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Prostate Brachytherapy Seed Reconstruction Using C-Arm Rotation Measurement and Motion Compensation

  • Ehsan Dehghan
  • Junghoon Lee
  • Mehdi Moradi
  • Xu Wen
  • Gabor Fichtinger
  • Septimiu E. Salcudean
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6361)

Abstract

During prostate brachytherapy, C-arm flouroscopy images are used for a qualitative assessment of the procedure. Three dimensional reconstruction of the implanted seeds can be used for intraoperative dosimetry and quantitative assessment. Accurate C-arm pose estimation is necessary for 3D localization of the seeds. We propose to measure the C-arm rotation angles and computationally compensate the inevitable C-arm translational motion to estimate the pose. We compensate the oscillation, sagging and wheel motion of the C-arm using a three-level optimization algorithm, without which the reconstruction can fail. We validated our approach on simulated and 10 data sets from 5 patients and gained on average 99.1% success rate, 0.33 mm projection error and computation time of less than one minute per patient, which are clinically excellent results.

Keywords

Motion Compensation 125I Seed Projection Error Prostate Brachytherapy Secondary Axis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Ehsan Dehghan
    • 1
  • Junghoon Lee
    • 2
  • Mehdi Moradi
    • 3
  • Xu Wen
    • 3
  • Gabor Fichtinger
    • 1
  • Septimiu E. Salcudean
    • 3
  1. 1.Queen’s UniversityCanada
  2. 2.Johns Hopkins UniversityUSA
  3. 3.University of British ColumbiaCanada

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