Measurements Using NMR Imaging Systems TRIZ Cases
- MRI Field of View Extension via Nonlinear Gradient Correction
Iterative reconstruction incorporates measured gradient nonlinearity into the forward model, extending the field of view without increasing acquisition time.
- Medical Imaging Control Signals for Dynamic Scan Adaptation
Dynamic adjustment of control signals based on current ambient conditions and effective volumes maintains image quality despite position changes.
- fMRI Control Using Extended Echo Time for Low Field Contrast
A magnetic resonance imaging control method applies a measurement sequence with an extended echo time to enhance T2* contrast at lower magnetic field strengths.
- Tunable MRI System for Multi-Field Relaxometry
A tunable MRI system acquires relaxation data at multiple magnetic field strengths using a single hardware platform.
- Dynamic RF Coil Tuning for MRI Patient Loading
Feedback circuits dynamically tune RF coils to patient anatomy, resolving signal-to-noise ratio drops from variable loading.
- Low-Field MRI Patient Grounding via Electromagnetic Shielding
Grounding the patient through electromagnetic shielding reduces noise interference, enabling low-field MRI operation in unshielded environments.
- MRI Image Rotation for Unified Observation Direction
Rotating slice images to a common reference frame resolves the conflict between multi-angle imaging versatility and visual recognition of regions of interest.
- MR Coil Position Detection Using Trained Comparison Models
A trained comparison model correlates one-dimensional magnetic resonance data with reference patterns to determine reception coil position.
- R2CR* Map for Accurate Iron Depiction in MRI
A composite R2CR* map integrates transverse relaxation rates to evaluate iron deposition in tissue.
- MRI Movement Signal Orientation Assignment via Multi-Method Capture
Assigns spatial orientation to MRI movement signals by comparing data from multiple capture methods.
- Synthetic Gradient Noise Generation for MRI Communication Interference
A synthetic gradient noise generation module produces acoustic signals from sensor data to enable remote operator communication.
- MRI Diffusion-Weighted Image Computation for Tumor Contrast
Computes diffusion-weighted images with arbitrary b-values from multiple acquired scans to enhance tissue contrast.
- MRI Gradient Control Sequence Amplitude and Direction Rate Limiting
Optimized MRI gradient control sequence limits amplitude and direction change rates to reduce mechanical oscillations.
- Magnetic Resonance Pulse Optimization with Dynamic Gradient Grid Density
A magnetic resonance control unit adjusts gradient grid density to manage pulse sequence optimization time.
- Movement Correction in Magnetic Resonance Fingerprinting
Magnetic resonance fingerprinting corrects signal shapes using simultaneous movement data, preventing motion artifacts from distorting tissue parameter maps.
- Multiband RF Pulse Phase Modulation for MRI Slice Registration
Multiband radiofrequency pulses modulate slice phases to resolve aliasing artifacts and reduce scan time.
- Norm Ball Projection for Noise-Adaptive Deep Learning Image Reconstruction
Norm ball projection adapts data consistency to noise levels, preventing hallucinations and improving signal-to-noise ratio in reconstructed images.
- MRI Gradient Pulse Correction for Radial Acquisition Trajectory Errors
Prescan correction data adjusts gradient pulse timing and strength, eliminating distortion from non-ideal pulses in radial MRI.
- Simultaneous Multislice MRI Acquisition with Dynamic Slice Grouping
Dynamic slice grouping optimizes coil sensitivity distribution to separate overlapping signals, resolving insufficient variation in thin layer stacks.
- MRI Susceptibility Map Generation via Edge-Aware L1 Regularization
Edge-aware L1 norm regularization preserves tissue boundary sharpness while stabilizing calculations in low-signal regions to eliminate shading artifacts.
- Rotatable Halbach Dipole Rings for Variable MPI Selection Fields
Rotating two coaxial Halbach dipole ring pairs adjusts the gradient magnitude and field-free line position, reducing drive field amplitude and tissue heating.
- MRI K-space Equal Interval Sampling for Time-Series Image Quality
Equal interval k-space sampling suppresses aliasing artifacts in under-sampled data acquisition to enhance time-series image resolution.
- MRI K-space Sampling Density Control for Parameter Mapping
An MRI apparatus controls k-space sampling densities based on imaging parameters to generate parameter mapping images.
- RF Pulse Interpolation Circuitry for MRI Slew Rate Control
Interpolating circuitry reduces digital data variation to lower slew rates, preventing RF amplifier overload during high baseband frequency pulse generation.
- MRI Motion Correction via Sub-Region Segmentation
Subdividing the region of interest into slabs allows independent motion correction, reducing artifacts without complex navigator scans.
- Parallel Imaging Weighting Matrix via Spin-Echo Reference Data
Spin-echo reference data determines weighting matrix to resolve calibration inconsistencies from segmented recording in parallel imaging.
- MRI Apparatus Dynamic Pulse Sequence Adjustment
A magnetic resonance imaging apparatus dynamically adjusts pulse sequences during signal acquisition to ensure sufficient data for reconstruction.
- NMR Fingerprinting for Simultaneous T1 and T2 Parameter Acquisition
Unified pulse sequences acquire T1 and T2 signals in one continuous sweep, eliminating repetitive preparations that waste data collection time.
- Automated Acquisition Volume Definition for MRI Signal Suppression
Automated segmentation defines the magnetic resonance acquisition volume using a calculated envelope to optimize saturation band placement.