Patent classifications
G01R33/58
Imaging method and device for nonlinear parallel magnetic resonance image reconstruction, and medium
There are provided a parallel rapid imaging method and device based on a complex number conjugate symmetry of multi-channel coil data and nonlinear GRAPPA image reconstruction, and a medium. The imaging method includes: obtaining virtual conjugate coil data by expanding the actual multi-channel coil data; combining actual multi-channel coil data and virtual multi-channel coil data to obtain a linear data term and a nonlinear data term; calibrating weighting factors of the linear data term and the nonlinear data term by using combined low-frequency full-sampling data (margins of the low-frequency full-sampling data includes parts of high-frequency data); reconstructing data which is under-sampled in a high-frequency region according to the calibrated weighting factors; fusing the low-frequency full-sampling data and the reconstructed data for the high-frequency region.
Imaging method and device for nonlinear parallel magnetic resonance image reconstruction, and medium
There are provided a parallel rapid imaging method and device based on a complex number conjugate symmetry of multi-channel coil data and nonlinear GRAPPA image reconstruction, and a medium. The imaging method includes: obtaining virtual conjugate coil data by expanding the actual multi-channel coil data; combining actual multi-channel coil data and virtual multi-channel coil data to obtain a linear data term and a nonlinear data term; calibrating weighting factors of the linear data term and the nonlinear data term by using combined low-frequency full-sampling data (margins of the low-frequency full-sampling data includes parts of high-frequency data); reconstructing data which is under-sampled in a high-frequency region according to the calibrated weighting factors; fusing the low-frequency full-sampling data and the reconstructed data for the high-frequency region.
Method for providing a proposal for setting scan parameters and a computing unit for providing a setting aid
A proposal is provided for setting scan parameters comprising at least one value range scan parameter and at least two state scan parameters of a scan sequence of a magnetic resonance protocol for a magnetic resonance examination. A user is supported in the selection of the state scan parameters to be set by a computing unit that checks whether the selection of state scan parameters to be set made by the user comprises a permissible combination of settings and/or states. If an impermissible combination of settings and/or states is present, the computing unit ascertains at least one proposal with a permissible combination of settings and/or states for the state scan parameters to be set.
Method for providing a proposal for setting scan parameters and a computing unit for providing a setting aid
A proposal is provided for setting scan parameters comprising at least one value range scan parameter and at least two state scan parameters of a scan sequence of a magnetic resonance protocol for a magnetic resonance examination. A user is supported in the selection of the state scan parameters to be set by a computing unit that checks whether the selection of state scan parameters to be set made by the user comprises a permissible combination of settings and/or states. If an impermissible combination of settings and/or states is present, the computing unit ascertains at least one proposal with a permissible combination of settings and/or states for the state scan parameters to be set.
Determining calibration data for a reconstruction of image data from scan data acquired by means of a magnetic resonance system
Calibration data is determined for a reconstruction of image data from scan data acquired via a magnetic resonance system. This includes specifying acquisition shots for an acquisition of desired scan data in which acquisition shots scan data is acquired after radiating-in an RF excitation pulse, identifying first acquisition shots among the acquisition shots specified in which scan data is acquired in a central region in k-space, stipulating a sequence in which the specified acquisition shots are to be carried out such that first acquisition shots are arranged in the sequence in a starting portion to be carried out first, acquiring the scan data by carrying out the specified acquisition shots in the stipulated sequence, determining calibration data from scan data acquired in the starting portion of the sequence, and reconstructing image data using the acquired scan data and the specified calibration data.
Determining calibration data for a reconstruction of image data from scan data acquired by means of a magnetic resonance system
Calibration data is determined for a reconstruction of image data from scan data acquired via a magnetic resonance system. This includes specifying acquisition shots for an acquisition of desired scan data in which acquisition shots scan data is acquired after radiating-in an RF excitation pulse, identifying first acquisition shots among the acquisition shots specified in which scan data is acquired in a central region in k-space, stipulating a sequence in which the specified acquisition shots are to be carried out such that first acquisition shots are arranged in the sequence in a starting portion to be carried out first, acquiring the scan data by carrying out the specified acquisition shots in the stipulated sequence, determining calibration data from scan data acquired in the starting portion of the sequence, and reconstructing image data using the acquired scan data and the specified calibration data.
Flux line filter
Techniques for creating a low pass filter associated with a flux line are presented. A qubit device can comprise a first substrate and second substrate. A low pass filter, comprising at least one inductor and at least one capacitor can be formed, wherein respective components of or associated with the low pass filter can be formed on the first or second substrates, and wherein one or more bump bonds can extend between the substrates to connect respective components that are on respective substrates. The filter can receive an input signal via an input line and filter the signal to produce a filtered signal as output to a flux line that is in proximity to a coupler with SQUID loop and one or more flux-tunable qubits that are formed on one of the substrates. The filter can reduce electrical noise and Purcell decay associated with the flux line.
Medical image processing apparatus and method
A medical image processing apparatus including processing circuitry configured to obtain MR dynamic images acquired by MR imaging on a subject, in which a contrast agent has been injected, in accordance with an examination-time imaging condition including magnetic field information, contrast agent information, and/or tissue information, set a standard imaging condition, and calculate a first index value indicating a temporal change of an MR signal value caused by the contrast agent, the index value being standardized by conversion from the examination-time imaging condition to the standard imaging condition based on the MR dynamic images, the examination-time imaging condition, and the standard imaging condition.
Medical image processing apparatus and method
A medical image processing apparatus including processing circuitry configured to obtain MR dynamic images acquired by MR imaging on a subject, in which a contrast agent has been injected, in accordance with an examination-time imaging condition including magnetic field information, contrast agent information, and/or tissue information, set a standard imaging condition, and calculate a first index value indicating a temporal change of an MR signal value caused by the contrast agent, the index value being standardized by conversion from the examination-time imaging condition to the standard imaging condition based on the MR dynamic images, the examination-time imaging condition, and the standard imaging condition.
Novel Compositions that Mimic Adipose Tissue in MRI
Provided herein are adipose mimic compositions for use in MRI. The compositions of the invention mimic the MRI properties of human adipose tissue, including T1 relaxation kinetics, T2 relaxation kinetics, magnetic susceptibility, and chemical shift artifact. The compositions of the invention are readily manufactured from inexpensive materials. The compositions of the invention may be used in MRI system calibration or for implementing image correction techniques such as fat suppression.