Results 1 to 10 of about 113,186 (233)

An experimental study of focused very high energy electron beams for radiotherapy [PDF]

Communications Physics, 2021
AbstractVery high energy electron (VHEE) beams have been proposed as an alternative radiotherapy modality to megavoltage photons; they penetrate deeply without significant scattering in inhomogeneous tissue because of their high relativistic inertia. However, the depth dose distribution of a single, collimated VHEE beam is quasi-uniform, which can lead
Eugenio Senes, Eugenio Senes, Roberto Corsini, L. Garolfi, Davide Gamba, Alessandro Curcio, Enrico Brunetti, Dino A. Jaroszynski, Wilfrid Farabolini, Wilfrid Farabolini, Kyrre Sjobak, Kyrre Sjobak, Karolina Kokurewicz, Antonio Gilardi   +13 more
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A focused very high energy electron beam for fractionated stereotactic radiotherapy [PDF]

Scientific Reports, 2021
AbstractAn electron beam of very high energy (50–250 MeV) can potentially produce a more favourable radiotherapy dose distribution compared to a state-of-the-art photon based radiotherapy technique. To produce an electron beam of sufficiently high energy to allow for a long penetration depth (several cm), very large accelerating structures are needed ...
Svendsen, Kristoffer, Guénot, Diego, Björklund Svensson, Jonas Halfdan, Petersson, Kristoffer, Persson, Anders, Lundh, Olle   +5 more
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Assessment of the quality of very high-energy electron radiotherapy planning [PDF]

Radiotherapy and Oncology, 2016
To assess the quality of very-high energy electron (VHEE) scanning pencil beam radiation therapy in relation to state-of-the-art volumetric modulated arc therapy (VMAT) and to determine the extent of its application.We planned five clinical cases with VHEE scanning pencil beams of 100 and 120MeV, equally distributed in a coplanar arrangement around the
Billy W. Loo, E Hynning, Magdalena Bazalova-Carter, Björn Hårdemark, Peter G. Maxim, B Palma, B Qu   +6 more
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Laser-plasma generated very high energy electrons (VHEEs) in radiotherapy [PDF]

SPIE Proceedings, 2017
As an alternative modality to conventional radiotherapy, electrons with energies above 50 MeV penetrate deeply into tissue, where the dose can be absorbed within a tumour volume with a relatively small penumbra. We investigate the physical properties of VHEEs and review the state-of-the-art in treatment planning and dosimetry. We discuss the advantages
Kokurewicz, Karolina, Welsh, G. H., Brunetti, E., Wiggins, S. Mark, Boyd, M., Sorensen, A., Chalmers, A., Schettino, G., Subiel, Anna, DesRosiers, Colleen, Jaroszynski, Dino A.   +10 more
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In vivo neutron dosimetry during high-energy Bremsstrahlung radiotherapy

International Journal of Radiation Oncology*Biology*Physics, 1998
A new technique is presented for in vivo measurements of the dose equivalent from photoneutrons produced by high-energy radiotherapy accelerators.The dosimeters used for this purpose are vials of superheated halocarbon droplets suspended in a tissue-equivalent gel.
L. Tana, Ravinder Nath, Francesco D'Errico, Giovanni Silvano   +3 more
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Use of Radiotherapy by High-energy Protons in the Postoperative Treatment of Brain Tumor

Neurologia medico-chirurgica, 1986
Fractionated irradiation using 250 mega electron volt protons alone or in combination with 60cobalt (Co) gamma ray was given postoperatively to 8 patients with glioma and 2 patients with meningioma. A single field was used for all patients. The irradiated field varied from 28 to 144 cm2; the irradiated depth was from 6 to 11 cm and the width of the ...
Tetsuo Inada, Akira Narushima, Tadao Nose, Yutaka Maki, Toshio Kitagawa, Akira Maruhashi, Shingo Takano, Nobuyoshi Ishikawa, Yoshihiko Yoshii, Kiyoshi Oohara, Kintomo Takakura, Masanori Hashikawa, Kunio Nakagawa, Koichi Kitamura   +13 more
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Activation of hip prostheses in high energy radiotherapy and resultant dose to nearby tissue [PDF]

Journal of Applied Clinical Medical Physics, 2017
AbstractHigh energy radiotherapy can produce contaminant neutrons through the photonuclear effect. Patients receiving external beam radiation therapy to the pelvis may have high‐density hip prostheses. Metallic materials such as those in hip prostheses, often have high cross‐sections for neutron interaction. In this study, Thackray (UK) prosthetic hips
S. Keehan, Michael Taylor, Max Esser, Tomas Kron, Tomas Kron, Rick Franich, Peta Lonski, Peta Lonski, Ryan L. Smith, Jeremy Millar   +9 more
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Peripheral dose measurement in high-energy photon radiotherapy with the implementation of MOSFET

World Journal of Radiology, 2010
To study the peripheral dose (PD) from high-energy photon beams in radiotherapy using the metal oxide semiconductor field effect transistor (MOSFET) dose verification system.The radiation dose absorbed by the MOSFET detector was calculated taking into account the manufacturer's Correction Factor, the Calibration Factor and the threshold voltage shift ...
Dimitrios Kardamakis, George Panayiotakis, H. Delis, Georgia Malatara, Vassiliki Vlachopoulou, Kiki Theodorou   +5 more
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Characteristics Analysis of High Energy External Radiotherapy Beams in Water

Malaysian Journal of Medical and Biological Research, 2018
High energy external radiotherapy beam is being used widely for cancer treatment. Biological effect of radiation is concerned with the evaluation of energy absorbed in the tissue. The study of photon and electron beam characteristics is necessary before calibration machine.
M. Jahangir Alam, M. A. Rahman, Md. Akhtaruzzaman   +2 more
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Roentgen Stand for Field Positioning in High-Energy Radiotherapy [PDF]

Acta Radiologica: Therapy, Physics, Biology, 1968
Wilhelm Wretlind, Kay Ståhl, Bengt Rosengren, Bo Jung, Börje Larsson   +4 more
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