A sinogram based technique for image correction and removal of metal clip artifacts in cone beam breast CT

T. Wang, Y. Shen, Y. Zhong, C. J. Lai, J. Wang, C. C. Shaw

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

Abstract

Cone beam CT (CBCT) technique provides true three-dimensional (3D) images of a breast; however, metal clips and needles used for surgical planning can cause artifacts, which may extend to many adjacent slices, in the reconstructed images obtained by the Feldkamp-Davis-Kress (FDK) filtered backprojection method, In this paper, a sinogram based method to remove the metal clips in the projection image data is described and discussed for improving the quality of reconstructed breast images. First, the original projection data was reconstructed using the FDK algorithm to obtain a volumetric image with metal clips and artifacts. Second, the volumetric image was segmented by using the threshold method to obtain a 3D map of metal objects. Third, a forward projection algorithm is applied to the metal object map to obtain projection map of metal objects. Finally, the original projection images and projection map of metal objects are reorganized into sinograms for correction in the angular space on a pixel-by-pixel basis. Cone beam CT images of a mastectomy breast specimen are used to demonstrate the feasibility of using this technique for removal of metal object artifacts. Preliminary results have demonstrated that metal objects artifacts in 3D images were reduced and the image quality were improved.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2014
Subtitle of host publicationPhysics of Medical Imaging
PublisherSPIE
ISBN (Print)9780819498267
DOIs
StatePublished - Jan 1 2014
EventMedical Imaging 2014: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 17 2014Feb 20 2014

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume9033
ISSN (Print)1605-7422

Other

OtherMedical Imaging 2014: Physics of Medical Imaging
CountryUnited States
CitySan Diego, CA
Period2/17/142/20/14

Keywords

  • breast imaging
  • cone beam CT
  • metal artifacts correction

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'A sinogram based technique for image correction and removal of metal clip artifacts in cone beam breast CT'. Together they form a unique fingerprint.

  • Cite this

    Wang, T., Shen, Y., Zhong, Y., Lai, C. J., Wang, J., & Shaw, C. C. (2014). A sinogram based technique for image correction and removal of metal clip artifacts in cone beam breast CT. In Medical Imaging 2014: Physics of Medical Imaging [90332S] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 9033). SPIE. https://doi.org/10.1117/12.2043927