| Improving non-contrast-enhanced steady-state free precession angiography with compressed sensing. | |
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MedLine Citation:
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PMID: 19230013 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Flow-independent angiography offers the ability to produce vessel images without contrast agents. Angiograms are acquired with magnetization-prepared three-dimensional balanced steady-state free precession sequences, where the phase encodes are interleaved and the preparation is repeated before each interleaf. The frequent repetition of the preparation significantly decreases the scan efficiency. The number of excitations can instead be reduced with compressed sensing by exploiting the compressibility of the angiograms. Hence, the phase encodes can be undersampled to save scan time without significantly degrading image quality. These savings can be allotted for preparing the magnetization more often, or alternatively, improving resolution. The enhanced resolution and contrast achieved with the proposed method are demonstrated with lower leg angiograms. Depiction of the vasculature is significantly improved with the increased resolution in the phase-encode plane and higher blood-to-background contrast. |
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Authors:
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Tolga Cukur; Michael Lustig; Dwight G Nishimura |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine Volume: 61 ISSN: 1522-2594 ISO Abbreviation: Magn Reson Med Publication Date: 2009 May |
Date Detail:
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Created Date: 2009-05-25 Completed Date: 2009-07-27 Revised Date: 2011-02-21 |
Medline Journal Info:
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Nlm Unique ID: 8505245 Medline TA: Magn Reson Med Country: United States |
Other Details:
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Languages: eng Pagination: 1122-31 Citation Subset: IM |
Copyright Information:
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(c) 2009 Wiley-Liss, Inc. |
Affiliation:
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Department of Electrical Engineering, Stanford University, Stanford, California 94305-9510, USA. cukur@stanford.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms* Data Compression / methods* Humans Image Enhancement / methods* Image Interpretation, Computer-Assisted / methods* Lower Extremity / blood supply* Magnetic Resonance Angiography / methods* Reproducibility of Results Sensitivity and Specificity Signal Processing, Computer-Assisted* |
| Grant Support | |
ID/Acronym/Agency:
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R01 HL039297/HL/NHLBI NIH HHS; R01 HL039297-23/HL/NHLBI NIH HHS; R01 HL075803/HL/NHLBI NIH HHS; R01 HL075803-05/HL/NHLBI NIH HHS |
| Comments/Corrections | |
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