| Magnetic resonance spectroscopic imaging for visualization and correction of distortions in MRI: high precision applications in neurosurgery. | |
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MedLine Citation:
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PMID: 9858284 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We present a method for the quantification and correction of geometrical/intensity distortions of magnetic resonance images predominantly caused by bulk magnetic susceptibility shifts due to susceptibility heterogeneities of measured biologic tissues and shape of the object under investigation. The method includes precise and fast measurements of the static magnetic-field distribution inside the measured object and automated data processing. Magnetic-field deviations in the range (-2.4; 2.6) ppm were found in the human brain at B0 = 1.5 T. For routinely used imaging parameters, with a read gradient strength of about approximately 1 mT/m, the magnetic-field perturbations in the human brain can cause geometrical distortions up to +/-4 mm and intensity changes up to +/-50%. MR images corrected by the described method are suitable for planning high precision applications in neurosurgery. |
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Authors:
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J Weis; A Ericsson; H C Silander; A Hemmingsson |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Magnetic resonance imaging Volume: 16 ISSN: 0730-725X ISO Abbreviation: Magn Reson Imaging Publication Date: 1998 Dec |
Date Detail:
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Created Date: 1999-02-17 Completed Date: 1999-02-17 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8214883 Medline TA: Magn Reson Imaging Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1265-72 Citation Subset: IM |
Affiliation:
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Department of Diagnostic Radiology, University Hospital, Uppsala, Sweden. jan.weis@radiol.uu.se |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Artifacts Brain / anatomy & histology, metabolism, surgery Humans Magnetic Resonance Imaging / methods*, standards, statistics & numerical data Magnetic Resonance Spectroscopy / methods* Neurosurgical Procedures / methods*, statistics & numerical data Phantoms, Imaging |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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