Results 241 to 250 of about 170,362 (288)

Gamma-ray spectra and absorbed doses measured at EuXFEL undulator system. [PDF]

J Synchrotron Radiat
Falowska-Pietrzak O, Hedqvist A, Hellberg F, Wolff-Fabris F, Bassler N.   +4 more
europepmc   +1 more source

Clinical evaluation of the aperture shape controller in volumetric modulated arc therapy: Effects on MLC and jaw motion complexity, plan quality, and deliverability. [PDF]

J Appl Clin Med Phys
Kamima T, Sato Y, Murakami Y, Takahashi T, Kaneko M, Watanabe S, Miyauchi H, Abo N, Ito Y, Toshiyasu T, Taguchi S, Harada A, Yoshioka Y.   +12 more
europepmc   +1 more source

Cross-modality Dosimetry Audit in Head-and-neck Radiotherapy: A Phantom-based Approach for Photon and Proton Beams. [PDF]

J Med Phys
Oonsiri S, Kingkaew S, Vimolnoch M, Chatchumnan N, Oonsiri P.   +4 more
europepmc   +1 more source

A method to determine the distance, shielding and activity of orphan 137Cs sources in mobile gamma spectrometric search. [PDF]

Radiat Prot Dosimetry
Rääf C, Jönsson M, Dinca MC, Finck R.
europepmc   +1 more source

Experimental and computational dosimetry in an integrated workflow for remote audits in Ir-192 interstitial brachytherapy: Development and pilot implementation. [PDF]

J Appl Clin Med Phys
Pappas EP, Peppa V, Drakopoulou A, Velissariou E, Thrapsanioti Z, Kollias G, Koutsouveli E, Lymperopoulou G, Karaiskos P.   +8 more
europepmc   +1 more source

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Are gamma passing rate and dose–volume histogram QA metrics correlated?

Medical Physics, 2021
AbstractPurposeThe quality of a measured distribution of dose delivered against its corresponding radiotherapy plan is routinely assessed by gamma index (GI) and dose–volume histogram (DVH) metrics. Any correlation between error detection rates, as based on either of these approaches, while argued, has never been convincingly demonstrated.
Mateusz, Baran, Zbisɫaw, Tabor, Monika, Tulik, Damian, Kabat, Krzysztof, Rzecki, Tomasz, Sośnicki, Michael, Waligórski   +6 more
openaire   +2 more sources

Unbiased evaluation of predicted gamma passing rate by an event‐mixing technique

Medical Physics, 2023
AbstractBackgroundPredicting models of the gamma passing rate (GPR) have been studied to substitute the measurement‐based gamma analysis. Since these studies used data from different radiotherapy systems comprising TPS, linear accelerator, and detector array, it has been difficult to compare the performances of the predicting models among institutions ...
Akito S, Koganezawa, Takaaki, Matsuura, Daisuke, Kawahara, Takeo, Nakashima, Eiji, Shiba, Yuji, Murakami, Yasushi, Nagata   +6 more
openaire   +2 more sources

Evaluation of the dataset quality in gamma passing rate predictions using machine learning methods

The British Journal of Radiology, 2023
Objective: Gamma passing rate (GPR) predictions using machine learning methods have been explored for treatment verification of radiotherapy plans. However, these methods presented datasets with unbalanced number of plans having different treatment conditions (heterogeneous datasets), such as anatomical sites or dose per fractions, leading to lower ...
Paulo Quintero, David Benoit, Yongqiang Cheng, Craig Moore, Andrew Beavis   +4 more
openaire   +2 more sources

Predicting gamma passing rates for portal dosimetry‐based IMRT QA using machine learning

Medical Physics, 2019
PurposeIntensity‐modulated radiation therapy (IMRT) quality assurance (QA) measurements are routinely performed prior to treatment delivery to verify dose calculation and delivery accuracy. In this work, we applied a machine learning‐based approach to predict portal dosimetry based IMRT QA gamma passing rates.Methods182 IMRT plans for various treatment
Dao, Lam, Xizhe, Zhang, Harold, Li, Yang, Deshan, Brayden, Schott, Tianyu, Zhao, Weixiong, Zhang, Sasa, Mutic, Baozhou, Sun   +8 more
openaire   +2 more sources