Results 51 to 60 of about 4,358 (152)

CRANIOSPINAL IRRADIATION USING PENCIL BEAM SCANNING: THE PSI EXPERIENCE

International Journal of Particle Therapy
Introduction We present the dosimetric evaluation of craniospinal irradiation (CSI) treatments delivered with protons at Paul Scherrer Institute (PSI), with special focus on local recurrences and late toxicity outcome. Methods This study included 71 children, adolescents and young adults (c-AYA), who received or intended to receive (3 patients, pts ...
Bolsi, Alessandra, De Angelis, Claudio, Vázquez, Miriam, Siewert, Dorota, Correia, Dora, Bachmann, Nicolas, Lomax, Antony J., Pica, Alessia, Weber, Damien C.   +8 more
openaire   +3 more sources

Silicon 3D Microdosimeters for Advanced Quality Assurance in Particle Therapy

Applied Sciences, 2021
The Centre for Medical Radiation Physics introduced the concept of Silicon On Insulator (SOI) microdosimeters with 3-Dimensional (3D) cylindrical sensitive volumes (SVs) mimicking the dimensions of cells in an array. Several designs of high-definition 3D
Linh T. Tran, David Bolst, Benjamin James, Vladimir Pan, James Vohradsky, Stefania Peracchi, Lachlan Chartier, Emily Debrot, Susana Guatelli, Marco Petasecca, Michael Lerch, Dale Prokopovich, Željko Pastuović, Marco Povoli, Angela Kok, Taku Inaniwa, Sung Hyun Lee, Naruhiro Matsufuji, Anatoly B. Rosenfeld   +18 more
doaj   +1 more source

Clinical Implementation of Proton Therapy Using Pencil-Beam Scanning Delivery Combined With Static Apertures

Frontiers in Oncology, 2021
Proton therapy makes use of the favorable depth-dose distribution with its characteristic Bragg peak to spare normal tissue distal of the target volume. A steep dose gradient would be desired in lateral dimensions, too.
Christian Bäumer, Christian Bäumer, Christian Bäumer, Christian Bäumer, Sandija Plaude, Sandija Plaude, Dalia Ahmad Khalil, Dalia Ahmad Khalil, Dalia Ahmad Khalil, Dirk Geismar, Dirk Geismar, Dirk Geismar, Dirk Geismar, Paul-Heinz Kramer, Paul-Heinz Kramer, Kevin Kröninger, Christian Nitsch, Jörg Wulff, Jörg Wulff, Beate Timmermann, Beate Timmermann, Beate Timmermann, Beate Timmermann   +22 more
doaj   +1 more source

Design study for a compact laser-driven source for medical x-ray fluorescence imaging

Physical Review Accelerators and Beams, 2020
Thomson scattering sources with their hard x-ray pencil beams represent a promising candidate to drive high-resolution X-ray Fluorescence Imaging (XFI).
Theresa Brümmer, Alexander Debus, Richard Pausch, Jens Osterhoff, Florian Grüner   +4 more
doaj   +1 more source

Proton beam therapy delivered using pencil beam scanning vs. passive scattering/uniform scanning for localized prostate cancer: Comparative toxicity analysis of PCG 001-09

Clinical and Translational Radiation Oncology, 2019
Background and purpose: Patient-level benefits of proton beam therapy (PBT) relative to photon therapy for prostate cancer (PC) continue to be the focus of debate. Although trials comparing the two modalities are underway, most are being conducted using “
Mark V. Mishra, Rahul Khairnar, Søren M. Bentzen, Gary Larson, Henry Tsai, Christopher Sinesi, Carlos Vargas, George Laramore, Carl Rossi, Lane Rosen, Mingyao Zhu, William Hartsell   +11 more
doaj   +1 more source

Arms positioning in post-mastectomy proton radiation: Feasibility and development of a new arms down contouring atlas

Physics and Imaging in Radiation Oncology, 2020
Background and purpose: Breast cancer patients receiving radiation are traditionally positioned with both arms up, but this may not be feasible or comfortable for all patients.
Nicolas Depauw, Estelle Batin, Andrew Johnson, Shannon M. MacDonald, Rachel B. Jimenez   +4 more
doaj   +1 more source

High frequency percussive ventilation for respiratory immobilization in radiotherapy

Technical Innovations & Patient Support in Radiation Oncology, 2019
High frequency percussive ventilation (HFPV) employs high frequency low tidal volumes (100–400 bursts/min) to provide respiration in awake patients while simultaneously reducing respiratory motion.
Ina M. Sala, Girish B. Nair, Beverly Maurer, Thomas M. Guerrero   +3 more
doaj   +1 more source

Development of Optical Fiber Based Measurement System for the Verification of Entrance Dose Map in Pencil Beam Scanning Proton Beam

Sensors, 2018
This study describes the development of a beam monitoring system for the verification of entrance dose map in pencil beam scanning (PBS) proton therapy based on fiber optic radiation sensors (FORS) and the validation of this system through a feasibility ...
Jaeman Son, Se Byeong Lee, Youngkyung Lim, Sung Yong Park, Kwanho Cho, Myonggeun Yoon, Dongho Shin   +6 more
doaj   +1 more source

Proton beam therapy in paediatric radiation oncology: Defining the limitations, uncertainties and optimisation of treatment plans

EJC Paediatric Oncology
Proton Beam Therapy (PBT) is an increasingly utilised modality for treating tumours by utilising the physical properties of accelerated proton beams. This review explores the development of PBT, its dosimetric advantages over conventional x-ray-based ...
C.S.M. Gillies, P. Lim, C. Dunlea, B. Timmermann, C. Alapetite, S. Bolle, I.F. Kristensen, K. Seiersen, Y. Lassen-Ramshad   +8 more
doaj   +1 more source

Dual X-ray absorptiometry: a comparison between fan beam and pencil beam scans

The British Journal of Radiology, 1993
Abstract The recent introduction of dual X-ray absorptiometry (DXA) systems with fan beam instead of conventional pencil beam scanning geometry represents a significant technical advance in bone densitometry. This report describes phantom and in-vivo studies of the effect of the change in beam configuration on DXA measurements.
Blake, G M, Parker, J C, Buxton, F M, Fogelman, I   +3 more
openaire   +2 more sources