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pubmed-article:15690515pubmed:abstractTextSegmented cine MRI generally requires breath-holding, which can be problematic for many patients. Navigator echo techniques, particularly successful for free-breathing coronary MRA, are incompatible with the acquisition strategies and SSFP pulse sequences commonly used for cine MRI. The purpose of this work is to introduce a new self-gating technique deriving respiratory gating information directly from the raw imaging data acquired for segmented cine MRI. The respiratory self-gating technique uses interleaved radial k-space sampling to provide low-resolution images in real time during the free-breathing acquisition that are compared to target expiration images. Only the raw data-producing images with high correlation to the target images are included in the final high-resolution reconstruction. The self-gating technique produced cine series with no significant differences in quantitative image sharpness to series produced using comparable breath-held techniques. Because of the difficulties associated with breath-holding, the respiratory self-gating technique represents an important practical advance for cardiac MRI. , Inc.lld:pubmed
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pubmed-article:15690515pubmed:copyrightInfoCopyright 2004 Wiley-Liss, Inc.lld:pubmed
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pubmed-article:15690515pubmed:articleTitlePreliminary investigation of respiratory self-gating for free-breathing segmented cine MRI.lld:pubmed
pubmed-article:15690515pubmed:affiliationDepartment of Biomedical Engineering, NorthWestern University, Chicago, IL 60611, USA. alarson@radiology.northwestern.edulld:pubmed
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