Results 261 to 270 of about 2,714,943 (294)

Analytic modeling of photon scatter from flattening filters in photon therapy beams

Medical Physics, 1994
Analytic models for calculation of scatter distributions from flattening filters in therapy photon beams are presented. It is shown that the amount of scatter with high atomic number filters can vary from 2% in 4‐MV beams to 10% for 24‐MV beams. The use of low atomic number filters can increase the amount of scatter by a factor of 2.
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Photon irradiation response of photonic crystal fibres and flat fibres at radiation therapy doses

Applied Radiation and Isotopes, 2014
Radiation effects of photon irradiation in pure Photonic Crystal Fibres (PCF) and Flat fibres (FF) are still much less investigated in thermoluminescense dosimetry (TLD). We have reported the TL response of PCF and FF subjected to 6 MV photon irradiation. The proposed dosimeter shows good linearity at doses ranging from 1 to 4 Gy.
Hashim, S, Ibrahim, SA, Omar, SSC, Alajerami, YSM, Saripan, MI, Noor, NM, Ung, NM, Mahdiraji, GA, Bradley, DA, Alzimami, K   +9 more
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Carbon Footprint of Photon Therapy

International Journal of Radiation Oncology*Biology*Physics, 2023
T. Dvorak, A.P. Shah, J.M. Rineer, P. Kelly, C. Dvorak, J. Salazar   +5 more
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Medium Energy Photon Accelerator for Therapy

IEEE Transactions on Nuclear Science, 1983
The Harvard Cyclotron Laboratory is designing a small synchrotron to make low-current adjustable-energy proton beams for radiotherapy. The specifications include an adjustable range of 50 to 250 MeV; an 0.1 microamp average in 10 pulses per second; a size of 6 by 6 meters; a weight of 5 tons; and a prototype cost of ca. $400 K.
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Multiple scattering imager for photon therapy

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC), 2013
During radiation therapy, it is necessary to monitor the irradiated position and energy deposited in the patient. In general, calculations before photon exposure or 2D measurement of transmitted photons have been widely used for dose estimation. In this research, we propose real-time 3D dose measurement using Compton imaging technology. On the basis of
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Advanced photon therapies

2011
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Photon activation therapy (PAT)

International Journal of Radiation Oncology*Biology*Physics, 1987
R W, Miller, W, DeGraff, J B, Mitchell, T J, Kinsella   +3 more
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Therapy by photon activation?

Nature, 1988
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Is charged particle therapy superior to photon therapy?

The Lancet Oncology, 2014
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Photonic NanoPhone for proton therapy and IVUS [PDF]

, 2010
The photonic NanoPhone, an all-optical array receiver containing several hundreds of small and sensitive yet inexpensive acoustic sensors, will be beneficial to at least two important medical applications. In proton therapy, the NanoPhone will enable the monitoring and adjustment of both the trajectory and the strength of the proton beam during ...
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