Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Dongxu Wang"'
Autor:
Liyong Lin, Timothy D. Solberg, Blake R. Smith, Dongxu Wang, Maura Kirk, Daniel E. Hyer, Ryan T. Flynn, Alexandra Moignier, Edgar Gelover
Publikováno v:
Medical Physics. 43:4693-4699
Purpose: To quantitatively assess the advantages of energy-layer specific dynamic collimation system (DCS) versus a per-field fixed aperture for spot scanning proton therapy (SSPT). Methods: Five brain cancer patients previously planned and treated w
Autor:
Dongxu Wang, Patrick M. Hill, Mark Pankuch, Edgar Gelover, Steve Laub, Daniel E. Hyer, Ryan T. Flynn, Mingcheng Gao
Publikováno v:
Medical Physics. 42:1321-1334
Purpose: To introduce a method to model the 3D dose distribution of laterally asymmetric proton beamlets resulting from collimation. The model enables rapid beamlet calculation for spot scanning (SS) delivery using a novel penumbra-reducing dynamic c
Autor:
Blake R. Smith, Liyong Lin, Dongxu Wang, Ryan T. Flynn, Edgar Gelover, Daniel E. Hyer, Timothy D. Solberg, Maura Kirk, Alexandra Moignier, Alexander Lin
Publikováno v:
Medical physics. 43(3)
Purpose: To quantify improvement in target conformity in brain and head and neck tumor treatments resulting from the use of a dynamic collimation system (DCS) with two spot scanning proton therapydelivery systems (universal nozzle, UN, and dedicated
Publikováno v:
Medical Physics. 39:2997-3008
Purpose: To describe a novel methodology of converting megavoltage x-ray projections into virtual proton projections that are otherwise missing due to the proton range limit. These converted virtual proton projections can be used in the reconstructio
Publikováno v:
Medical Physics. 37:4138-4145
Purpose: To describe a method to estimate the proton path in proton computed tomography (pCT) reconstruction, which is based on the probability of a proton passing through each point within an object to be imaged. Methods: Based on multiple Coulomb s
Autor:
Dongxu, Wang, Blake, Dirksen, Daniel E, Hyer, John M, Buatti, Arshin, Sheybani, Eric, Dinges, Nicole, Felderman, Mindi, TenNapel, John E, Bayouth, Ryan T, Flynn
Publikováno v:
Medical physics. 41(12)
To determine the plan quality of proton spot scanning (SS) radiosurgery as a function of spot size (in-air sigma) in comparison to x-ray radiosurgery for treating peripheral brain lesions.Single-field optimized (SFO) proton SS plans with sigma rangin
Publikováno v:
Medical physics. 41(9)
In the absence of a collimation system the lateral penumbra of spot scanning (SS) dose distributions delivered by low energy proton beams is highly dependent on the spot size. For current commercial equipment, spot size increases with decreasing prot
Publikováno v:
Medical physics. 39(6)
To describe a novel methodology of converting megavoltage x-ray projections into virtual proton projections that are otherwise missing due to the proton range limit. These converted virtual proton projections can be used in the reconstruction of prot
Publikováno v:
Medical Physics. 41:550-551
Purpose: There has been a growing interest in applying collimation to pencil beam scanning (PBS) proton therapy in order to sharpen the lateral dose falloff out of the target, especially at low energies. Currently, there is not a method to optimally
Publikováno v:
Medical Physics. 41:552-553
Purpose: Pencil beam scanning (PBS) proton therapy provides excellent dosimetric benefits in pelvic cancer treatment, yet day-to-day anatomical variations in pelvic region tend to cause range uncertainties. This study evaluates the dosimetric robustn