FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2057623588> ?p ?o ?g. }

• W2057623588 endingPage "46" @default.
• W2057623588 startingPage "39" @default.
• W2057623588 abstract "A feasibility study is performed to evaluate the possibility of using the transit dose of portal images on the beam axis to measure the accuracy in dose delivery. The algorithm and the method are tested on a breast phantom and on patients with a breast disease.To estimate the transit dose at various air gaps behind the patient, a method is proposed which applies, for a given air gap, the inverse square law to the primary component of the exit dose and an experimentally determined function for the scatter component of the exit dose. It is assumed that the primary component and the scattered component of the exit dose are given by the treatment planning system. The experimental function for the variation of the scattered component with the air gap, determined by phantom measurements, is modelled by an analytical function which contains only field size, air gap and one energy-dependent parameter.The measurements on the breast phantom yield a maximum deviation between measured and estimated transit doses of 4.5%. The mean deviation is 0.9% with a standard deviation of the distribution of 2.3%. In vivo diode measurements on the same phantom yield a maximum deviation of 2.7%. Transit dose measurements on the beam axis for 45 portal images of breast patients show a mean deviation of 0.0% between the measured transit dose and the estimated transit dose. The standard deviation of the distribution is 4.4%. The method seems to be very sensitive to patient positioning and to discrepancies in breast thicknesses used for treatment planning.Preliminary results on breast patients show that the method proposed to evaluate transit doses on the beam axis from portal images may be a valuable alternative to conventional in vivo exit dosimetry. The method can be implemented in a simple way and does not require additional time during the irradiation session, as exit dosimetry with diodes does. The transit dose is only considered in one point. Nevertheless, in the framework of quality assurance of treatment delivery, this study is an example of the possibilities of monitoring at the same time the visual evaluation of the irradiated volume as well as the dosimetric control (i.e. in Gy) of treatment delivery with portal images." @default.
• W2057623588 created "2016-06-24" @default.
• W2057623588 creator A5021207802 @default.
• W2057623588 creator A5044695396 @default.
• W2057623588 creator A5057760676 @default.
• W2057623588 creator A5060345370 @default.
• W2057623588 date "2000-01-01" @default.
• W2057623588 modified "2023-10-14" @default.
• W2057623588 title "A method to estimate the transit dose on the beam axis for verification of dose delivery with portal images" @default.
• W2057623588 cites W1975670692 @default.
• W2057623588 cites W1976001166 @default.
• W2057623588 cites W1976431100 @default.
• W2057623588 cites W1977352093 @default.
• W2057623588 cites W1979676024 @default.
• W2057623588 cites W1983553133 @default.
• W2057623588 cites W2003863763 @default.
• W2057623588 cites W2017562293 @default.
• W2057623588 cites W2040033743 @default.
• W2057623588 cites W2040638479 @default.
• W2057623588 cites W2047201671 @default.
• W2057623588 cites W2048905010 @default.
• W2057623588 cites W2050763321 @default.
• W2057623588 cites W2071421285 @default.
• W2057623588 cites W2087217403 @default.
• W2057623588 cites W2106573314 @default.
• W2057623588 cites W2153555927 @default.
• W2057623588 doi "https://doi.org/10.1016/s0167-8140(99)00165-6" @default.
• W2057623588 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/10719698" @default.
• W2057623588 hasPublicationYear "2000" @default.
• W2057623588 type Work @default.
• W2057623588 sameAs 2057623588 @default.
• W2057623588 citedByCount "24" @default.
• W2057623588 countsByYear W20576235882014 @default.
• W2057623588 countsByYear W20576235882015 @default.
• W2057623588 countsByYear W20576235882016 @default.
• W2057623588 countsByYear W20576235882017 @default.
• W2057623588 countsByYear W20576235882018 @default.
• W2057623588 countsByYear W20576235882019 @default.
• W2057623588 countsByYear W20576235882021 @default.
• W2057623588 crossrefType "journal-article" @default.
• W2057623588 hasAuthorship W2057623588A5021207802 @default.
• W2057623588 hasAuthorship W2057623588A5044695396 @default.
• W2057623588 hasAuthorship W2057623588A5057760676 @default.
• W2057623588 hasAuthorship W2057623588A5060345370 @default.
• W2057623588 hasConcept C104293457 @default.
• W2057623588 hasConcept C105795698 @default.
• W2057623588 hasConcept C120665830 @default.
• W2057623588 hasConcept C121332964 @default.
• W2057623588 hasConcept C124017977 @default.
• W2057623588 hasConcept C168834538 @default.
• W2057623588 hasConcept C22679943 @default.
• W2057623588 hasConcept C2989005 @default.
• W2057623588 hasConcept C33923547 @default.
• W2057623588 hasConcept C38753444 @default.
• W2057623588 hasConcept C71924100 @default.
• W2057623588 hasConcept C74650414 @default.
• W2057623588 hasConceptScore W2057623588C104293457 @default.
• W2057623588 hasConceptScore W2057623588C105795698 @default.
• W2057623588 hasConceptScore W2057623588C120665830 @default.
• W2057623588 hasConceptScore W2057623588C121332964 @default.
• W2057623588 hasConceptScore W2057623588C124017977 @default.
• W2057623588 hasConceptScore W2057623588C168834538 @default.
• W2057623588 hasConceptScore W2057623588C22679943 @default.
• W2057623588 hasConceptScore W2057623588C2989005 @default.
• W2057623588 hasConceptScore W2057623588C33923547 @default.
• W2057623588 hasConceptScore W2057623588C38753444 @default.
• W2057623588 hasConceptScore W2057623588C71924100 @default.
• W2057623588 hasConceptScore W2057623588C74650414 @default.
• W2057623588 hasIssue "1" @default.
• W2057623588 hasLocation W20576235881 @default.
• W2057623588 hasLocation W20576235882 @default.
• W2057623588 hasOpenAccess W2057623588 @default.
• W2057623588 hasPrimaryLocation W20576235881 @default.
• W2057623588 hasRelatedWork W1980883121 @default.
• W2057623588 hasRelatedWork W1985573792 @default.
• W2057623588 hasRelatedWork W1991180196 @default.
• W2057623588 hasRelatedWork W2079285557 @default.
• W2057623588 hasRelatedWork W2137687570 @default.
• W2057623588 hasRelatedWork W2160534932 @default.
• W2057623588 hasRelatedWork W2461455056 @default.
• W2057623588 hasRelatedWork W3036272248 @default.
• W2057623588 hasRelatedWork W3094221632 @default.
• W2057623588 hasRelatedWork W2050150012 @default.
• W2057623588 hasVolume "54" @default.
• W2057623588 isParatext "false" @default.
• W2057623588 isRetracted "false" @default.
• W2057623588 magId "2057623588" @default.
• W2057623588 workType "article" @default.