NDLI: Motion-compensated reconstruction of tomographic image sequences

Content Provider	IEEE Xplore Digital Library
Author	Gravier, E. Yang, Y.
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA (Gravier, E.; Yang, Y.)
Abstract	In this paper we study a motion-compensated approach for simultaneous reconstruction of image frames in a time sequence. We treat the frames in a sequence collectively as a single function of both space and time, and define a temporal prior to account for the temporal correlations in a sequence. This temporal prior is defined in a form of motion-compensation, aimed to follow the curved trajectories of the object motion through space-time. The image frames are then obtained through estimation using the expectation-maximization (EM) algorithm. The proposed algorithm was evaluated extensively using the 4D gated mathematical cardiac-torso (gMCAT) Dl.Ql phantom to simulate gated SPECT perfusion imaging with Tc99m. Our experimental results demonstrate that the use of motion compensation for reconstruction can lead to significant improvement in image quality and reconstruction accuracy.
Sponsorship	IEEE Signal Process. Soc
File Size	278361
File Format	PDF
ISBN	0780377508
ISSN	15224880
DOI	10.1109/ICIP.2003.1246803
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-14
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image reconstruction Image sequences Motion estimation Noise reduction Positron emission tomography Space technology Imaging phantoms Motion compensation Image quality Biomedical imaging
Content Type	Text
Resource Type	Article

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