Results 21 to 30 of about 1,526,367 (327)

Applications of various range shifters for proton pencil beam scanning radiotherapy

Radiation Oncology, 2021
Background A range pull-back device, such as a machine-related range shifter (MRS) or a universal patient-related range shifter (UPRS), is needed in pencil beam scanning technique to treat shallow tumors.
Haibo Lin, Chengyu Shi, Sheng Huang, Jiajian Shen, Minglei Kang, Qing Chen, Huifang Zhai, James McDonough, Zelig Tochner, Curtiland Deville, Charles B. Simone, Stefan Both   +11 more
doaj   +1 more source

Prioritization of Proton Patients in the COVID-19 Pandemic: Recommendations from The New York Proton Center [PDF]

International Journal of Particle Therapy, 2020
It has been well documented from the early days of the 2019 novel coronavirus (COVID19) pandemic that patients with a diagnosis of cancer are not only at higher risks of contracting a COVID-19 infection but also at higher risks of suffering severe, and ...
Arpit M. Chhabra, J. Isabelle Choi, Shaakir Hasan, Robert H. Press, Charles B. Simone   +4 more
doaj   +1 more source

Comparison of pencil beam and Monte Carlo calculations with ion chamber array measurements for patient-specific quality assurance

Radiation Medicine and Protection, 2022
Objective: To determine under what conditions and criteria comparisons between calculations made with the current clinical treatment planning system (Syngo) and an in-house built TPS (TIMPS) would allow skipping of in-beam portal-specific measurements ...
Yu Deng, Zhi Chen, Qianxia Wang, Pablo Yepes, Zhuangming Shen, Hongliang Chen, Jie Li, Michael F. Moyers   +7 more
doaj   +1 more source

Longitudinal Quantitative Analysis of Radiation Oncology Staff Illness in a New York City Center during COVID-19: The Impact of New Guidelines on Operations and Employee Health [PDF]

International Journal of Particle Therapy, 2020
Purpose: The novel coronavirus (COVID-19) forced radiation oncology clinics to overhaul operational policies, but the effect on employee safety has not, to our knowledge, been reported.
Shaakir Hasan, DO, Robert H. Press, MD, Arpit Chhabra, MD, J. Isabelle Choi, MD, Charles B. Simone II, MD   +4 more
doaj   +1 more source

Deep learning method for prediction of patient-specific dose distribution in breast cancer

Radiation Oncology, 2021
Background Patient-specific dose prediction improves the efficiency and quality of radiation treatment planning and reduces the time required to find the optimal plan. In this study, a patient-specific dose prediction model was developed for a left-sided
Sang Hee Ahn, EunSook Kim, Chankyu Kim, Wonjoong Cheon, Myeongsoo Kim, Se Byeong Lee, Young Kyung Lim, Haksoo Kim, Dongho Shin, Dae Yong Kim, Jong Hwi Jeong   +10 more
doaj   +1 more source

Verification of an independent dose calculation method for portal-specific QA of proton and carbon ion beams

Radiation Medicine and Protection, 2022
Objective: To verify the accuracy of an independent dose calculation method, as incorporated into an in-house developed treatment planning system (TPS), for performing quality assurance of dose distributions delivered to a water phantom planned by a ...
Michael F. Moyers, Qianxia Wang, Yu Deng, Hongliang Chen, Zhi Chen, Xiaoli Liu, Nicki Schlegel, Jie Li, Zhuangming Shen, James Lin, Pablo Yepes   +10 more
doaj   +1 more source

The rate of the proton-proton reaction

The Astrophysical Journal, 1994
We re-evaluate the matrix element for the proton-proton reaction which is important for stellar-evolution calculations and for the solar-neutrino problem. We self-consistently determine the effect of vacuum polarization on the matrix element by first correcting the low-energy scattering data to account for vacuum polarization.
Kamionkowski, Marc, Bahcall, John N.
openaire   +2 more sources

Monitoring of breathing motion in image-guided PBS proton therapy: comparative analysis of optical and electromagnetic technologies

Radiation Oncology, 2017
Background Motion monitoring is essential when treating non-static tumours with pencil beam scanned protons. 4D medical imaging typically relies on the detected body surface displacement, considered as a surrogate of the patient's anatomical changes, a ...
Giovanni Fattori, Sairos Safai, Pablo Fernández Carmona, Marta Peroni, Rosalind Perrin, Damien Charles Weber, Antony John Lomax   +6 more
doaj   +1 more source

Exploring the experience of meaning-centered group psychotherapy among Chinese cancer patients during active treatment: a descriptive qualitative study

Frontiers in Psychiatry, 2023
ObjectiveMeaninglessness poses a significant psychological challenge for cancer patients, negatively affecting their quality of life and increasing the risk of suicide.
Shuman Wang, Shuman Wang, Shuman Wang, Mimi Zheng, Mimi Zheng, Mimi Zheng, Yu Zhu, Yu Zhu, Yu Zhu, Lijuan Zhang, Lijuan Zhang, Lijuan Zhang, Xiaoru Li, Xiaoru Li, Xiaoru Li, Hongwei Wan, Hongwei Wan, Hongwei Wan   +17 more
doaj   +1 more source

Proton-proton Bremsstrahlung

Nuclear Physics B, 1967
Abstract We calculate proton-proton Bremsstrahlung cross sections using the Tabakin separable potentials to generate off-shell nucleon-nucleon t-matrix elements in low partial waves and off-shell one-pion-exchange amplitudes for the higher partial waves.
W.A. Pearce, W.A. Gale, I.M. Duck
openaire   +2 more sources