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A superconducting cyclotron for neutron radiation therapy
Medical Physics, 1994The physical and clinical specifications of a neutron therapy facility utilizing a superconducting cyclotron are presented. The cyclotron and its support system are described. Details of the operation of the cyclotron in a hospital environment are given; the requirements of the helium liquifier and cryogenic system are described together with a summary
R L, Maughan, W E, Powers, H G, Blosser
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Response of Burros to Neutron-gamma-radiation
Health Physics, 1961The response of burros to neutron- gamma -radiation was studied. Seven animals received 180 rads (145 rads n, 35 rads gamma ) at a rate of 6 rads per min. The death of two burros at this dose level was unexpected. The clinical symptoms of these animals resembled those of central nervous system damage, heretofore seen with larger doses and much higher ...
R E, THOMAS, D G, BROWN
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Physics intercomparisons for neutron radiation therapy
International Journal of Radiation Oncology*Biology*Physics, 1977Abstract For several years, a concerted effort has been going on to ensure that all the groups involved in neutron dosimetry have intercompared their absorbed dose standards. These intercomparisons have relevance to both neutron radiotherapy and neutron radiobiology.
P R, Almond, J B, Smathers
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Solar Neutrons and the Earth's Radiation Belts
Science, 1964The intensity and spectrum of solar neutrons in the vicinity of the earth are calculated on the assumption that the low-energy protons recently detected in balloon and satellite flights are products of solar neutron decay. The solar-neutron flux thus obtained exceeds the global average cosmic-ray neutron leakage above 10 Mev, indicating that it may be ...
R E, Lingenfelter, E J, Flamm
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Treatment planning for neutron radiation therapy
International Journal of Radiation Oncology*Biology*Physics, 1977Abstract Treatment-planning techniques developed for photon therapy have been freely borrowed for fast-neutron beam therapy, including methods of storing the measured data and subsequent manipulation to correct for patient contour, inhomogeneities, oblique incidence of the beam, and the presence of beam-modifying devices.
P, Wootton, K, Weaver, J, Eenmaa
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Physics Today, 1963
A 70-inch cyclotron is now under construction at the US Naval Radiological Defense Laboratory at Hunters Point, Calif. Known as the Neutron Radiation Facility, the machine will be used mainly in neutron-damage studies, but proton and deuteron experiments will also be possible. Construction will cost $3 million.
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A 70-inch cyclotron is now under construction at the US Naval Radiological Defense Laboratory at Hunters Point, Calif. Known as the Neutron Radiation Facility, the machine will be used mainly in neutron-damage studies, but proton and deuteron experiments will also be possible. Construction will cost $3 million.
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Treatment of Malignant Gliomas with Neutron Radiation
Neurologic Clinics, 1985The author contends that neutron radiation therapy coupled with radiation therapy or other forms of particle radiation therapy may play a role in the management of malignant gliomas. Improved survival, particularly for the patients with the diagnosis of glioblastoma, is discussed.
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History of the use of neutrons in radiation therapy
International Journal of Radiation Oncology*Biology*Physics, 1977Abstract The early history of fast neutron therapy is emphasized and, where possible, related to the relevant reports which appear elsewhere in this issue. Some of the high points in the invention and development of the early cyclotrons are reviewed and their use in treating the first series of patients is discussed.
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Neutron Radiation Measurements on Several International Flights
Health Physics, 2015The earth is continually exposed to cosmic radiation of both solar and galactic origin. High-energy particles interact with the constituents in the atmosphere producing secondary particles that create radiation fields at aircraft altitudes. These secondary particles consist mainly of photons, protons, neutrons, charged and uncharged pions, and muons ...
Poje, Marina +4 more
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Measurement of Slow Neutrons and Coexisting Radiations
Radiation Research, 1954The accurate measurement of slow neutrons for biological studies is a difficult and important problem. Measurement is complicated because of the nature of the methods required for the production of an adequate neutron flux for biological investigations.
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