Parallel magnetic resonance imaging
AssigneeKoninklijke Philips Electronics N.V.
InventorsMichel Paul Jurriaan Jurrissen, Miha Fuderer
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Abstract
The invention relates to a device (1) for magnetic resonance imaging of a body (7) placed in a stationary and substantially homogeneous main magnetic field. In order to provide an MR device (1) which is arranged to automatically select an optimum subsampling scheme for three-dimensional SENSE, the invention proposes to select the subsampling scheme such that the maximum number of folded-over image values is minimized and simultaneously distances between the positions of the folded-over image values within the predetermined field of view are maximized.
Claims13
A device for magnetic resonance imaging of a body placed in a stationary and substantially homogeneous main magnetic field, with receiving antennas for receiving phase encoded magnetic resonance signals from the body, which receiving antennas have sensitivity profiles, wherein the device is configured to:
- select a scheme of subsampling such that the maximum number of folded-over image values is minimized and simultaneously the distances between the positions of the folded-over image values are maximized,
- acquire the magnetic resonance signals with subsampling in two phase encoding directions in accordance with the selected scheme of subsampling and in correspondence with a predetermined field of view,
- reconstruct a three-dimensional image containing folded-over image values, and
- calculate image values at spatial positions within said field of view from the folded-over image values and the sensitivity profiles of the receiving antennas.
A method for magnetic resonance imaging of at least a portion of a body placed in a stationary and substantially homogeneous main magnetic field, the method comprising:
- selecting a scheme of subsampling that corresponds to a triangular grid and is selected such that the maximum number of folded-over image values is minimized and simultaneously the distances between the positions of the folded-over image values are maximized;
- acquiring magnetic resonance signals with subsampling in two phase encoding directions in accordance with the selected scheme of subsampling and in correspondence with a predetermined field of view;
- reconstructing a three-dimensional image containing folded-over image values;
- and
- calculating image values at spatial positions within said field of view from the folded-over image values and sensitivity profiles of receiving antennas.
A data carrier storing a computer program for a magnetic resonance imaging device, the computer program comprising instructions for:
- selecting a scheme of subsampling corresponding to a triangular grid and is selected such that the maximum number of folded-over image values is minimized and simultaneously the distances between the positions of the folded-over image values are maximized,
- acquiring magnetic resonance signals with subsampling in two phase encoding directions in accordance with the selected scheme of subsampling and in correspondence with a user predetermined field of view,
- reconstructing a three-dimensional image containing folded-over image values, and
- calculating image values at spatial positions within said field of view from the folded-over image values and sensitivity profiles of receiving antennas.
Dependencies are inferred from the claim text.