Results 171 to 180 of about 1,800,736 (210)

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, Alexei V Trofimov, Hanne M Kooy   +2 more
exaly   +3 more sources

Characterization of proton pencil beam scanning and passive beam using a high spatial resolution solid-state microdosimeter

Medical Physics, 2017
This work aims to characterize a proton pencil beam scanning (PBS) and passive double scattering (DS) systems as well as to measure parameters relevant to the relative biological effectiveness (RBE) of the beam using a silicon on insulator (SOI ...
Anatoly Rosenfeld, Marco Petasecca, Aimee McNamara   +2 more
exaly   +1 more source

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

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

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

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

Investigating beam matching for multi-room pencil beam scanning proton therapy

Physical and Engineering Sciences in Medicine, 2020
The purpose of this study was to investigate the proton beam matching for a multi-room ProteusPLUS pencil beam scanning (PBS) proton therapy system and quantify the agreement among three beam-matched treatment rooms (GTR1, GTR2, and GTR3). In-air spot size measurements were acquired using a 2D scintillation detector at various gantry angles.
Suresh Rana, Jaafar Bennouna
openaire   +2 more sources

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

A Monte Carlo study on the collimation of pencil beam scanning proton therapy beams

Medical Physics, 2016
Purpose:The lateral edge of a proton therapy beam is commonly used to achieve conformality to the treatment volume where critical structures reside close to the target. However, when treating shallow depths, the lateral edge of a pencil beam scanning (PBS) system may be broader than that of a double scattered (DS) system.
Frances C, Charlwood, Adam H, Aitkenhead, Ranald I, Mackay   +2 more
openaire   +2 more sources