Results 131 to 140 of about 4,599 (171)

A Case Study in Proton Pencil-Beam Scanning Delivery

International Journal of Radiation Oncology Biology Physics, 2010
We completed an implementation of pencil-beam scanning (PBS), a technology whereby a focused beam of protons, of variable intensity and energy, is scanned over a plane perpendicular to the beam axis and in depth. The aim of radiotherapy is to improve the target to healthy tissue dose differential.
Nicolas Depauw, Jacob B Flanz, Hanne M Kooy   +2 more
exaly   +3 more sources

A Framework for Defining FLASH Dose Rate for Pencil Beam Scanning [PDF]

Medical Physics, 2020
PurposeTo develop a method of (a) calculating the dose rate of voxels within a proton field delivered using pencil beam scanning (PBS), and (b) reporting a representative dose rate for the PBS treatment field that enables correspondence between multiple treatment modalities.
Simon Busold, C Clifton Ling, Eric Abel
exaly   +3 more sources

Pencil beam scanning: a dynamical approach to proton therapy

Proceedings IEEE International Symposium on Bio-Informatics and Biomedical Engineering, 2002
Pencil Beam Scanning is a dynamic beam delivery system developed at IBA s.a. for proton therapy. The radiation field necessary to reach in a fast and robust way a prescribed 3D dose distribution is obtained by accurately controlling both the extraction of the beam from a 235 MeV accelerator and the motion of the beam spot thanks to scanning magnets ...
R. Sepulchre, M. Gerard, B. Marchand, D. Prieels, B. Bauvir   +4 more
openaire   +2 more sources

AUTOMATION OF PENCIL BEAM SCANNING PROTON TREATMENT PLANNING FOR INTRACRANIAL TUMOURS

Physica Medica, 2022
To evaluate the feasibility of comprehensive automation of an intra-cranial proton treatment planning.Class solution (CS) beam configuration selection allows the user to identify predefined beam configuration based on target localization; automatic CS (aCS) will then explore all the possible CS beam geometries.
Lorenzo, Placidi, Roberto, Righetto, Claudio, Vecchi, Stefania, Zara, Alessandro, Alparone, Roberto, Moretti, Dante, Amelio, Daniele, Scartoni, Marco, Schwarz   +8 more
openaire   +2 more sources

Contour scanning for penumbra improvement in pencil beam scanned proton therapy

Physics in Medicine & Biology, 2017
Abstract Proton therapy, especially in the form of pencil beam scanning (PBS), allows for the delivery of highly conformal dose distributions for complex tumor geometries. However, due to scattering of protons inside the patient, lateral dose gradients cannot be arbitrarily steep, which is of importance in cases with organs at risk ...
Meier, G., Leiser, D., Besson, R., Mayor, A., Safai, S., Weber, D.C., Lomax, A.J.   +6 more
openaire   +3 more sources

Scanned Carbon Pencil Beams for Tumor Therapy

AIP Conference Proceedings, 2009
At GSI a fully active beam application has been developed for tumor therapy with carbon ions. In this so‐called rasterscan system the tumor volume is typically split into ∼60 slices of iso‐energies taken from a list of 252 energies ranging from ∼90–430 MeV/u (range: 1.8–30.7 cm). The energies can be combined with variable beam diameters and intensities.
A. Gemmel, N. Saito, N. Chaudhri, R. Lüchtenborg, D. Schardt, E. Rietzel, Ch. Bert, Floyd D. McDaniel, Barney L. Doyle   +8 more
openaire   +1 more source

Pencil Beam Scanning System Based On A Cyclotron

AIP Conference Proceedings, 2011
Sumitomo Heavy Industries, Ltd. (SHI) has developed a new pencil beam scanning system (PBS) for proton therapy in collaboration with National Cancer Center Hospital East (NCCHE). Taking advantage of the continuous beam from the cyclotron P235, the line scanning method is employed in order to realize continuous irradiation with high dose rate.
Toshiki Tachikawa, Hideki Nonaka, Yukio Kumata, Teiji Nishio, Takashi Ogino, Floyd D. McDaniel, Barney L. Doyle   +6 more
openaire   +1 more source

Pencil beam scanned protons for the treatment of patients with Ewing sarcoma

Pediatric Blood & Cancer, 2017
AbstractBackgroundFew data exist regarding the clinical outcome of patients with Ewing sarcoma (EWS) treated with pencil beam scanning proton therapy (PT). We report the outcome of children, adolescents and young adults (AYA) treated with PT at the Paul Scherrer Institute.MaterialsThirty‐eight patients (median age, 9.9 years) received a median dose of ...
Damien C. Weber, Fritz R. Murray, Dora Correia, Alessandra Bolsi, Martina Frei‐Welte, Alessia Pica, Antony J. Lomax, Ralf Schneider, Barbara Bachtiary   +8 more
openaire   +3 more sources

A metropolitan area radio system using scanning pencil beams

IEEE Transactions on Communications, 1991
A metropolitan-area radio system that, from a centrally located base station, provides continuously 360 degrees coverage over a large service region is proposed. The base station blankets the service region with a raster of very narrow pencil beams that can be rapidly scanned to any position in synchronism with the switching sequences of a time ...
Anthony S. Acampora, Ta-Shing Chu, Corrado Dragone, Michael J. Gans   +3 more
openaire   +2 more sources

Proton FLASH: passive scattering or pencil beam scanning?

Physics in Medicine & Biology, 2021
Abstract This study focused on a direct comparison of dose delivery efficiency between two proton FLASH delivery modes: passive scattering and pencil beam scanning (PBS). Monte-Carlo simulation of the beamline was performed using the Geant4 package. Two proton energies (63 and 230 MeV) were selected, targeting for
Guoliang Zhang, Junliang Wang, Yuenan Wang, Hao Peng   +3 more
openaire   +2 more sources