Results 71 to 80 of about 1,099 (156)

Neutron Computed Tomography: A Novel High‐Resolution, Non‐Destructive Method for Screening Fossil Coral for Diagenetic Alteration for Geochronologic and Paleoclimatic Reconstructions

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract A novel high‐resolution, non‐destructive method for diagenetic screening of fossil corals for geochronologic and paleoclimatic studies using neutron computed tomography (NCT) is proposed. NCT circumvents limitations of traditional techniques, such as destructive sampling and 2‐D imaging by providing detailed 3‐D visualizations of coral ...
Carra Williams, Jody M. Webster, Joseph J. Bevitt, Gregory E. Webb, Luke D. Nothdurft, Victorien Paumard, Helen McGregor, Richard J. Murphy   +7 more
wiley   +1 more source

Hybrid phantom for lung CT: Design and validation

Medical Physics, Volume 52, Issue 8, August 2025.
Abstract Background CT lung imaging protocols need to be optimized. This claim is especially important due to the possible introduction of low‐dose CT (LDCT) for lung cancer screening. Given the incorporation of non‐linear reconstructions and post‐processing, the use of phantoms that consider task‐based evaluation is needed.
Paulo Roberto Costa, Gisell Ruiz Boiset, Elsa Bifano Pimenta, Raphael Moratta Vieira Rocha, Raissa Aline Santos Moura, Wagner Henrique Marques, Luuk J. Oostveen, Bram Geurts, Marcio Valente Yamada Sawamura, Denise Yanikian Nersissian, Elisabeth Mateus Yoshimura, Ioannis Sechopoulos   +11 more
wiley   +1 more source

Novel validation of HDR brachytherapy dosimetry for cervical cancer using egs_brachy Monte Carlo simulations: a comparative analysis with Oncentra treatment planning system

Journal of Applied Clinical Medical Physics, Volume 26, Issue 7, July 2025.
Abstract Purpose This study aims to validate HDR brachytherapy dosimetry for cervical cancer patients utilizing the egs_brachy Monte Carlo (MC) simulation. Methods Three cervical cancer patients treated with 192Ir HDR brachytherapy were included. Dose distributions were calculated by the Oncentra Brachy v4 treatment planning system (TPS) based on AAPM ...
Duong Thanh Tai, Nguyen Thi Anh Thu, Tran Thien Thanh, Pham Anh Tuan, Marc J. P. Chamberland, Peter Sandwall, David Bradley, James C. L. Chow   +7 more
wiley   +1 more source

Evaluation of the TG‐43 formalism for intraoperative radiotherapy dosimetry in glioblastoma treatment

Medical Physics, Volume 52, Issue 7, July 2025.
Abstract Background Intraoperative radiation therapy (IORT) using the INTRABEAM system has shown promise in glioblastoma treatment. However, accurate dosimetry remains challenging due to the low‐energy photons used and the heterogeneity of tissues in the brain. Current clinical practice relies on the TARGIT method, but more robust approaches, including
David Santiago Ayala Alvarez, Peter G. F. Watson, Marija Popovic, Veng Jean Heng, Michael D. C. Evans, Valerie Panet‐Raymond, Jan Seuntjens   +6 more
wiley   +1 more source

The Margin of Stability During a Single-Turn Pirouette in Female Amateur Dancers: A Pilot Study

Applied Sciences
Balance control in pirouettes has previously been characterized by constraint of the topple angle. However, there is a paucity of research using the margin of stability (MoS) as a dynamic measure of balance related to pirouettes.
Annalisa Dykstra, Ashley Kooistra, Nicole Merucci, David W. Zeitler, Gordon Alderink   +4 more
doaj   +1 more source

EVALUATING MULTI-LAYERED SHIELDS FOR LOW ENERGY PHOTONS USING MCNP5 CODE AND XCOM PROGRAM

, 2019
MCNP5 was used to evaluate the shielding properties of different composite shields made of combinations of four elements; Tungsten (W), Bismuth (Bi), Tin (Sn), and Zinc (Zn), at different weight ratios. Attenuation coefficients calculated by MCNP5 were compared with XCOM theoretical data for 11 different photon energies ranging from (15 -150 keV). Mass
Omyma G. Ibrahim, Dorrah, Mahmoud E., Metwally A. Qotb   +2 more
openaire   +1 more source

Investigation of photon interaction parameters in Human Body Tissues using GAMOS, FLUKA, and XCOM Studies

Nuclear Analysis
This study aims to evaluate different photon interaction parameters of human body organs at nine photon energies (0.021 keV–1.25 MeV) using GAMOS and FLUKA Monte Carlo codes. The Mass attenuation coefficients, Mean Free Path, Half Value Layer, Tenth Value Layer, and Mass absorption coefficients of the breast, lung, kidney, pancreas, liver, eye lens ...
A. Arectout, H. Boukhal, M. Jarmouni, K. Laazouzi, M. Assalmi, A. Nouayti, M. Hadouachi, H. El Yaakoubi, E. Chakir   +8 more
openaire   +2 more sources

Photon and neutron shielding performance of boron phosphate glasses for diagnostic radiology facilities

Results in Physics, 2019
This study focuses on radiation shielding characteristics of Li2O, Al2O3 and ZnO-doped boron phosphate glasses containing PbO and Bi2O3. Mass attenuation coefficient (μ/ρ) values of the glasses have been calculated using MCNPX code at various photon ...
H.O. Tekin, E.E. Altunsoy, E. Kavaz, M.I. Sayyed, O. Agar, M. Kamislioglu   +5 more
doaj   +1 more source

Ambulatory Estimation of XCoM using Pressure Insoles and IMUs

, 2018
Ambulatory gait assessment using minimal sensors has quite an impact for different applications requiring localised sensing. ForceShoes™ was developed as one such solution. It consists of two IMUs, and two 6DoF force and moment (F&M) sensors on each foot1. Additionally, an ultrasound system was added 2.
Mohamed Refai, Mohamed Irfan, van Beijnum, Bert-Jan, Buurke, Jaap H., Veltink, Peter H.   +3 more
openaire   +1 more source

The influence mechanism of radiation shielding functional ceramsite on the performance and microstructure of UHPC

Case Studies in Construction Materials
With the widespread application of nuclear energy technology, there is a growing demand for radiation-shielding building materials. Ultra-high-performance concrete (UHPC) stands out among many building materials for its superior mechanical properties and
Jun Yang, Jianyu Li, Gaozhan Zhang, Peng Zhou, Qingjun Ding, Mingming Wu   +5 more
doaj   +1 more source