Effect of hierarchical deformable motion compensation on image enhancement for DSA acquired via C-ARM

Liyang Wei, Dinggang Shen, Dinesh Kumar, Ram Turlapati, Jasjit S. Suri

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

1 Citation (Scopus)

Abstract

DSA images suffer from challenges like system X-ray noise and artifacts due to patient movement. In this paper, we present a two-step strategy to improve DSA image quality. First, a hierarchical deformable registration algorithm is used to register the mask frame and the bolus frame before subtraction. Second, the resulted DSA image is further enhanced by background diffusion and nonlinear normalization for better visualization. Two major changes are made in the hierarchical deformable registration algorithm for DSA images: 1) B-Spline is used to represent the deformation field in order to produce the smooth deformation field; 2) two features are defined as the attribute vector for each point in the image, i.e., original image intensity and gradient. Also, for speeding up the 2D image registration, the hierarchical motion compensation algorithm is implemented by a multi-resolution framework. The proposed method has been evaluated on a database of 73 subjects by quantitatively measuring signal-to-noise (SNR) ratio. DSA embedded with proposed strategies demonstrates an improvement of 74.1% over conventional DSA in terms of SNR. Our system runs on Eigen's DSA workstation using C++ in Windows environment.

Original languageEnglish
Title of host publicationProceedings of SPIE-IS and T Electronic Imaging -Image Processing
Subtitle of host publicationAlgorithms and Systems VI
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventImage Processing: Algorithms and Systems VI - San Jose, CA, United States
Duration: 2008 Jan 282008 Jan 29

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6812
ISSN (Print)0277-786X

Other

OtherImage Processing: Algorithms and Systems VI
CountryUnited States
CitySan Jose, CA
Period08/1/2808/1/29

Keywords

  • DSA
  • Diffusion
  • Hierarchical deformable registration
  • Nonlinear normalization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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