Measurements Using NMR Imaging Systems TRIZ Cases

Magnetic resonance fingerprinting with simultaneous multivolume acquisition reduces scan time by estimating MR parameters across multiple slices in parallel.

A residual map generated from magnetic resonance data evaluates signal model quality of fit.

An MR apparatus determines an upper limit for echo train length using echo spacing and k-space view counts.

A magnetic field strength sensor detects characteristic Bref to locate local coils along the z-axis in MRI units.

SENSE plus motion model detects patient movement without external tracking devices to reconstruct initial images.

Registers coil sensitivity distributions with gridding sensitivity centers to reduce streak artifacts in non-Cartesian MRI perimeter regions.

Central k-space acquisition determines MRI calibration data before full scan completion.

Dynamic gradient lobe amplitude adjustment during Cartesian continuous sampling improves signal-to-noise ratio without extending acquisition time.

Orthogonal sampling masks introduce incoherence into MR k-space data, reducing blurring and artifacts without increasing scan time.

A monitoring device calculates local specific absorption rate using whole body measurements and pre-established coil parameter ratios.

Dynamic switching circuit adjustment reduces energy consumption and switching losses in MRI gradient power supplies.

Iterative compressed sensing reconstructs multiple MRI slabs as a single volume using wavelet regularization.

Dynamic termination criteria in the monitoring unit stop acquisition when sufficient quality is reached, reducing measurement time without artifacts.

Real-time distance detection between the patient and enclosure allows dynamic RF power adjustment, preventing burns while maintaining transmission efficiency.

Processing circuitry generates composite images from reference and difference k-space data to accelerate MRI reconstruction.

Reducing the refocusing pulse flip angle maintains image contrast while shortening recording time in turbo spin echo sequences.

A magnetic resonance sequence acquires navigator data with lower spatial resolution using time offsets for slice-specific refocusing pulses.

Recursive RF pulse design accounts for residual longitudinal magnetization to eliminate ghosting artifacts in high-resolution segmented echo planar imaging.

A parallel transmit radio frequency coil array excites multiple tissue slices simultaneously using varied pulse sequences.

Segmented cooling pipes target high-heat regions in MRI gradient coils, resolving uneven temperature distribution caused by resistive heating.

A residual convolutional neural network estimates missing k-space lines by combining linear and nonlinear processing layers.

A method corrects k-space trajectories in magnetic resonance imaging systems using frequency-dependent gradient parameters.

A magnetic resonance receiver uses a channel selection unit to route analog signals to specific digital processing channels based on local coil type information.

Parallel image reconstruction suppresses side-band artefacts by separating unwanted harmonic signals from desired slice data via coil sensitivity profiles.

Automated dual-axis image comparison eliminates phase coding artifacts without manual operator intervention, preserving disease indicator visibility.

A magnetic resonance method applies slice-specific correction parameters to gradient pulses during excitation.

Adaptive SEMAC reduces scan time by applying localized quality corrections to metal artifacts in MRI.

Intra-operative MRI assessment of excised tissue margins reduces re-operation rates by providing immediate surgical feedback on tumor removal completeness.

Navigator echoes measure phase offsets between alternating polarity gradients, correcting N/2 ghosting artifacts and magnetic field drifts.

Adjusting MRI g factors via regularization parameters to optimize signal-to-noise ratios in parallel imaging systems.

Multi-echo ultrashort echo time pulse sequence acquires data to calculate optimal echo times for magnetic resonance imaging.

Temperature-controlled permittivity tuning in ultrahigh dielectric constant RF coils enhances signal reception efficiency.

Segmented refocusing pulses invert spins in adjacent slices to prevent longitudinal magnetization saturation, reducing multi-slice acquisition time.

Replacing frequency-encoding gradients with three orthogonal phase-encoding directions eliminates in-plane signal loss and pile-up artifacts near metal objects.

An MRI system interpolates undersampled MR signals using stored parameter data to reconstruct accurate images.

Ultrashort echo time pulse sequences determine local coil sensitivity profiles while avoiding gradient switching noise and signal dephasings.

Incremental information density in MR pulse sequences reduces susceptibility to patient movement artifacts while maintaining diagnostic parameter map quality.

Non-linear ramp-up and ramp-down portions in trapezoidal gradient waveforms prevent voltage overshoot in low-field MRI systems.

Deriving a field map estimate from a pre-scan fat fraction map corrects signal contributions, preventing water fat swaps caused by magnetic field imperfections.

Correcting echo signals via phase and magnitude differences between even and odd k-space lines reduces Nyquist ghost artifacts below 2%.

A trained machine learning module generates shimming information from pre-scan data to correct magnetic field inhomogeneities.

Inserting a decay duration in MR gradient sequences allows eddy currents to dissipate, preventing image artifacts during high-resolution imaging.

Tile-all-frame acquisition reduces the condition number of GRAPPA encoding equations to prevent noise amplification in dynamic MRI reconstruction.

Segmented linear functions optimize magnetic resonance gradient pulses, reducing slew rates and noise exposure while maintaining imaging speed.

Consecutive-segment acquisition with parallel imaging separates collapsed slices into distinct images.

Dynamic sub-bolus length adaptation in time-encoded ASL MRI eliminates arterial transit delay artifacts while maintaining imaging efficiency.

Hermetically sealable cylindrical phantom with X-ray and MRI visible markers attached to a support frame.

Dual RF power CEST MRI acquires signals at distinct saturation levels to derive concentration-independent pH values.

Reconstruct non-Cartesian MRI scans by estimating k-space data via covariance map convolution, reducing computational burden.