NDLI: MRI Artifact Cancellation due to Unknown Respiratory Motion

Content Provider	IEEE Xplore Digital Library
Author	Eung-Kyeu Kim Young-Jae Lee
Copyright Year	2007
Description	Author affiliation: Div. of Inf. Commun. & Comput. Eng., Hanbat Nat. Univ. (Eung-Kyeu Kim)
Abstract	In this study, an improved post-processing technique for canceling MRI artifact due to unknown respiratory motion in the imaging plane is presented. Respiratory motion is modeled by a two dimensional linear expanding-shrinking movement. Assuming that the body tissues are incompressible fluid like materials, the proton density per unit volume of the imaging object is kept constant. According to the applied model, respiratory motion imposes phase error, non-uniform sampling and amplitude modulation distortions on the acquired MR data. When the motion parameters are known or can be estimated, a reconstruction algorithm based on bilinear superposition method was used to cancel the MRI artifact. In the case of motion parameters are unknown, first, the spectrum shift method is applied to find the respiratory fluctuation function, x directional expansion coefficient and x directional expansion center. Next, y directional expansion coefficient and y directional expansion center are estimated by using the minimum energy method. Finally, the validity of this proposed method is shown to be effective by using the simulated motion images.
Starting Page	389
Ending Page	394
File Size	6964200
Page Count	6
File Format	PDF
ISBN	9788955191318
ISSN	17389445
DOI	10.1109/ICACT.2007.358378
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-02-12
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	ETRI, NIA
Subject Keyword	Magnetic resonance imaging Biomedical imaging High-resolution imaging Data acquisition Motion estimation Protons Medical diagnostic imaging Humans Signal to noise ratio Gastrointestinal tract Artifact cancellation MRI Non uniform sampling Spectrum shift
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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