Enhancement of mobile C-arm cone-beam reconstruction using prior anatomical models

Ofri Sadowsky, Junghoon Lee, Edward Grant Sutter, Simon J. Wall, Jerry Ladd Prince, Russell H Taylor

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

Abstract

We demonstrate an improvement to cone-beam tomographic imaging by using a prior anatomical model. A protocol for scanning and reconstruction has been designed and implemented for a conventional mobile C-arm: a 9 inch image-intensifier OEC-9600. Due to the narrow field of view (FOV), the reconstructed image contains strong truncation artifacts. We propose to improve the reconstructed images by fusing the observed x-ray data with computed projections of a prior 3D anatomical model, derived from a subject-specific CT or from a statistical database (atlas), and co-registered (3D/2D) to the x-rays. The prior model contains a description of geometry and radiodensity as a tetrahedral mesh shape and density polynomials, respectively. A CT-based model can be created by segmentation, meshing and polynomial fitting of the object's CT study. The statistical atlas is created through principal component analysis (PCA) of a collection of mesh instances deformably-registered (3D/3D) to patient datasets. The 3D/2D registration method optimizes a pixel-based similarity score (mutual information) between the observed x-rays and the prior. The transformation involves translation, rotation and shape deformation based on the atlas. After registration, the image intensities of observed and prior projections are matched and adjusted, and the two information sources are blended as inputs to a reconstruction algorithm. We demonstrate recostruction results of three cadaveric specimens, and the effect of fusing prior data to compensate for truncation. Further uses of hybrid reconstruction, such as compensation for the scan's limited arc length, are suggested for future research.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7258
DOIs
StatePublished - 2009
EventMedical Imaging 2009: Physics of Medical Imaging - Lake Buena Vista, FL, United States
Duration: Feb 9 2009Feb 12 2009

Other

OtherMedical Imaging 2009: Physics of Medical Imaging
CountryUnited States
CityLake Buena Vista, FL
Period2/9/092/12/09

Fingerprint

Anatomic Models
Atlases
Cones
cones
X-Rays
augmentation
X rays
mesh
polynomials
projection
Polynomials
Principal Component Analysis
Artifacts
x rays
image intensifiers
principal components analysis
approximation
Databases
Principal component analysis
field of view

Keywords

  • ALG
  • CTCB
  • RECON
  • SIM

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Cite this

Sadowsky, O., Lee, J., Sutter, E. G., Wall, S. J., Prince, J. L., & Taylor, R. H. (2009). Enhancement of mobile C-arm cone-beam reconstruction using prior anatomical models. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 7258). [72585B] https://doi.org/10.1117/12.813405

Enhancement of mobile C-arm cone-beam reconstruction using prior anatomical models. / Sadowsky, Ofri; Lee, Junghoon; Sutter, Edward Grant; Wall, Simon J.; Prince, Jerry Ladd; Taylor, Russell H.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7258 2009. 72585B.

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

Sadowsky, O, Lee, J, Sutter, EG, Wall, SJ, Prince, JL & Taylor, RH 2009, Enhancement of mobile C-arm cone-beam reconstruction using prior anatomical models. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 7258, 72585B, Medical Imaging 2009: Physics of Medical Imaging, Lake Buena Vista, FL, United States, 2/9/09. https://doi.org/10.1117/12.813405
Sadowsky O, Lee J, Sutter EG, Wall SJ, Prince JL, Taylor RH. Enhancement of mobile C-arm cone-beam reconstruction using prior anatomical models. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7258. 2009. 72585B https://doi.org/10.1117/12.813405
Sadowsky, Ofri ; Lee, Junghoon ; Sutter, Edward Grant ; Wall, Simon J. ; Prince, Jerry Ladd ; Taylor, Russell H. / Enhancement of mobile C-arm cone-beam reconstruction using prior anatomical models. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7258 2009.
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