Survey of 5 mm small‐field output factor measurements in Australia
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.12259
Abstract: Abstract The Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) held a comparison exercise in April 2016 where participants came to ARPANSA and measured the output factor of a nominal 5 mm cone attached to… read more here.
Keywords: output; field output; output factor; small field ... See more keywords
The polarity effect of compact ionization chambers used for small field dosimetry
Sign Up to like & getrecommendations! Published in 2018 at "Medical Physics"
DOI: 10.1002/mp.13227
Abstract: PURPOSE The recent developments of compact air-filled ionization chambers for use in small photon beams have raised the needs to address the associated polarity effect. The polarity effect of five compact ionization chambers has been… read more here.
Keywords: effect; polarity effect; polarity; small field ... See more keywords
The role of radiation‐induced charge imbalance on the dose‐response of a commercial synthetic diamond detector in small field dosimetry
Sign Up to like & getrecommendations! Published in 2019 at "Medical Physics"
DOI: 10.1002/mp.13542
Abstract: Purpose Discrepancy between experimental and Monte Carlo simulated dose–response of the microDiamond (mD) detector (type 60019, PTW Freiburg, Germany) at small field sizes has been reported. In this work, the radiation‐induced charge imbalance in the… read more here.
Keywords: detector; field; small field; charge imbalance ... See more keywords
A novel QA phantom based on scintillating fiber ribbons with implementation of 2D dose tomography for small‐field radiotherapy
Sign Up to like & getrecommendations! Published in 2022 at "Medical Physics"
DOI: 10.1002/mp.15902
Abstract: Abstract Purpose To develop a novel instrument for real‐time quality assurance (QA) procedures in radiotherapy. The system implements a scintillation‐based phantom and associated signal acquisition and processing modules and aims to monitor two‐dimensional (2D) dose… read more here.
Keywords: system; two step; fiber ribbons; small field ... See more keywords
Effect of angular dependence for small-field dosimetry using seven different detectors.
Sign Up to like & getrecommendations! Published in 2022 at "Medical physics"
DOI: 10.1002/mp.16198
Abstract: BACKGROUND Small-field dosimetry is challenging for radiotherapy dosimetry because of the loss of lateral charged equilibrium, partial occlusion of the primary photon source by the collimating devices, perturbation effects caused by the detector materials and… read more here.
Keywords: coplanar; small field; angular dependence; dosimetry ... See more keywords
On the field size definition and field output factors in small field dosimetry.
Sign Up to like & getrecommendations! Published in 2023 at "Medical physics"
DOI: 10.1002/mp.16262
Abstract: BACKGROUND There is a major conceptual difference between small-field and large field dosimetry i.e., different definition of the field size. The dosimetry protocol IAEA TRS-483 recommends the use of the field size defined by measured… read more here.
Keywords: field size; small field; output factors; size ... See more keywords
Internal supersymmetry and small-field Goldstini
Sign Up to like & getrecommendations! Published in 2017 at "Journal of High Energy Physics"
DOI: 10.1007/jhep05(2018)190
Abstract: A bstractThe dynamics of the Goldstino mode of spontaneously broken supersymmetry is universal, being fully determined by the non-linearly realized symmetry. We investigate the small-field limit of this theory. This model non-linearly realizes an alternative… read more here.
Keywords: non linearly; theory; field; supersymmetry ... See more keywords
A new algorithm for the small-field astrometric point-pattern matching problem
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Global Optimization"
DOI: 10.1007/s10898-018-0653-y
Abstract: The small-field astrometric point-pattern matching problem is a fundamental problem in astronomy, that although considered a long time ago still lacks a formal definition. It can be textually stated as: given two lists of positions… read more here.
Keywords: field astrometric; pattern matching; astrometric point; point pattern ... See more keywords
A multi-center output factor intercomparison to uncover systematic inaccuracies in small field dosimetry
Sign Up to like & getrecommendations! Published in 2018 at "Physics and Imaging in Radiation Oncology"
DOI: 10.1016/j.phro.2018.03.007
Abstract: Large uncertainties in output factor (OF) small fields dosimetry motivated multicentric studies. The focus of the study was the determination of the OFs, for different linacs and radiosurgery units, using new-generation detectors. Intercomparison studies between… read more here.
Keywords: systematic inaccuracies; small field; dosimetry; output factor ... See more keywords
Dosimetric characteristics of fabricated Ge-doped silica optical fibre for small-field dosimetry
Sign Up to like & getrecommendations! Published in 2019 at "Results in Physics"
DOI: 10.1016/j.rinp.2018.12.030
Abstract: Abstract We study 3 mm long germanium-doped (Ge-doped) silica fibres for small-field dosimetry, seeking to overcome spatial resolution and charged-particle disequilibrium issues, also any associated dose deviation from that of computerised treatment plan dose delivery. Investigation… read more here.
Keywords: fibre; small field; doped silica; field dosimetry ... See more keywords
Small field dosimetry correction factors for circular and MLC shaped fields with the CyberKnife M6 System: evaluation of the PTW 60023 microSilicon detector.
Sign Up to like & getrecommendations! Published in 2019 at "Physics in medicine and biology"
DOI: 10.1088/1361-6560/ab6154
Abstract: The PTW 60023 microSilicon is a new unshielded diode detector for small-field photon dosimetry. It provides improved water equivalence and a slightly larger sensitive region diameter in comparison to previous diode detectors in this range.… read more here.
Keywords: correction factors; diode; field; detector ... See more keywords