Measurements Using NMR Imaging Systems TRIZ Cases

A correction device intercepts MRI control commands to replace spectrally selective pulses with substitute pulses.

Distributed capacitance wire conductors in a flexible RF coil array reduce magnetic coupling and improve signal-to-noise ratios.

Applying a susceptibility weighted mask to MRI images removes phase wrapping artifacts, improving tissue differentiation and image clarity.

Acquiring reference data via alternating readout gradients before measurement.

Adapting sensitivity maps via B0 field mapping eliminates sub-sampling artefacts in parallel MRI.

A magnetic resonance signal acquisition apparatus sets non-overlapping first and second acquisition areas through triaxial localization.

Texture analysis of magnetic resonance fingerprinting maps differentiates prostate cancer from prostatitis, reducing subjective interpretation errors.

Eliminating selection gradient polarity reversal in MR pulse sequences reduces acoustic noise while maintaining gradient moment compensation.

Segmenting calibration ranges by subject regions improves measurement precision without extending examination time.

An MR local coil unit determines its position and orientation using integrated acceleration sensors to detect gravitational vectors.

Precalculating base sequences at reference points allows a neural network to interpolate drive sequences, resolving delays in ultra-high field MRI examinations.

Intermittently blipped phase gradient pulses shift k-space positions during signal sensing to acquire multiple voxel locations from a single NMR signal.

A DCE MRI system estimates calibration errors using variable flip angle images to ensure measurement accuracy.

High angular resolution diffusion imaging with multi-compartment modeling corrects for edema to enable robust fiber tracking in neurosurgery.

A control device manages RF transmission signals using pre-calculated specific absorption rate models to ensure patient safety during magnetic resonance imaging.

Nonlinear gradient fields modify RF pulse and slice profile relationships, reducing specific absorption rate while maintaining slice quality.

A framework identifies signal components by comparing fit maps of measured and swapped values.

Pulsed radio frequency saturation isolates bound pool spins to overcome rapid transverse relaxation and enhance tissue differentiation.

A 4D MRI system extracts temporal basis functions from spatially encoded data to generate high-resolution coefficient images.

A demo-sequence precedes medical imaging pulses to condition patients against gradient coil acoustic noise.

Processing circuitry calculates a center frequency for frequency-selective pulses based on tissue resonance distributions.

Segment 3D MR data acquisition using distinct transmit and receive frequency offsets to apply de-blurring corrections that reduce metal-induced image artifacts.

Direct HSS solver reduces computational burden by achieving six-fold speedup over iterative methods.

Frequency-swept pulses generate fictitious magnetic fields to enable relaxation in rotating frames of rank n>2.

Pre-computed lookup tables store scanner-specific transformations, reducing processing time and computational costs for large datasets.

Real-time shimming maintains magnetic field homogeneity during magnet movement, eliminating manual re-shimming.

A magnetic resonance system corrects phase errors in multidimensional spatially selective radiofrequency excitation pulses using calibration gradient echoes.

Rotated slab excitation suppresses out-of-field signals using minimum-phase RF pulses for high-resolution imaging.

Simultaneous orthogonal plane imaging generates low-latency volumetric motion estimates to reduce intra-fraction artifacts and enhance dose delivery accuracy.

Automatic optimization of magnetic resonance imaging parameters reduces acoustic noise volume while maintaining image quality.

Continuous spin labeling within each repetition interval maintains label visibility, resolving non-constant appearance in cerebrospinal fluid imaging.

Determines specific absorption ratio by accounting for unloaded and loaded RF coil power losses, improving safety monitoring accuracy.

Segmenting MRI volumes into user-defined compartments reduces phase-encoding steps, accelerating spatially localized NMR measurements.

Segmented inversion recovery pulses suppress magnetization transfer effects and stabilize baseline curves for accurate cerebral blood flow analysis.

Automated inversion time adjustment using single-line acquisition and compartment detection for MRI systems.

Separating T2 preparation from multi-echo acquisition using 3D non-slice selective block RF pulses mitigates slice profile and stimulated echo errors.

An MRI apparatus interpolates missing k-space lines using data from multiple undersampled acquisitions to reconstruct images.

Reducing the static magnetic field strength to 10-100 mT eliminates geometric distortions and heating caused by metal implants.

Pre-calculated compensation gradients applied after RF refocusing pulses reduce eddy current artifacts and improve image quality.

Oversampling the center of k-space while undersampling periphery maintains signal-to-noise ratio and image quality during rapid data acquisition.

Central echo flow compensation in interleaved epi reduces scan time while eliminating motion artifacts.

A compact magnetic resonance system uses a permanent magnet to generate gradient fields for diffusion weighted imaging.

A linear accelerator aligns its electron beam parallel to the MRI magnetic field lines within the imaging bore.

Echo splitting generates multiple signal pathways from a single RF pulse, reducing acquisition time and specific absorption rate.

Multi-echo MRI sequences sample k-space regions using distinct orders for different magnetization configurations to optimize signal acquisition.

Direct sampling of analog signals via a digital signal processor eliminates intermediate frequency conversion, reducing filter complexity and power consumption.

Spatially encoded phase-contrast MRI reduces acquisition time by over a factor of 100, enabling continuous 3D imaging with high temporal resolution.

Compressed sensing super-resolution reconstruction synthesizes high-resolution diffusion images from multiple low-resolution acquisitions.

Gradient reversals replace conventional switching to eliminate acoustic noise and image degradation while maintaining high spatial encoding accuracy.

NMR fingerprinting applies variable RF pulse sequences to generate unique signal evolutions for tissue characterization.