Results 21 to 30 of about 422,862 (268)

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

Implementation of Monte Carlo based PET verification of ion beam delivery into a TPS

Radiation Medicine and Protection, 2022
Objective: To develop and implement an ion beam teletherapy verification system based upon simulations of induced radioactivity and comparison with patient positron emission tomography (PET) scans.
Pablo Yepes, Zhuangming Shen, Michael F. Moyers, Qianxia Wang, Hongliang Chen, Jie Li, Yongqiang Li, James Lin   +7 more
doaj   +1 more source

Registration error of the liver CT using deformable image registration of MIM Maestro and Velocity AI

BMC Medical Imaging, 2017
Background Understanding the irradiated area and dose correctly is important for the reirradiation of organs that deform after irradiation, such as the liver.
Nobuyoshi Fukumitsu, Kazunori Nitta, Toshiyuki Terunuma, Toshiyuki Okumura, Haruko Numajiri, Yoshiko Oshiro, Kayoko Ohnishi, Masashi Mizumoto, Teruhito Aihara, Hitoshi Ishikawa, Koji Tsuboi, Hideyuki Sakurai   +11 more
doaj   +1 more source

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

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

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

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

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

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

Strangeness production in proton—proton and proton—nucleus collisions [PDF]

Pramana, 2006
16 pages, 9 figures, Talk presented in the workshop on Hadron Physics, Puri, India, March 7-17 ...
openaire   +2 more sources