A papillary muscle guided motion estimation method for gated cardiac imaging

Jizhe Wang, George S.K. Fung, Tao Feng, Benjamin M.W. Tsui

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

Abstract

This research aims to develop a new feature guided motion estimation method for the left ventricular wall in gated cardiac imaging. The guiding feature is the "footprint" of one of the papillary muscles, which is the attachment of the papillary muscle on the endocardium. Myocardial perfusion (MP) PET images simulated from the 4-D XCAT phantom, which features papillary muscles, realistic cardiac motion with known motion vector field (MVF), were employed in the study. The 4-D MVF of the heart model of the XCAT phantom was used as a reference. For each MP PET image, the 3- D "footprint" surface of one of the papillary muscles was extracted and its centroid was calculated. The motion of the centroid of the "footprint" throughout a cardiac cycle was tracked and analyzed in 4-D. This motion was extrapolated to throughout the entire heart to build a papillary muscle guided initial estimation of the 4-D cardiac MVF. A previous motion estimation algorithm was applied to the simulated gated myocardial PET images to estimate the MVF. Three different initial MVF estimates were used in the estimation, including zero initial (0-initial), the papillary muscle guided initial (P-initial), and the true MVF from phantom (T-initial). Qualitative and quantitative comparison between the estimated MVFs and the true MVF showed the P-initial provided more accurate motion estimation in longitudinal motion than the 0-initial with over 70% improvement and comparable accuracy with that of the T-initial. We concluded that when the footprint can be tracked accurately, this feature guided approach will significantly improve the accuracy and robustness of traditional optical flow based motion estimation method.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2013
Subtitle of host publicationPhysics of Medical Imaging
DOIs
StatePublished - Jun 3 2013
EventMedical Imaging 2013: Physics of Medical Imaging - Lake Buena Vista, FL, United States
Duration: Feb 11 2013Feb 14 2013

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8668
ISSN (Print)1605-7422

Other

OtherMedical Imaging 2013: Physics of Medical Imaging
CountryUnited States
CityLake Buena Vista, FL
Period2/11/132/14/13

Keywords

  • Cardiac motion
  • Feature extraction
  • Motion vector field
  • Papillary muscle

ASJC Scopus subject areas

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

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  • Cite this

    Wang, J., Fung, G. S. K., Feng, T., & Tsui, B. M. W. (2013). A papillary muscle guided motion estimation method for gated cardiac imaging. In Medical Imaging 2013: Physics of Medical Imaging [86682G] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 8668). https://doi.org/10.1117/12.2007505