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Tracking brachytherapy sources using emission imaging with one flat panel detector.

Publication ,  Journal Article
Song, H; Bowsher, J; Das, S; Yin, F-F
Published in: Med Phys
April 2009

This work proposes to use the radiation from brachytherapy sources to track their dwell positions in three-dimensional (3D) space. The prototype device uses a single flat panel detector and a BB tray. The BBs are arranged in a defined pattern. The shadow of the BBs on the flat panel is analyzed to derive the 3D coordinates of the illumination source, i.e., the dwell position of the brachytherapy source. A kilovoltage x-ray source located 3.3 m away was used to align the center BB with the center pixel on the flat panel detector. For a test plan of 11 dwell positions, with an Ir-192 high dose rate unit, one projection was taken for each dwell point, and locations of the BB shadows were manually identified on the projection images. The 3D coordinates for the 11 dwell positions were reconstructed based on two BBs. The distances between dwell points were compared with the expected values. The average difference was 0.07 cm with a standard deviation of 0.15 cm. With automated BB shadow recognition in the future, this technique possesses the potential of tracking the 3D trajectory and the dwell times of a brachytherapy source in real time, enabling real time source position verification.

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Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

April 2009

Volume

36

Issue

4

Start / End Page

1109 / 1111

Location

United States

Related Subject Headings

  • X-Rays
  • Reproducibility of Results
  • Radiation Dosage
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Models, Statistical
  • Iridium Radioisotopes
  • Imaging, Three-Dimensional
  • Image Processing, Computer-Assisted
  • Humans
 

Citation

APA
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MLA
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Song, H., Bowsher, J., Das, S., & Yin, F.-F. (2009). Tracking brachytherapy sources using emission imaging with one flat panel detector. Med Phys, 36(4), 1109–1111. https://doi.org/10.1118/1.3081402
Song, Haijun, James Bowsher, Shiva Das, and Fang-Fang Yin. “Tracking brachytherapy sources using emission imaging with one flat panel detector.Med Phys 36, no. 4 (April 2009): 1109–11. https://doi.org/10.1118/1.3081402.
Song H, Bowsher J, Das S, Yin F-F. Tracking brachytherapy sources using emission imaging with one flat panel detector. Med Phys. 2009 Apr;36(4):1109–11.
Song, Haijun, et al. “Tracking brachytherapy sources using emission imaging with one flat panel detector.Med Phys, vol. 36, no. 4, Apr. 2009, pp. 1109–11. Pubmed, doi:10.1118/1.3081402.
Song H, Bowsher J, Das S, Yin F-F. Tracking brachytherapy sources using emission imaging with one flat panel detector. Med Phys. 2009 Apr;36(4):1109–1111.

Published In

Med Phys

DOI

ISSN

0094-2405

Publication Date

April 2009

Volume

36

Issue

4

Start / End Page

1109 / 1111

Location

United States

Related Subject Headings

  • X-Rays
  • Reproducibility of Results
  • Radiation Dosage
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Models, Statistical
  • Iridium Radioisotopes
  • Imaging, Three-Dimensional
  • Image Processing, Computer-Assisted
  • Humans