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Analytic modeling of photon scatter from flattening filters in photon therapy beams
Medical Physics, 1994Analytic 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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Advanced Functional Materials
AbstractTwo‐photon excitation (2PE) represents substantial advantages in biophotonics over traditional one‐photon excitation (1PE), offering enhanced spatial resolution and deeper tissue penetration capabilities. Since its introduction in the 1990s, two‐photon excited microscopy has spurred the rapid emergence of novel 2PE‐based applications, including
Amir Soleimany +5 more
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AbstractTwo‐photon excitation (2PE) represents substantial advantages in biophotonics over traditional one‐photon excitation (1PE), offering enhanced spatial resolution and deeper tissue penetration capabilities. Since its introduction in the 1990s, two‐photon excited microscopy has spurred the rapid emergence of novel 2PE‐based applications, including
Amir Soleimany +5 more
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Journal of Colloid and Interface Science
Photodynamic therapy (PDT) offers potential for combating bacterial infections through the generation of reactive oxygen species (ROS). However, the antibacterial efficiency of PDT is largely impeded by the limited photon absorption of photosensitizers and the short diffusion length and lifespan of ROS.
Hui Wang +7 more
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Photodynamic therapy (PDT) offers potential for combating bacterial infections through the generation of reactive oxygen species (ROS). However, the antibacterial efficiency of PDT is largely impeded by the limited photon absorption of photosensitizers and the short diffusion length and lifespan of ROS.
Hui Wang +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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Medium Energy Photon Accelerator for Therapy
IEEE Transactions on Nuclear Science, 1983The 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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Two-photon photodynamic therapy: photobleaching rates
Opto-Canada: SPIE Regional Meeting on Optoelectronics, Photonics, and Imaging, 2017A promising development in photodynamic therapy (PDT) is the use of two-photon excitation (TPE). The confinement of the excitation volume leads to the possibility of subcellular PDT. Thus, in order to design a treatment protocol, one must be aware of where a photosensitizer localizes in a cell and the individual differences, both between cellular ...
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Multiple scattering imager for photon therapy
2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC), 2013During 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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Carbon Footprint of Photon Therapy
International Journal of Radiation Oncology*Biology*Physics, 2023T. Dvorak +5 more
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Photon activation therapy (PAT)
International Journal of Radiation Oncology*Biology*Physics, 1987R W, Miller +3 more
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