Invention Grant
US07642777B1 Fast automatic linear off-resonance correction method for spiral imaging
有权
用于螺旋成像的快速自动线性非共振校正方法
- Patent Title: Fast automatic linear off-resonance correction method for spiral imaging
- Patent Title (中): 用于螺旋成像的快速自动线性非共振校正方法
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Application No.: US11892261Application Date: 2007-08-21
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Publication No.: US07642777B1Publication Date: 2010-01-05
- Inventor: Craig H. Meyer , Weitian Chen
- Applicant: Craig H. Meyer , Weitian Chen
- Applicant Address: US VA Charlottesville
- Assignee: University of Virginia Patent Foundation
- Current Assignee: University of Virginia Patent Foundation
- Current Assignee Address: US VA Charlottesville
- Agency: Blank Rome LLP
- Main IPC: G01V3/00
- IPC: G01V3/00
Abstract:
A fast automatic linear off-resonance correction method for MRI data uses a set of widely spaced demodulation frequencies to estimate a low-resolution field map from the image itself. A linear map is determined by fitting to this low-resolution map using a maximum-likelihood estimator with weights proportional to the pixel intensity.
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