| Cerebral artery-vein separation using 0.1-Hz oscillation in dual-wavelength optical imaging. | |
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MedLine Citation:
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PMID: 21693415 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We present a novel artery-vein separation method using 0.1-Hz oscillation at two wavelengths with optical imaging of intrinsic signals (OIS). The 0.1-Hz oscillation at a green light wavelength of 546 nm exhibits greater amplitude in arteries than in veins and is primarily caused by vasomotion, whereas the 0.1-Hz oscillation at a red light wavelength of 630 nm exhibits greater amplitude in veins than in arteries and is primarily caused by changes of deoxyhemoglobin concentration. This spectral feature enables cortical arteries and veins to be segmented independently. The arteries can be segmented on the 0.1-Hz amplitude image at 546 nm using matched filters of a modified dual Gaussian model combining with a single Gaussian model. The veins are a combination of vessels segmented on both amplitude images at the two wavelengths using multiscale matched filters of single Gaussian model. Our method can separate most of the thin arteries and veins from each other, especially the thin arteries with low contrast in raw gray images. In vivo OIS experiments demonstrate the separation ability of the 0.1-Hz based segmentation method in cerebral cortex of eight rats. Two validation studies were undertaken to evaluate the performance of the method by quantifying the arterial and venous length based on a reference standard. The results indicate that our 0.1-Hz method is very effective in separating both large and thin arteries and veins regardless of vessel crossover or overlapping to great extent in comparison with previous methods. |
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Authors:
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Yucheng Wang; Dewen Hu; Yadong Liu; Ming Li |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2011-06-20 |
Journal Detail:
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Title: IEEE transactions on medical imaging Volume: 30 ISSN: 1558-254X ISO Abbreviation: IEEE Trans Med Imaging Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-11-30 Completed Date: 2012-04-02 Revised Date: 2012-04-24 |
Medline Journal Info:
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Nlm Unique ID: 8310780 Medline TA: IEEE Trans Med Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 2030-43 Citation Subset: IM |
Affiliation:
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National University of Defense Technology, Changsha 410073, China. wangyucheng@yahoo.cn |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms Animals Cerebral Arteries / anatomy & histology* Cerebral Cortex / blood supply Cerebral Veins / anatomy & histology* Diagnostic Imaging / methods* Hemodynamics Image Enhancement / methods* Male Optics and Photonics Rats Rats, Sprague-Dawley Regional Blood Flow / physiology Reproducibility of Results |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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