Abstract
A preliminary investigation into the efficacy of a new 3D dosimetry material, RadGel™, for verification of radiation therapy dose distributions is presented. Small volumes of RadGel™ were found to exhibit a linear, reproducible response to dose. A gradual increase in optical-density (OD) with time was observed, suggesting scanning should be completed within 18 hours to keep a linear correlation of R2 > 0.99. A larger 10 cm diameter volume of RadGel™ was irradiated with a rotationally symmetric "spoke" plan designed to rigorously evaluate scanner/dosimeter combined performance. The dosimeter was imaged with the Duke Mid-sized Optical-CT Scanner (DMOS). Promising OD and corresponding dose maps were obtained. Edge artefacts were observed and are suspected to be exacerbated by the particular container used in this early study. Further studies will evaluate new containers and methods for refractive matching at the gel-container-fluid interface.
| Original language | English (US) |
|---|---|
| Article number | 012011 |
| Pages (from-to) | 49-53 |
| Number of pages | 5 |
| Journal | Journal of Physics: Conference Series |
| Volume | 250 |
| DOIs | |
| State | Published - Jan 1 2010 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Preliminary investigation of the dosimetric properties of 'RadGel'. / Newton, Joseph R; Thomas, A.; Appleby, A.; Marsden, C.; Christman, E. A.; Wolodzko, J. G.; Oldham, M.
In: Journal of Physics: Conference Series, Vol. 250, 012011, 01.01.2010, p. 49-53.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Preliminary investigation of the dosimetric properties of 'RadGel'
AU - Newton, Joseph R
AU - Thomas, A.
AU - Appleby, A.
AU - Marsden, C.
AU - Christman, E. A.
AU - Wolodzko, J. G.
AU - Oldham, M.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - A preliminary investigation into the efficacy of a new 3D dosimetry material, RadGel™, for verification of radiation therapy dose distributions is presented. Small volumes of RadGel™ were found to exhibit a linear, reproducible response to dose. A gradual increase in optical-density (OD) with time was observed, suggesting scanning should be completed within 18 hours to keep a linear correlation of R2 > 0.99. A larger 10 cm diameter volume of RadGel™ was irradiated with a rotationally symmetric "spoke" plan designed to rigorously evaluate scanner/dosimeter combined performance. The dosimeter was imaged with the Duke Mid-sized Optical-CT Scanner (DMOS). Promising OD and corresponding dose maps were obtained. Edge artefacts were observed and are suspected to be exacerbated by the particular container used in this early study. Further studies will evaluate new containers and methods for refractive matching at the gel-container-fluid interface.
AB - A preliminary investigation into the efficacy of a new 3D dosimetry material, RadGel™, for verification of radiation therapy dose distributions is presented. Small volumes of RadGel™ were found to exhibit a linear, reproducible response to dose. A gradual increase in optical-density (OD) with time was observed, suggesting scanning should be completed within 18 hours to keep a linear correlation of R2 > 0.99. A larger 10 cm diameter volume of RadGel™ was irradiated with a rotationally symmetric "spoke" plan designed to rigorously evaluate scanner/dosimeter combined performance. The dosimeter was imaged with the Duke Mid-sized Optical-CT Scanner (DMOS). Promising OD and corresponding dose maps were obtained. Edge artefacts were observed and are suspected to be exacerbated by the particular container used in this early study. Further studies will evaluate new containers and methods for refractive matching at the gel-container-fluid interface.
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U2 - 10.1088/1742-6596/250/1/012011
DO - 10.1088/1742-6596/250/1/012011
M3 - Article
VL - 250
SP - 49
EP - 53
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
M1 - 012011
ER -