Results 81 to 90 of about 4,735 (211)

A dynamic anthropomorphic phantom for end‐to‐end testing in image‐ and surface‐guided adaptive radiotherapy

Medical Physics, Volume 52, Issue 11, November 2025.
Abstract Background Respiratory and digestive motion can compromise the accuracy of radiotherapy (RT), affecting tumor targeting and healthy tissue sparing. Current phantoms often fail to replicate complex organ movements and lack compatibility with advanced imaging modalities like magnetic resonance imaging (MRI) and 4D computed tomography (4DCT ...
Anahita Bakhtiari Moghaddam, A. Runz, R. Figueiredo Augusto, G. Echner, W. Johnen, R. Gabriel, P. Haering, C. Lang, S. Seeber, C. Murillo, B. Ackermann, R. Pestana, C. Beyer, F. Weykamp, M. Jochim, A. Qubala, V. Batista, O. Jäkel, C. P. Karger   +18 more
wiley   +1 more source

Assessment of radiographic screen-film systems: a comparison between the use of a microdensitometer and a drum film digitiser [PDF]

, 2017
A high-end drum film digitiser (Tango, Germany) and a calibrated linear microdensitometer developed by PTB were used to assess the modulation transfer function (MTF) and the noise power spectra (NPS) of 3 mammographic screen film systems at optical ...
Bergmann, D., Buhr, E., Pachoud, M., Verdun, F. R.   +3 more
core  

Investigating Technical Solutions to Improve the Near Real Time Measurement of Low‐Z Elements in Atmospheric Particulate Matter by Energy Dispersive X‐Ray Fluorescence Spectroscopy

X-Ray Spectrometry, Volume 54, Issue 6, Page 670-679, November/December 2025.
ABSTRACT The measurement of the elemental composition of atmospheric Particulate Matter (PM) is of paramount importance in air pollution studies, providing fundamental information for identifying aerosol sources and understanding their contributions.
Cosimo Fratticioli, Chiara Ruberto, Anna Mazzinghi, Giulia Calzolai, Luca Carraresi, Fabio Giardi, Franco Lucarelli, Marco Manetti, Silvia Nava, Francesco Taccetti, Massimo Chiari   +10 more
wiley   +1 more source

Dosimetry for New Radiation Therapy Approaches Using High Energy Electron Accelerators

Frontiers in Physics, 2020
We have performed dosimetry studies using electron beams with energies up to 50 MeV, which exceed current clinical energy ranges and approaches the bottom end of the very high energy electron range. 50 MeV electron beams can reach deep-seated tumors.
Karolina Kokurewicz, Andreas Schüller, Enrico Brunetti, Anna Subiel, Rafael Kranzer, Rafael Kranzer, Thomas Hackel, Markus Meier, Ralf-Peter Kapsch, Dino A. Jaroszynski   +9 more
doaj   +1 more source

Measurement of Collimator Scatter Factor for Photon Fields Using Gafchromic EBT2 Film and Ion Chamber [PDF]

, 2016
Background and Objective: In radiotherapy, measurement of the output factor in the air is one of the input parameters for Implementation of treatment planning systems and beam modeling.
Asgarian Dehkordy, Zeinab., Atarod, Maryam., Chegeni, Nahid., Eini, Fariba., Hoseini, Seyed Mohammad., Tahmasebi Birgan, Mohammad Javad.   +5 more
core  

A personalized tumor kV‐IORT navigation system based on hybrid twin

Journal of Applied Clinical Medical Physics, Volume 26, Issue 10, October 2025.
Abstract Purpose This study proposes a multidimensional hybrid twin navigation system to enhance applicator placement accuracy in low‐energy x‐ray intraoperative radiotherapy (kV‐IORT), particularly for less‐experienced practitioners. The system integrates augmented reality (AR) and digital twin technologies to improve intraoperative precision and ...
Shan Jiang, Shuo Yang, Zhiyong Yang, Daguang Zhang, Yingkai Luan, Zeyang Zhou   +5 more
wiley   +1 more source

Quality assurance procedures based on dosimetric, gamma analysis as a fast reliable tool for commissioning brachytherapy treatment planning systems

Radiology and Oncology, 2017
Fast and easily repeatable methods for commissioning procedures for brachytherapy (BT) treatment planning systems (TPS) are needed. Radiochromic film dosimetry with gamma analysis is widely used in external beam quality assurance (QA) procedures and ...
Zwierzchowski Grzegorz, Bieleda Grzegorz, Skowronek Janusz   +2 more
doaj   +1 more source

Backside Irradiation of Ultraviolet-A for Correcting Nonuniformity Error of Gafchromic XR-QA2 Films

Journal of Medical Physics
Purpose: Radiochromic film is used for quality assurance and quality control of X-ray equipment in the diagnostic radiology. In addition, three-dimensional dose distribution of computed tomography (CT) is measured.
Nobuyoshi Tanki, Sachiko Goto, Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Tadao Kuwano   +5 more
doaj   +1 more source

Effect of scanning parameters on dose-response of radiochromic films irradiated with photon and electron beams

Heliyon, 2018
Proper dosimetry settings are crucial in radiotherapy to ensure accurate radiation dose delivery. This work evaluated scanning parameters as affecting factors in reading the dose-response of EBT2 and EBT3 radiochromic films (RCFs) irradiated with ...
Nashrulhaq Tagiling, Raizulnasuha Ab Rashid, Siti Nur Amirah Azhan, Norhayati Dollah, Moshi Geso, Wan Nordiana Rahman   +5 more
doaj   +1 more source

Modeling kV X-ray-Induced Coloration in Radiochromic Films

Applied Sciences, 2018
Commercially available radiochromic films are primarily designed for clinical X-ray dosimetry. These films change color upon exposures to radiation as a result of solid-state polymerization (SSP).
Mehrdad Shahmohammadi Beni, Dragana Krstic, Dragoslav Nikezic, Kwan Ngok Yu   +3 more
doaj   +1 more source