Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Christina Vallhagen Dahlgren"'
Autor:
Anneli Edvardsson, Jenny Gorgisyan, Karin M. Andersson, Christina Vallhagen Dahlgren, Alexandru Dasu, Daniel Gram, Thomas Björk-Eriksson, Per Munck af Rosenschöld
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 29, Iss , Pp 100555- (2024)
Background and Purpose: Hippocampal-sparing (HS) is a method that can potentially reduce late cognitive complications for pediatric medulloblastoma (MB) patients treated with craniospinal proton therapy (PT). The aim of this study was to investigate
Externí odkaz:
https://doaj.org/article/38117daa34f04ea085f5cfd0e47727fb
Autor:
Nils Peters, Vicki Trier Taasti, Benjamin Ackermann, Alessandra Bolsi, Christina Vallhagen Dahlgren, Malte Ellerbrock, Francesco Fracchiolla, Carles Gomà, Joanna Góra, Patricia Cambraia Lopes, Ilaria Rinaldi, Koen Salvo, Ivanka Sojat Tarp, Alessandro Vai, Thomas Bortfeld, Antony Lomax, Christian Richter, Patrick Wohlfahrt
Publikováno v:
Peters, N, Trier Taasti, V, Ackermann, B, Bolsi, A, Vallhagen Dahlgren, C, Ellerbrock, M, Fracchiolla, F, Gomà, C, Góra, J, Cambraia Lopes, P, Rinaldi, I, Salvo, K, Sojat Tarp, I, Vai, A, Bortfeld, T, Lomax, A, Richter, C & Wohlfahrt, P 2023, ' Consensus guide on CT-based prediction of stopping-power ratio using a Hounsfield look-up table for proton therapy ', Radiotherapy and Oncology, vol. 184, 109675 . https://doi.org/10.1016/j.radonc.2023.109675
Background and purpose: Studies have shown large variations in stopping-power ratio (SPR) prediction from computed tomography (CT) across European proton centres. To standardise this process, a step-by-step guide on specifying a Hounsfield look-up ta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cde091e4de0d431a9879589294a575c3
https://pure.au.dk/portal/da/publications/consensus-guide-on-ctbased-prediction-of-stoppingpower-ratio-using-a-hounsfield-lookup-table-for-proton-therapy(0f833db5-91e1-439c-8cad-765a81d4d640).html
https://pure.au.dk/portal/da/publications/consensus-guide-on-ctbased-prediction-of-stoppingpower-ratio-using-a-hounsfield-lookup-table-for-proton-therapy(0f833db5-91e1-439c-8cad-765a81d4d640).html
Autor:
Christina Vallhagen Dahlgren, Per Thunberg, Anders Ahnesjö, Karin M. Andersson, Johan Reizenstein, Yang Cao
Publikováno v:
Medical Physics. 45:4329-4344
Purpose: To evaluate two commercial CT metal artifact reduction (MAR) algorithms for use in proton treatment planning in the head and neck (H&N) area. Methods: An anthropomorphic head phantom with removable metallic implants (dental fillings or neck
Publikováno v:
Journal of Applied Clinical Medical Physics
Metal objects in the body such as hip prostheses cause artifacts in CT images. When CT images degraded by artifacts are used for treatment planning of radiotherapy, the artifacts can yield inaccurate dose calculations and, for particle beams, erroneo
Autor:
J. Dubeau, Sanjeeva Witharana, Lalageh Mirzakhanian, Christina Vallhagen Dahlgren, R Maglieri, Shirin A. Enger, John Kildea
Publikováno v:
Medical Physics. 43:4941-4942
We describe the measurements of neutron spectra that we undertook around a scanning proton beam at the Skandion proton therapy clinic in Uppsala, Sweden. Measurements were undertaken using an extended energy range Nested Neutron Spectrometer (NNS, De
Autor:
Christina Vallhagen Dahlgren, Anders Montelius, Erik Grusell, Ulf Isacsson, Anders Ahnesjö, Mikael Saxner, Stefan Lorin, Kellie R. Russell, Bengt Glimelius
Publikováno v:
Physics in Medicine and Biology. 45:9-27
The implementation of two algorithms for calculating dose distributions for radiation therapy treatment planning of intermediate energy proton beams is described. A pencil kernel algorithm and a depth penetration algorithm have been incorporated into
Publikováno v:
Physics in medicine and biology. 51(2)
Two different commercial electronic portal imaging devices (EPIDs), one based on a liquid ion chamber matrix and the other based on a fluoroscopic CCD camera, were used to acquire readings that, through a calibration procedure, provided images propor
Portal dose image verification: formalism and application of the collapsed cone superposition method
Publikováno v:
Physics in medicine and biology. 47(24)
A formalism tailored for portal dose image verification is proposed to facilitate the comparison of calculated and measured portal dose distributions. Each portal image is converted into a dose proportional image and normalized to the reference beam
Publikováno v:
The Use of Computers in Radiation Therapy ISBN: 9783540671763
Electronic Portal Imaging Devices (EPIDs) are important for verification of patient position during radiotherapy. Their use for dosimetrical verification is likely to increase in the future with increasing treatment complexity and improved detectors.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::190eb0c049ee126caee1af2e9a256df6
https://doi.org/10.1007/978-3-642-59758-9_84
https://doi.org/10.1007/978-3-642-59758-9_84
Publikováno v:
Mutation research. 384(1)
Samples of human whole blood from 8 different donors were incubated with physiological saline or N-acetyl-L-cysteine (NAC, 1 x 10(-3) M) before being irradiated in vitro with high-energy X-rays (0.7 or 2.0 Gy). Primary DNA damage was evaluated in iso