C-arm tracking by intensity-based registration of a fiducial in prostate brachytherapy

Pascal Fallavollita, Clif Burdette, Danny Y. Song, Purang Abolmaesumi, Gabor Fichtinger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Motivation: In prostate brachytherapy, intra-operative dosimetry optimization can be achieved through reconstruction of the implanted seeds from multiple C-arm fluoroscopy images. This process requires tracking of the C-arm poses. Methodology: We compute the pose of the C-arm relative to a stationary radiographic fiducial of known geometry. The fiducial was precisely fabricated. We register the 2D fluoroscopy image of the fiducial to a projected digitally reconstructed radiograph of the fiducial. The novelty of this approach is using image intensity alone without prior segmentation of the fluoroscopy image. Experiments and Results: Ground truth pose was established for each C-arm image using a published and clinically tested segmentation-based method. Using 111 clinical C-arm images and ±10° and ±10 mm random perturbation around the ground-truth pose, the average rotation and translation errors were 0.62° (std=0.31°) and 0.73 mm (std= 0.55mm), respectively. Conclusion: Fully automated segmentation-free C-arm pose estimation was found to be clinically adequate on human patient data.

Original languageEnglish (US)
Title of host publicationInformation Processing in Computer-Assisted Interventions - First International Conference, IPCAI 2010, Proceedings
Pages45-55
Number of pages11
DOIs
StatePublished - Dec 1 2010
Event1st International Conference on Information Processing in Computer-Assisted Interventions, IPCAI 2010 - Geneva, Switzerland
Duration: Jun 23 2010Jun 23 2010

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume6135 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

Other1st International Conference on Information Processing in Computer-Assisted Interventions, IPCAI 2010
Country/TerritorySwitzerland
CityGeneva
Period6/23/106/23/10

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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