Inter-comparison of phantoms for CT numbers to relative electron density (RED)/physical density calibration and influence to dose calculation in TPS
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00064203%3A_____%2F19%3A10395254" target="_blank" >RIV/00064203:_____/19:10395254 - isvavai.cz</a>
Alternative codes found
RIV/86652052:_____/19:N0000003
Result on the web
<a href="https://doi.org/10.1088/1742-6596/1248/1/012046" target="_blank" >https://doi.org/10.1088/1742-6596/1248/1/012046</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1742-6596/1248/1/012046" target="_blank" >10.1088/1742-6596/1248/1/012046</a>
Alternative languages
Result language
angličtina
Original language name
Inter-comparison of phantoms for CT numbers to relative electron density (RED)/physical density calibration and influence to dose calculation in TPS
Original language description
Six different phantoms (2x CIRS, 1x Agmeco, 1x QUASAR, 1x Gammex, 1x CatPhan) and Varian formulas were used to evaluate their suitability for CT numbers to relative electron density (RED) calibration in the treatment planning system at two centres using two CT scanners. The variability in calibration curve and the influence to dose calculation in the TPS were estimated for 6 MV and 18 MV. The presence of scattering material around inhomogeneities and influence of CT spectra (90 kV, 120 kV, 140 kV) were evaluated. All phantoms were found convenient for calibration except CatPhan where large deviations were observed for dense bone. Phantoms without scatter material around inhomogeneities should be used with caution. Varian formula slightly overestimates calibration curve in the region of 200 - 300 HU. The tolerance level of 10% suggested for RED during commissioning is reasonable as it can cause change in dose of 3% and 1.5% for 6 MV and 18 MV respectively as a very conservative estimate. Calibration curves should be acquired for all scanning protocols with different CT spectra.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
30204 - Oncology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Journal of Physics: Conference Series
ISBN
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ISSN
1742-6588
e-ISSN
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Number of pages
6
Pages from-to
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Publisher name
Institute of Physics Publishing
Place of publication
Bristol
Event location
Kuala Lumpur
Event date
Nov 11, 2018
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000492968100046