Skip to main content
Journal cover image

Towards comprehensive characterization of Cs-137 Seeds using PRESAGE® dosimetry with optical tomography.

Publication ,  Conference
Adamson, J; Yang, Y; Rankine, L; Newton, J; Adamovics, J; Craciunescu, O; Oldham, M
Published in: J Phys Conf Ser
2013

We describe a method to directly measure the radial dose and anisotropy functions of brachytherapy sources using polyurethane based dosimeters read out with optical CT. We measured the radial dose and anisotropy functions for a Cs-137 source using a PRESAGE® dosimeter (9.5cm diameter, 9.2cm height) with a 0.35cm channel drilled for source placement. The dosimeter was immersed in water and irradiated to 5.3Gy at 1cm. Pre- and post-irradiation optical CT scans were acquired with the Duke Large field of view Optical CT Scanner (DLOS) and dose was reconstructed with 0.5mm isotropic voxel size. The measured radial dose factor matched the published fit to within 3% for radii between 0.5-3.0cm, and the anisotropy function matched to within 4% except for θ near 0° and 180° and radii >3cm. Further improvements in measurement accuracy may be achieved by optimizing dose, using the high dynamic range scanning capability of DLOS, and irradiating multiple dosimeters. Initial simulations indicate an 8 fold increase in dose is possible while still allowing sufficient light transmission during optical CT. A more comprehensive measurement may be achieved by increasing dosimeter size and flipping the source orientation between irradiations.

Duke Scholars

Published In

J Phys Conf Ser

DOI

ISSN

1742-6588

Publication Date

2013

Volume

444

Start / End Page

12100

Location

England

Related Subject Headings

  • 51 Physical sciences
  • 0299 Other Physical Sciences
  • 0204 Condensed Matter Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Adamson, J., Yang, Y., Rankine, L., Newton, J., Adamovics, J., Craciunescu, O., & Oldham, M. (2013). Towards comprehensive characterization of Cs-137 Seeds using PRESAGE® dosimetry with optical tomography. In J Phys Conf Ser (Vol. 444, p. 12100). England. https://doi.org/10.1088/1742-6596/444/1/012100
Adamson, J., Y. Yang, L. Rankine, J. Newton, J. Adamovics, O. Craciunescu, and M. Oldham. “Towards comprehensive characterization of Cs-137 Seeds using PRESAGE® dosimetry with optical tomography.” In J Phys Conf Ser, 444:12100, 2013. https://doi.org/10.1088/1742-6596/444/1/012100.
Adamson J, Yang Y, Rankine L, Newton J, Adamovics J, Craciunescu O, et al. Towards comprehensive characterization of Cs-137 Seeds using PRESAGE® dosimetry with optical tomography. In: J Phys Conf Ser. 2013. p. 12100.
Adamson, J., et al. “Towards comprehensive characterization of Cs-137 Seeds using PRESAGE® dosimetry with optical tomography.J Phys Conf Ser, vol. 444, 2013, p. 12100. Pubmed, doi:10.1088/1742-6596/444/1/012100.
Adamson J, Yang Y, Rankine L, Newton J, Adamovics J, Craciunescu O, Oldham M. Towards comprehensive characterization of Cs-137 Seeds using PRESAGE® dosimetry with optical tomography. J Phys Conf Ser. 2013. p. 12100.
Journal cover image

Published In

J Phys Conf Ser

DOI

ISSN

1742-6588

Publication Date

2013

Volume

444

Start / End Page

12100

Location

England

Related Subject Headings

  • 51 Physical sciences
  • 0299 Other Physical Sciences
  • 0204 Condensed Matter Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics