Motion-compensated reconstruction for limited-angle multiphase cardiac CT

Mingwu Jin, Cong Zhao, Xun Jia, Lifeng Yu

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

Abstract

ECG-gated multiphase cardiac CT (MP-CCT) is free of motion artifacts and can provide the extra information of cardiac functions for the diagnosis of coronary artery disease. Used majority as a screening tool, the excessive radiation dose becomes a concern of MP-CCT. In this work, we propose a motion-compensated reconstruction method for MP-CCT with the limited angle acquisition for each phase in order to substantially reduce the radiation dose. MP-CCT of the XCAT phantom with eight cardiac phases was simulated with 90° coverage for each phase. The motion was estimated from images reconstructed by combining projections from two phases (for a full 180° coverage). To reconstruct the image at phase k, the motion fields were used to warp images at phase k to phase j (j = 1∼8 and j ≠ k) so that all projection data could be used for a total variation (TV) constrained reconstruction. The results show that TV reconstruction for each cardiac phase independently (TV-Single Phase) suffered severe limited-angle artifacts. TV reconstruction with two-phase projections (TV-Two Phases) improved the image quality and was suitable for good motion estimation. Motion-compensated TV reconstruction (TV-MC) achieved almost artifact-free images, although some motion errors could be seen. The root mean square error values are 254 HU, 64 HU and 47 HU for TV-Single Phase, TV-Two Phases, and TV-MC, respectively.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2018
Subtitle of host publicationPhysics of Medical Imaging
EditorsTaly Gilat Schmidt, Guang-Hong Chen, Joseph Y. Lo
PublisherSPIE
Volume10573
ISBN (Electronic)9781510616356
DOIs
StatePublished - Jan 1 2018
EventMedical Imaging 2018: Physics of Medical Imaging - Houston, United States
Duration: Feb 12 2018Feb 15 2018

Other

OtherMedical Imaging 2018: Physics of Medical Imaging
CountryUnited States
CityHouston
Period2/12/182/15/18

Fingerprint

Dosimetry
Motion estimation
Electrocardiography
Mean square error
Image quality
Screening
Artifacts
artifacts
projection
Radiation
coronary artery disease
dosage
root-mean-square errors
Coronary Artery Disease
radiation
acquisition
screening

Keywords

  • limited angle acquisition
  • motion-compensated reconstruction
  • Multiphase cardiac CT (MP-CCT)
  • radiation dose reduction

ASJC Scopus subject areas

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

Cite this

Jin, M., Zhao, C., Jia, X., & Yu, L. (2018). Motion-compensated reconstruction for limited-angle multiphase cardiac CT. In T. G. Schmidt, G-H. Chen, & J. Y. Lo (Eds.), Medical Imaging 2018: Physics of Medical Imaging (Vol. 10573). [1057333] SPIE. https://doi.org/10.1117/12.2294922

Motion-compensated reconstruction for limited-angle multiphase cardiac CT. / Jin, Mingwu; Zhao, Cong; Jia, Xun; Yu, Lifeng.

Medical Imaging 2018: Physics of Medical Imaging. ed. / Taly Gilat Schmidt; Guang-Hong Chen; Joseph Y. Lo. Vol. 10573 SPIE, 2018. 1057333.

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

Jin, M, Zhao, C, Jia, X & Yu, L 2018, Motion-compensated reconstruction for limited-angle multiphase cardiac CT. in TG Schmidt, G-H Chen & JY Lo (eds), Medical Imaging 2018: Physics of Medical Imaging. vol. 10573, 1057333, SPIE, Medical Imaging 2018: Physics of Medical Imaging, Houston, United States, 2/12/18. https://doi.org/10.1117/12.2294922
Jin M, Zhao C, Jia X, Yu L. Motion-compensated reconstruction for limited-angle multiphase cardiac CT. In Schmidt TG, Chen G-H, Lo JY, editors, Medical Imaging 2018: Physics of Medical Imaging. Vol. 10573. SPIE. 2018. 1057333 https://doi.org/10.1117/12.2294922
Jin, Mingwu ; Zhao, Cong ; Jia, Xun ; Yu, Lifeng. / Motion-compensated reconstruction for limited-angle multiphase cardiac CT. Medical Imaging 2018: Physics of Medical Imaging. editor / Taly Gilat Schmidt ; Guang-Hong Chen ; Joseph Y. Lo. Vol. 10573 SPIE, 2018.
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