Measurements Using NMR TRIZ Cases

Adjustable shim magnets with inner and outer shields improve MRI field uniformity while reducing flux leakage, interference, and shimming cost.

Arc-shaped conductor segments replace complex birdcage coil links to maintain MRI RF field generation while easing assembly and maintenance.

Non-uniform B0 field cycling and tailored RF and DC gradients enable compact MRI imaging without large uniform-field magnets.

A Halbach magnetic tunnel and µ-metal shield support 100 µT–29.3 T cycling while reducing shuttling-related polarization loss.

Grouping equivalent isochromats across subvoxels lets Bloch-equation MR simulations preserve accuracy while reducing computation time.

Active feedback and decoupling reduce RF-chain noise and coil quality factor in low-field MRI for unshielded clinical settings.

Quantum sensors improve MRI signal sensitivity while optical links reduce reception noise.

This MRI power system combines mains electricity with stored energy to level peak demand and avoid dedicated three-phase connections.

A forward sensing probe measures resonance detuning to pre-tune the main probe, eliminating slow autotuning delays during moving target inspection.

Dynamic tuning of a passive transmitting antenna resolves the trade-off between signal-to-noise ratio and excitation homogeneity in magnetic resonance imaging.

Local magnetic modulation enables spatial encoding without strong gradient switching, accelerating data acquisition.

Calculated gradient moments counteract field inhomogeneities from tissue boundaries, reducing signal loss without empirical trial-and-error.

An integrated magnet device combines field-shift shield coils and gradient coils on a shared substrate to optimize magnetic field parameters.

A shielding coil counteracts transient fields generated by a prepolarizing coil to minimize eddy currents.

Overlapping slab segmentation and reduced slice-selection gradients suppress ripple-artefacts near metal implants while maintaining scan speed.

Computing final B0 maps from original field distributions using trained functions to determine shim currents.

Inductive coupling via a pickup loop measures actual RF current to correct SAR calculations, resolving inaccuracies from non-uniform B1 field distributions.

An energy control facility monitors and manages power consumption across key magnetic resonance components to maintain operational stability.

Non-adiabatic field switching enables in-situ magnetic field measurement during nuclear spin relaxometry, resolving systematic errors at ultra-low fields.

An integrated magnet device positions primary field-shift coils closer to the imaging volume than shield coils.

SABRE-SHEATH transfers spin order from parahydrogen to heteronuclei via scalar couplings, achieving 30,000-fold signal enhancement without complex equipment.

Ultra-low-field MRI systems employ optimized DW-SSFP pulse sequences to overcome signal-to-noise ratio limitations inherent in compact permanent magnet designs.

A phase shift circuit creates a 180-degree phase difference between coil units to offset reactance coupling in magnetic resonance systems.

Rotating the B0 field relative to the object minimizes magic angle artifacts in collagen tissues while maintaining homogeneous magnetic fields.

Gas pressure unlocks the carrier to discharge tubes, preventing contamination and damage from gravity-driven insertion.

A hyperpolarization system transports substances using a magnet to maintain the polarized state during movement.

A handheld nuclear magnetic resonance apparatus detects minute quantities of taggant substances using zero external field signatures.

Reference tones enable continuous probe position tracking within the imaging volume without extending scan duration or disturbing spin manipulation.

Rotatable permanent magnets reduce power consumption and facility costs for portable low-field MRI systems.

Movable permanent magnet arrays replace resistive coils to eliminate heat and power consumption in ultra-low field MRI systems.

Nonlinear gradient waveform correction compensates for non-linear eddy currents, improving MR image quality and signal-to-noise ratio in low-field MRI systems.

Magnetic resonance tomograph modulates homogeneous field strength to shift Larmor frequency, reducing shielding complexity and electromagnetic interference.

Concentrically stacked RF coil array eliminates mutual inductance across orthogonal planes, reducing surface dose during gantry rotation.