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US 11,953,573 B2Granted
Systems and methods for image reconstruction in magnetic resonance imaging
AssigneePromaxo, Inc.
InventorsRam Narayanan, Aleksandar Nacev, Pulkit Malik, Muller Francis De Matos Gomes
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Abstract
Some embodiments of the present disclosure disclose systems and methods for robust magnetic resonance image reconstruction that can model for all or nearly all components in the magnetic resonance imaging system, that possess compressibility features to speed up reconstructions, and that can be optimized such that the reconstruction can be performed within a short period of time.
Claims44
A method of magnetic resonance imaging (MM), comprising:
- applying, using a transmit coil and a radio frequency (RF) source, a total magnetic field including magnetic field gradients and one or more RF pulse sequences, respectively, to measure one or more states of a sample;
- receiving, from one or more receive coils, MRI measurement data acquired by the receive coils during an acquisition window, the MM measurement data including magnetic resonance signal data emitted by the sample;
- linearly combining, via a processor, a subset of the MRI measurement data to generate a first encoding matrix, the first encoding matrix being a sub-matrix of a second encoding matrix configured to (i) be generated by linearly combining all the MRI measurement data, and (ii) represent the one or more states of the sample, the transmit coil and the receive coils, wherein the subset of the MRI measurement data linearly combined to generate the first encoding matrix includes the MRI measurement data for a single magnetic field gradient of the magnetic field gradients and a single state of the one or more states of the sample;
- and
- determining, by the processor, a characteristic of the MM measurement data based on a computation of the first encoding matrix, wherein the determined characteristic of the MRI measurement includes a shape of a readout gradient of the magnetic field gradients.
2 more elements
A magnetic resonance imaging (MRI) system, comprising:
- a transmit coil and a radio frequency (RF) source configured to apply a total magnetic field including magnetic field gradients and one or more RF pulse sequences, respectively, to measure one or more states of a sample;
- one or more receive coils configured to acquire MRI measurement data including magnetic resonance signal data emitted by the sample during an acquisition window;
- and
- a processor configured to:
- receive, from the one or more receive coils, the MRI measurement data;
- linearly combine a subset of the MRI measurement data to generate a first encoding matrix, the first encoding matrix being a sub-matrix of a second encoding matrix configured to (i) be generated by linearly combining all the MM measurement data, and (ii) represent the one or more states of the sample, the transmit coil and the receive coils, wherein the subset of the MM measurement data linearly combined to generate the first encoding matrix includes the MM measurement data for a single magnetic field gradient of the magnetic field gradients and a single state of the one or more states of the sample;
- determine a characteristic of the MM measurement data based on a computation of the first encoding matrix, wherein the determined characteristic of the MRI measurement includes a shape of a readout gradient of the magnetic field gradients.
4 more elements
A method of magnetic resonance imaging (MRI), comprising:
- applying, using a transmit coil and a radio frequency (RF) source, a total magnetic field including magnetic field gradients and one or more RF pulse sequences, respectively, to measure one or more states of a sample;
- receiving, from one or more receive coils, MRI measurement data acquired by the receive coils during an acquisition window, the MM measurement data including magnetic resonance signal data emitted by the sample;
- linearly combining, via a processor, a subset of the MRI measurement data to generate a first encoding matrix, the first encoding matrix being a sub-matrix of a second encoding matrix configured to (i) be generated by linearly combining all the MRI measurement data, and (ii) represent the one or more states of the sample, the transmit coil and the receive coils, wherein the subset of the MRI measurement data linearly combined to generate the first encoding matrix includes the MRI measurement data related to amplitude and phase of the sample for a single receive coil of the receive coils or the transmit coil;
- and
- determining, by the processor, a characteristic of the MM measurement data based on a computation of the first encoding matrix, wherein the determined characteristic of the MRI measurement includes an amplitude and phase sensitivity of the single receive coil of the receive coils or the transmit coil, respectively.
2 more elements
A method of magnetic resonance imaging (MRI), comprising:
- applying, using a transmit coil and a radio frequency (RF) source, a total magnetic field including magnetic field gradients and one or more RF pulse sequences, respectively, to measure one or more states of a sample;
- receiving, from one or more receive coils, MRI measurement data acquired by the receive coils during an acquisition window, the MM measurement data including magnetic resonance signal data emitted by the sample;
- linearly combining, via a processor, a subset of the MRI measurement data to generate a first encoding matrix, the first encoding matrix being a sub-matrix of a second encoding matrix configured to (i) be generated by linearly combining all the MRI measurement data, and (ii) represent the one or more states of the sample, the transmit coil and the receive coils and;
- and
- determining, by the processor, a characteristic of the MM measurement data based on a computation of the first encoding matrix, wherein the characteristic of the MM measurement data is determined without generating the second encoding matrix.
2 more elements
A magnetic resonance imaging (MM) system, comprising:
- a transmit coil and a radio frequency (RF) source configured to apply a total magnetic field including magnetic field gradients and one or more RF pulse sequences, respectively, to measure one or more states of a sample;
- one or more receive coils configured to acquire MRI measurement data including magnetic resonance signal data emitted by the sample during an acquisition window;
- and
- a processor configured to:
- receive, from the one or more receive coils, the MM measurement data;
- linearly combine a subset of the MRI measurement data to generate a first encoding matrix, the first encoding matrix being a sub-matrix of a second encoding matrix configured to (i) be generated by linearly combining all the MM measurement data, and (ii) represent the one or more states of the sample, the transmit coil and the receive coils, wherein the subset of the MM measurement data linearly combined to generate the first encoding matrix includes the MRI measurement data related to amplitude and phase of the sample for a single receive coil of the receive coils or the transmit coil;
- determine a characteristic of the MM measurement data based on a computation of the first encoding matrix, wherein the determined characteristic of the MRI measurement includes an amplitude and phase sensitivity of the single receive coil of the receive coils or the transmit coil, respectively.
4 more elements
A magnetic resonance imaging (MM) system, comprising:
- a transmit coil and a radio frequency (RF) source configured to apply a total magnetic field including magnetic field gradients and one or more RF pulse sequences, respectively, to measure one or more states of a sample;
- one or more receive coils configured to acquire MRI measurement data including magnetic resonance signal data emitted by the sample during an acquisition window;
- and
- a processor configured to:
- receive, from the one or more receive coils, the MM measurement data;
- linearly combine a subset of the MRI measurement data to generate a first encoding matrix, the first encoding matrix being a sub-matrix of a second encoding matrix configured to (i) be generated by linearly combining all the MM measurement data, and (ii) represent the one or more states of the sample, the transmit coil and the receive coils and;
- determine a characteristic of the MM measurement data based on a computation of the first encoding matrix, wherein the characteristic of the MM measurement data is determined without generating the second encoding matrix.
4 more elements
Dependencies are inferred from the claim text.