The Given names of the author Alma Mariana Fuentes-González was incorrectly tagged in original publication and corrected here. The original article has been corrected.
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Experimental characterization of four ionization chamber types in magnetic fields including intra-type variation.
Phys Imaging Radiat Oncol
January 2024
Section for Biomedical Physics, Department of Radiation Oncology, University Hospital Tübingen, Tübingen, Germany.
Background And Purpose: For dosimetry in magnetic resonance (MR) guided radiotherapy, assessing the magnetic field correction factors of air-vented ionization chambers is crucial. Novel MR-optimized chambers reduce MR-imaging artefacts, enhancing their quality assurance utility. This study aimed to characterize two new MR-optimized ionization chambers with sensitive volumes of 0.
View Article and Find Full Text PDFExperimental and Monte Carlo-based determination of magnetic field correction factors in high-energy photon fields for two ionization chambers.
Med Phys
July 2023
Institute for Medical Physics and Radiation Protection, University of Applied Sciences Giessen, Giessen, Germany.
Background: The integration of magnetic resonance tomography into clinical linear accelerators provides high-contrast, real-time imaging during treatment and facilitates online-adaptive workflows in radiation therapy treatments. The associated magnetic field also bends the trajectories of charged particles via the Lorentz force, which may alter the dose distribution in a patient or a phantom and affects the dose response of dosimetry detectors.
Purpose: To perform an experimental and Monte Carlo-based determination of correction factors , which correct the response of ion chambers in the presence of external magnetic fields in high-energy photon fields.
A finite element method for the determination of the relative response of ionization chambers in MR-linacs: simulation and experimental validation up to 1.5 T.
Phys Med Biol
July 2019
Physikalisch-Technische Bundesanstalt, Braunschweig, Germany. University Hospital Tübingen, Biomedical Physics, Tübingen, Germany. Author to whom correspondence should be addressed.
In magnetic resonance (MR) guided radiotherapy, the magnetic field-dependent change in the dose response of ionization chambers is typically included by means of a correction factor [Formula: see text]. This factor can be determined experimentally or calculated by means of Monte Carlo (MC) simulations. To date, a small number of experimental values for [Formula: see text] at magnetic flux densities above 1.
View Article and Find Full Text PDFCorrection to: Intratype variants of the E2 protein from human papillomavirus type 18 induce different gene expression profiles associated with apoptosis and cell proliferation.
Arch Virol
July 2019
Unidad de Investigación Biomédica en Cáncer, Instituto Nacional de Cancerología, México/Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Av. San Fernando No. 22, Col. Sección XVI, Tlalpan, 14080, Mexico City, Mexico.
The Given names of the author Alma Mariana Fuentes-González was incorrectly tagged in original publication and corrected here. The original article has been corrected.
View Article and Find Full Text PDFSSU rDNA divergence in planktonic foraminifera: molecular taxonomy and biogeographic implications.
PLoS One
May 2015
Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5023: Ecologie des Hydrosystèmes Fluviaux, Université Lyon 1, Villeurbanne, France; Institut Universitaire de France, Paris, France.
The use of planktonic foraminifera in paleoceanography requires taxonomic consistency and precise assessment of the species biogeography. Yet, ribosomal small subunit (SSUr) DNA analyses have revealed that most of the modern morpho-species of planktonic foraminifera are composed of a complex of several distinct genetic types that may correspond to cryptic or pseudo-cryptic species. These genetic types are usually delimitated using partial sequences located at the 3'end of the SSUrDNA, but typically based on empirical delimitation.
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