Cited time in webofscience Cited time in scopus

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dc.contributor.author Hou, Yingkun -
dc.contributor.author Park, Sang Hyun -
dc.contributor.author Wang, Qian -
dc.contributor.author Zhang, Jun -
dc.contributor.author Zong, Xiaopeng -
dc.contributor.author Lin, Weili -
dc.contributor.author Shen, Dinggang -
dc.date.available 2018-01-25T01:06:26Z -
dc.date.created 2017-09-11 -
dc.date.issued 2017-08 -
dc.identifier.issn 2045-2322 -
dc.identifier.uri http://hdl.handle.net/20.500.11750/5028 -
dc.description.abstract Perivascular spaces (PVSs) in brain have a close relationship with typical neurological diseases. The quantitative studies of PVSs are meaningful but usually difficult, due to their thin and weak signals and also background noise in the 7 T brain magnetic resonance images (MRI). To clearly distinguish the PVSs in the 7 T MRI, we propose a novel PVS enhancement method based on the Haar transform of non-local cubes. Specifically, we extract a certain number of cubes from a small neighbor to form a cube group, and then perform Haar transform on each cube group. The Haar transform coefficients are processed using a nonlinear function to amplify the weak signals relevant to the PVSs and to suppress the noise. The enhanced image is reconstructed using the inverse Haar transform of the processed coefficients. Finally, we perform a block-matching 4D filtering on the enhanced image to further remove any remaining noise, and thus obtain an enhanced and denoised 7 T MRI for PVS segmentation. We apply two existing methods to complete PVS segmentation, i.e., (1) vesselness-Thresholding and (2) random forest classification. The experimental results show that the PVS segmentation performances can be significantly improved by using the enhanced and denoised 7 T MRI. © 2017 The Author(s). -
dc.language English -
dc.publisher Nature Publishing Group -
dc.title Enhancement of Perivascular Spaces in 7 T MR Image using Haar Transform of Non-local Cubes and Block-matching Filtering -
dc.type Article -
dc.identifier.doi 10.1038/s41598-017-09336-5 -
dc.identifier.wosid 000407864000036 -
dc.identifier.scopusid 2-s2.0-85027675467 -
dc.identifier.bibliographicCitation Scientific Reports, v.7, no.1 -
dc.description.isOpenAccess FALSE -
dc.subject.keywordPlus VIRCHOW-ROBIN SPACES -
dc.subject.keywordPlus SMALL VESSEL DISEASE -
dc.subject.keywordPlus BRAIN -
dc.subject.keywordPlus VISUALIZATION -
dc.subject.keywordPlus SEGMENTATION -
dc.citation.number 1 -
dc.citation.title Scientific Reports -
dc.citation.volume 7 -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.relation.journalResearchArea Science & Technology - Other Topics -
dc.relation.journalWebOfScienceCategory Multidisciplinary Sciences -
dc.type.docType Article -

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