Measurements Using NMR Imaging Systems TRIZ Cases

Segmenting k-space data into time-series sets allows the system to exclude movement-corrupted frames, reducing artifacts without extending scan duration.

An interference suppression antenna emits counter-phase signals to reduce radio frequency field strength in magnetic resonance tomography environments.

An asymmetric adiabatic inversion pulse combines gradient-modulated offset-independent waveforms to control radio frequency excitation.

Two orthogonal radio-frequency pulses excite sub-volumes in a two-dimensional matrix, reducing spin system saturation during large target volume coverage.

A dipole array coil generates external field modes to produce target internal fields within the subject.

A control device calculates electric current and voltage for MRI gradient coils using mutual inductance to verify imaging sequence feasibility.

Magnetic resonance fingerprinting acquires transient-state signals via a diffusion-weighted double-echo pulse sequence.

Reducing rephasing gradient amplitude and adjusting duration mitigates eddy current artifacts in low-field MRI water/fat separation.

Dynamic echo spacing adjustment enables variable-density undersampling in EPI, reducing scan time while maintaining image quality.

A 3D radial MRI acquisition scheme uses soft motion gating to assign weighted factors to k-space signals based on detected patient movement.

A system control unit determines MR excitation control data using estimated magnetic field map data for alternative object locations.

Modulating the polar angle of the k-space trajectory disperses the bright polar point spread function region to eliminate streak artifacts in axial head images.

Subtract transmit signal from received RF data before preamplification to protect amplifiers and reduce cabling complexity.

Segmented measurement passes maintain image contrast while reducing noise levels through increased distance between simultaneously excited volume elements.

Combined time-domain NMR method quantifies bitumen and water content using optimized pulse sequences, replacing slow Dean-Stark extraction.

Spin-lock pulses isolate longitudinal magnetization to resolve the trade-off between spatial and temporal resolution in neuroimaging.

Independent component analysis segments mixed magnetic resonance fingerprinting data to resolve insufficient spatial contrast in conventional pulse sequences.

Selective SEMAC reconstruction corrects magnetic resonance image distortions using a distortion criterion to assign partition slice data only where needed.

Separate antennas tuned to specific Larmor frequencies prevent back-folding artifacts during parallel MRI reconstruction of multiple nuclei species.

Dynamic capacitance monitoring adjusts gradient coil power conditions to maintain image quality while reducing manufacturing costs and equipment volume.

Detecting magnetic field vectors via spherical harmonic modeling corrects geometric distortions from non-linear gradient fields.

Concentric voxel segmentation calculates complex summations to determine magnetic moments, reducing quantification uncertainty below five percent.

Spiral-ring echo readouts acquire diffusion data with magnitude stabilizer gradients, reducing scan time and artifacts in low-field systems.

Alternating readout gradient polarities during acquisition separates spin species while minimizing chemical shift artifacts and reducing measurement time.

Channel-by-channel measurement data manipulation corrects phase errors in turbo spin echo sequences.

Low-resolution calibration data optimizes B0 homogeneity and fat suppression, resolving field inhomogeneity artifacts in high-field MRI.

RF shimming remaps the B1+ map into a lower dimension coordinate system, correcting inhomogeneous fields that complicate clinical diagnosis.

A wideband MRI apparatus generates multi-frequency RF signals to simultaneously excite different nuclei types.

A magnetic resonance system arranges radial k-space spokes using Fibonacci phyllotaxis equations to define polar and azimuthal angles.

Arbitrary gradient waveforms and random repetition times in magnetic resonance fingerprinting pulse sequences control acoustic noise levels.

A visual marker displays T1 and T2 weighting coordinates in a window to adjust MRI scanner settings.

A slice-specific linear correction phase adjusts RF excitation timing to separate simultaneous MR signals from multiple slices.

A processing system derives conventional magnetic resonance images from quantitative voxel parameters using Bloch equation synthesis.

A magnetic resonance imaging system determines scan sequences using k-space gradient pulse response data.

A magnetic resonance imaging method identifies artifact sources by comparing acquired data against coil sensitivity maps to exclude corrupted signals.

Adiabatic BIREF-1 pulses maintain image homogeneity and contrast by resolving B1 inhomogeneities, motion artifacts, and blood flow susceptibility.

An iterative reconstruction kernel corrects relative phase shifts in multiband MRI systems to produce unaliased images.

A B1 field mapping method uses linear projections to acquire spatial encoding signals for efficient reconstruction.

Automated calibration determines individualized parameters from image data, resolving manual operation complexity and improving measurement precision.

Segmented metallic layers with staggered slits reduce eddy currents and heat generation, enhancing MR-PET scanner performance by minimizing RF interference.

Acquires angiographic signal data to derive quantitative blood flow parameters for optimizing arterial spin labeling sequence efficiency.

A magnetic resonance pulse sequence reduces repetition time by selectively deactivating gradients during specific acquisition cycles.

Preliminary motion estimation compensates for cardiac artifacts, enabling precise T1* map generation and optimal inversion time selection.

PROPELLER-DUO acquisition separates spin and stimulated echoes, mitigating non-CPMG artifacts from metallic implants.

Navigation acquisition timeslots collect echo data for phase relationship determination in k-space.

An interleaved magnetic resonance sequence acquires T1, T2, proton density, and B1 field data simultaneously.

Segmenting k-space acquisition with pre-phase-dispersion gradient pulses suppresses Nyquist and acceleration artifacts in echo planar imaging.

SENSE reconstruction separates slice images to generate leakage maps, resolving inter-slice artifacts that degrade image quality.

Segmented conductive rungs with azimuthal windows maintain B1 field uniformity while reducing beam attenuation for radiation therapy.