Furthermore, the combined architecture of the windings can create a selection of field terms that are off the near-pure dipole field. Combined harmonics such as a quadrupole and sextupole are needed to adjust the beam trajectory. Ways to adjust the field and beam trajectory, magnet size and assembly, structure and pre-stress are considered.

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“…Its application requires technological development in the field of accelerator technology [1][2][3], beam transport [4][5][6][7], radiobiology, dosimetry, treatment planning, etc. Many of these development fields are based on the physics of ion interaction with matter, which is tightly connected to the precise knowledge of ion ranges in different biological targets.…”

Section: Introductionmentioning

confidence: 99%

Ranges of protons in biological targets

Pavlovič

Hammerle

2017

Journal of Electrical Engineering

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The paper introduces a simple fitting function for quick assessment of proton ranges in biological targets and human tissues. The function has been found by fitting an extensive data set of Monte Carlo proton ranges obtained with the aid of the SRIM-2013 code. The data has been collected for 28 different targets at 8 energies in the interval from 60 MeV to 220 MeV. The paper shows that at a given kinetic proton-beam energy, the Monte Carlo ranges can be satisfactorily fitted by a power function that depends solely on the target density. This is a great advantage for targets, for which the exact chemical composition is not known, or the mean ionizing potential is not reliably known. The satisfactory fit is meant as the fit that stays within the natural range straggling of the Monte Carlo ranges. In the second step, the energy-scaling yielding a universal fitting formula for proton ranges as a function of proton-beam energy and target density is introduced and discussed. This paper is an extended version of the contribution presented at the APCOM2017 conference.K e y w o r d s: biological targets, proton range, proton therapy, range straggling, SRIM

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Beam-transport study of an isocentric rotating ion gantry with minimum number of quadrupoles

Cited by 18 publications

References 19 publications

Hadron accelerators for radiotherapy

Hadron accelerators for radiotherapy

Conceptual Design of a 260 mm Bore 5 T Superconducting Curved Dipole Magnet for a Carbon Beam Therapy Gantry

Ranges of protons in biological targets

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