Results 211 to 220 of about 78,262 (259)
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Regenerative photonic therapy: Review
AIP Conference Proceedings, 2012After four decades of research of photobiomodulation phenomena in mammals in vitro and in vivo, a solid foundation is created for the use of photobiomodulation in regenerative medicine. Significant accomplishments are achieved in animal models that demonstrate opportunities for photo-regeneration of injured or pathological tissues: skin, muscles and ...
Natasha Salansky, Norman Salansky
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On bolus for megavoltage photon and electron radiation therapy
Medical Dosimetry, 2013Frequently, in radiation therapy one must treat superficial lesions on cancer patients; these are at or adjacent to the skin. Megavoltage photon radiotherapy penetrates through the skin to irradiate deep-seated tumors, with skin-sparing property. Hence, to treat superficial lesions, one must use a layer of scattering material to feign as the skin ...
Vedang, Vyas +7 more
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Optimization of photon beam flatness for radiation therapy
Physics in Medicine and Biology, 2007In this work, we investigate the relation between lateral fluence/dose distributions and photon beam uniformity, possibly identifying ways to improve these characteristics. The calculations included treatment head scatter properties associated with three common types of linear accelerators in order to study their impact on the results.
Jörgen, Olofsson +3 more
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Collimator scatter in photon therapy beams
Medical Physics, 1995A model for collimator photon scatter calculations is presented. The scatter from a collimating block is separated into two categories, one being the scatter released from photons entering the block through the surface facing the source, and one from photons striking the block tangentially through the side tangential to the beam.
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Photon and photon–neutron experimental dosimetry in Grid therapy with 18 MV photon beams
Journal of Radiotherapy in Practice, 2020AbstractPropose:Spatially fractionated Grid radiation therapy (SFGRT) in an effective technique for bulky and radio-sensitive tumours. SFGRT using a constructed block has been used to evaluate the photon and photo-neutron (PN) dose measurement in 18-MV photon beam energy.Methods and materials:A mounted Grid block on to a Varian Clinac 2100c linear ...
Sareh Tajiki +6 more
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Recent Advances in Two-Photon Photodynamic Therapy
Anti-Cancer Agents in Medicinal Chemistry, 2008Photodynamic therapy (PDT) is a treatment for tumors and accepted in several countries in the world. Introduction of two-photon absortion (2PA) into PDT allows spatially selective treatment of cancers. Possibilities and limitations of the use of two-photon excitation in PDT are discussed, and many literatures in this area are reviewed.
Kazuya, Ogawa, Yoshiaki, Kobuke
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Future Radiation Therapy: Photons, Protons and Particles
Future Oncology, 2013Radiation therapy plays a critical role in the current management of cancer patients. The most common linear accelerator-based treatment device delivers photons of radiation. In an ever more precise fashion, state-of-the-art technology has recently allowed for both modulation of the radiation beam and imaging for this treatment delivery.
Ron R, Allison +2 more
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Two-photon excitation nanoparticles for photodynamic therapy
Chemical Society Reviews, 2016Integration of the two-photon excitation (TPE) technique and nanomaterials to construct TPE nanoparticle-based photosensitizers for PDT is summarized and reviewed.
Yizhong, Shen +4 more
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Photon-beam radiation therapy and Monte Carlo
Computing in Science & Engineering, 2000Because small variations in radiation doses can cause significant changes in clinical outcome, the calculation accuracy is a major factor in the success or failure of a cancer treatment course. This article describes how stochastic, Monte Carlo radiation transport methods can predict radiation doses for cancer patients.
Christine L. Hartmann Siantar +1 more
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Strahlentherapie, 1985
It is suggested here that significant advantages should accrue from the use of 40 keV photons from implanted sources of 145Sm. These energies should stimulate Auger electron cascades from IdUrd, as well as produce non-repairable damage from radiosensitization.
Fairchild, Ralph G., Bond, V. P.
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It is suggested here that significant advantages should accrue from the use of 40 keV photons from implanted sources of 145Sm. These energies should stimulate Auger electron cascades from IdUrd, as well as produce non-repairable damage from radiosensitization.
Fairchild, Ralph G., Bond, V. P.
openaire +1 more source