| Self-encoded marker for optical prospective head motion correction in MRI. | |
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MedLine Citation:
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PMID: 20879239 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The tracking and compensation of patient motion during a magnetic resonance imaging (MRI) acqusition is an unsolved problem. For brain MRI, a promising approach recently suggested is to track the patient using an in-bore camera and a checkerboard marker attached to the patient's forehead. However, the possible tracking range of the head pose is limited by the locally attached marker that must be entirely visible inside the camera's narrow field of view (FOV). To overcome this shortcoming, we developed a novel self-encoded marker where each feature on the pattern is augmented with a 2-D barcode. Hence, the marker can be tracked even if it is not completely visible in the camera image. Furthermore, it offers considerable advantages over the checkerboard marker in terms of processing speed, since it makes the correspondence search of feature points and marker-model coordinates, which are required for the pose estimation, redundant. The motion correction with the novel self-encoded marker recovered a rotation of 18 degrees around the principal axis of the cylindrical phantom in-between two scans. After rigid registration of the resulting volumes, we measured a maximal error of 0.39 mm and 0.15 degrees in translation and rotation, respectively. In in-vivo experiments, the motion compensated images in scans with large motion during data acquisition indicate a correlation of 0.982 compared to a corresponding motion-free reference. |
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Authors:
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Christoph Forman; Murat Aksoy; Joachim Hornegger; Roland Bammer |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention Volume: 13 ISSN: - ISO Abbreviation: Med Image Comput Comput Assist Interv Publication Date: 2010 |
Date Detail:
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Created Date: 2010-09-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101249582 Medline TA: Med Image Comput Comput Assist Interv Country: Germany |
Other Details:
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Languages: eng Pagination: 259-66 Citation Subset: IM |
Affiliation:
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Department of Radiology, Stanford University, Stanford, California, USA. |
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Descriptor/Qualifier:
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| Grant Support | |
ID/Acronym/Agency:
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1R01EB006526/EB/NIBIB NIH HHS; 1R01EB008706/EB/NIBIB NIH HHS; 1R21EB006860/EB/NIBIB NIH HHS; 5R01EB002711/EB/NIBIB NIH HHS; P41RR09784/RR/NCRR NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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