Results 61 to 70 of about 3,943 (183)

Modeling of the Characteristics of Electron Beams and Generated Photon Fluxes on the M-30 Microtron

East European Journal of Physics
Ensuring optimization of the radiation treatment process of experimental samples at electron accelerators and effective prediction of the results of the interaction of electron beams with irradiation objects requires the most accurate information about ...
Eugene V. Oleinikov, David Chvátil, Eugene Yu. Remeta, Aleksandr I. Gomonai, Yurii Yu. Bilak   +4 more
doaj   +1 more source

Feasibility of convection‐enhanced delivery of unlabeled 225Ac for glioblastoma: Transport, dosimetry, and clonogenic survival modeling

Medical Physics, Volume 53, Issue 8, August 2026.
Abstract Background Glioblastoma (GB) is an aggressive primary brain tumor with local recurrence rates exceeding 90% and a five‐year survival rate of approximately 5%. Standard treatments such as surgical resection, external beam radiotherapy (EBRT), and chemotherapy often leave residual tumor cells that are resistant to therapy.
Maram El Sabri, Leyla Moghaddasi, Puthenparampil Wilson, Frank Saran, Eva Bezak   +4 more
wiley   +1 more source

The Geant4 Bertini Cascade [PDF]

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015
One of the medium energy hadron–nucleus interaction models in the Geant4 simulation toolkit is based partly on the Bertini intranuclear cascade model. Since its initial appearance in the toolkit, this model has been largely re-written in order to extend its physics capabilities and to reduce its memory footprint. Physics improvements include extensions
Wright, D.H., Kelsey, M.H.
openaire   +1 more source

Geant4-deoxyribonucleic Acid Simulation of Radiation-induced Deoxyribonucleic Acid Damage in a Human Cancer Cell Line

Journal of Medical Physics
Introduction: Ionizing radiation causes deoxyribonucleic acid (DNA) damage through both direct and indirect mechanisms. This study aimed to investigate and quantify the biological response of ion beams in biological matter and the radiation-induced DNA ...
Chee Keat Ying, Dousatsu Sakata, M. Arif Efendi   +2 more
doaj   +1 more source

Radiobiology studies of gold nanoparticle‐enhanced radiosensitization in proton therapy

Medical Physics, Volume 53, Issue 8, August 2026.
Abstract Background Approximately 50%$\%$ of newly diagnosed cancer patients worldwide receive radiotherapy, most commonly with X‐rays. Proton therapy has emerged as a promising alternative, offering complementary advantages over conventional X‐rays due to its highly localized energy deposition at the Bragg peak, thereby reducing radiation exposure to ...
N. Fuster‐Martínez, D. H. Saucedo‐Cuberes, M. C. Jiménez‐Ramos, D. Esperante, J. M. Espino, J. Fuster, J. F. Belén‐Aguilar, L. González‐López, P. Huertas, S. Jimeno, I. Mingarro, D. Pascual, D. Suárez‐García, M. J. García‐Murria   +13 more
wiley   +1 more source

An ion treatment planning framework for inclusion of nanodosimetric ionization detail through cluster dose

Medical Physics, Volume 53, Issue 8, August 2026.
Abstract Background Nanodosimetry relates the cumulative or statistical moments of Ionization Detail (ID) with biological endpoints of relevance to cancer radiotherapy using charged particles. This association suggests to develop an additional physics‐detailed layer of modeling that may complement biological modeling and treatment planning.
Simona Facchiano, Ramon Ortiz, Remo Cristoforetti, Naoki D‐Kondo, Oliver Jäkel, Bruce Faddegon, Niklas Wahl   +6 more
wiley   +1 more source

Research and Development of a Natural Radioactivity Detection System for Import and Export Goods

Journal of Isotopes
China imports a large amount of bulk minerals and rare metals every year，and during customs radiation monitoring，harmless alarms are often triggered due to the presence of natural radioactive elements (NORM) in the minerals.
Jian ZHAN, Jianfeng SHI, Yongming HOU, Yulai ZHENG, Chao LIU, Qiang WANG, Yong LI, Lianjun ZHANG, Nan WANG   +8 more
doaj   +1 more source

Photon minibeam‐based LATTICE radiotherapy for small and medium‐sized tumors: A dosimetric planning study

Medical Physics, Volume 53, Issue 8, August 2026.
Abstract Background Lattice radiotherapy (LRT) is a spatially fractionated technique that delivers three‐dimensional high‐dose vertices within tumors. However, conventional LRT is constrained by geometric limitations when applied to small and medium‐sized tumor volumes, primarily due to the large beam sizes that restrict optimal lattice pattern ...
Wei Wu, Nimita Shinde, Jiaxin Li, Isabelle Vanhaezebrouck, Kai Jiang, Yuting Lin, Qiang Li, Hao Gao   +7 more
wiley   +1 more source

Assessment of Spacecraft Internal Charging in the Earth's Outer Radiation Belt

Space Weather, Volume 24, Issue 8, August 2026.
Abstract The internal charging effects triggered by energetic (>100 keV) electrons in the Earth's radiation belts can cause anomalies and failures of electronic components aboard spacecraft. Given the critical importance of safeguarding space assets, it is essential to estimate internal charging risks, which depend highly on the distribution of ...
Yuan Lei, Xing Cao, Binbin Ni, Xueshang Feng, Xiaoyu Wang   +4 more
wiley   +1 more source

Sensitive Volume Modeling in Calculation of Space Radiation-Induced SEU Cross Section [PDF]

فصلنامه علوم و فناوری فضایی, 2014
Shape and size of sensitive volume are the most important parameters to model electronic devices for calculation of the SEU rate from space radiations. So far different models have been proposed for estimation of the sensitive volume.
S. Boorboor, S. A. H. Feghhi, H. Jafari
doaj