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Radiotherapy Technologist Dose from High-energy Electron Medical Accelerators
Health Physics, 1985Whole-body doses incurred by radiation therapy technologists working with 18- and 24-MV medical linear accelerators have been measured at two clinics under normal working conditions with a sensitive solid-state personal dosimeter. The results based on 84 treatments indicate that average monthly doses in the range 12-19 mrem can be expected for 30 daily
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Radiobiological Properties of High—Energy Cyclotron-Produced Neutrons Used for Radiotherapy
Radiology, 1975Radiobiological properties of high-energy cyclotron-produced neutrons were investigated. The survival curve for mammalian cells exposed to 35 MeV neutrons has an appreciable shoulder, but exhibits a significant initial slope at low doses. split-dose experiments, using doses comparable to the daily fractions of neutron therapy, indicate no repair of ...
E J, Hall +3 more
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Low- versus High-Energy Photon Beams in Radiotherapy for Lung Cancer
Medical Dosimetry, 1993This retrospective study analyzed the outcome of lung cancer patients who were treated with either 4-MV or 10-MV photons. From October 1979 through December 1982, 126 patients with locally advanced, unresectable or medically inoperable, nonmetastatic non-small cell lung cancer were treated in a prospective trial in which they were randomly assigned to ...
R L, Foote +6 more
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Spectra of photoneutrons produced by high-energy X-ray radiotherapy linacs
Radiation Protection Dosimetry, 2008Spectral fluence of photoneutrons generated in the head of the radiotherapeutic linac Varian 2100 C/D was measured by means of the Bonner spheres spectrometer whose active detector of thermal neutrons was replaced by a track detector, i.e. a sandwich of four CR-39s with the boron radiator inserted between them.
M, Králík, K, Turek, V, Vondrácek
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Clinical Trials in Radiotherapy and the Merits of High Energy Protons
Acta Radiologica: Therapy, Physics, Biology, 1970(1970). Clinical Trials in Radiotherapy and the Merits of High Energy Protons. Acta Radiologica: Therapy, Physics, Biology: Vol. 9, No. 1, pp. 1-23.
S, Graffman, B, Jung
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Solid Lead-glass Viewing Windows for High Energy Radiotherapy Installations
The British Journal of Radiology, 1956The design of buildings for high energy radiotherapy units requires an early consideration of the means whereby the patient may be kept constantly in the view of the operator during treatment. In the case of two such recent installations at this Centre, the “Theratron” Cobalt 60 unit* and the “Orthotron” 4 MeV linear accelerator, † we have designed and
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Investigation of photoneutron dose equivalent from high-energy photons in radiotherapy
Applied Radiation and Isotopes, 2007Spatial distribution of photoneutron dose equivalent during radiotherapy at different beam size, depth, and distance from a 15 MV linear accelerator was investigated with bubble detectors in a water phantom. The photoneutron dose equivalent was mainly from fast neutrons, and decreased with distance at a fixed field and with depth. Besides, photoneutron
Lin, Chun-Chih +2 more
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Characterisation of neutron fields around high-energy x-ray radiotherapy machines
Radiation Protection Dosimetry, 2004Photoneutron spectra around the treatment bed of a Varian Clinac 2100C machine were measured using a Bonner sphere spectrometer. To overcome problems with pulse pile-up and detection of non-neutron-induced events, the active detector of thermal neutrons normally used at the centre of the spheres was replaced by a sandwich of four CR-39 track detectors ...
M, Králík, K, Turek
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BNCT AS RADIOSENSITIZER IN HIGH-ENERGY RADIOTHERAPY TREATMENTS
2017High-energy linear accelerators for radiotherapy produce fast secondary neutrons due to (γ,n) reaction. Considering the moderating effect of human body, an unavoidable and undesired thermal neutron flux is localized in the tumor area. This study proposes the possibility to employ this neutron background to enhance the radiotherapy efficacy: the thermal
Katia Alikaniotis +3 more
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