Determination of higher order terms of three-dimensional gradient impulse response functions.
JP7616441B2Active Publication Date: 2025-01-17KONINKLIJKE PHILIPS NV
Patent Information
- Application Number
- JP2024003653
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2018-06-12
- Filing Date
- 2024-01-15
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2039-05-20
Smart Images
Figure 0007616441000001 
Figure 0007616441000002 
Figure 0007616441000003
Abstract
To provide a medical instrument having a magnetic resonance imaging system that has an imaging zone.SOLUTION: Execution of machine-executable instructions causes a processor controlling a medical instrument to repeatedly control a magnetic resonance imaging system with a calibration pulse sequence command to acquire a plurality of slices of magnetic resonance calibration data by using at least one of three orthogonal gradient coils to generate a slice selection gradient magnetic field, to compute Fourier transformation of magnetic resonance calibration data with respect to voxels of the multiple slices in a phase coding direction, to calculate an expansion of the Fourier transformed magnetic resonance calibration data into spherical harmonics, and to calculate a three-dimensional gradient impulse response function with respect to at least one of the three orthogonal gradient coils by using the expansion into the spherical harmonics.SELECTED DRAWING: Figure 1
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Citation Information
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