Measurements Using NMR Imaging Systems TRIZ Cases

Continuous radio frequency irradiation maintains labile proton saturation during data acquisition, reducing imaging time by a factor of five.

A signal restoration function corrects RF signals in magnetic resonance imaging to enhance image resolution.

A magnetic resonance receive chain synchronizes local and central clocks to establish a precise phase relationship for signal processing.

A gradient impulse response function determines time-dependent magnetic field deviations to correct image distortions.

Optimized parallel transmission pulses using IMPULSE and VERSE algorithms to reshape RF waveforms.

Multiband radio frequency pulses encode magnetic resonance signals from multiple slices simultaneously, reducing scan time compared to serial acquisition.

A slice-selective adiabatic magnetization preparation pulse generates T2-weighted contrast.

Phase-encoding gradients activate before RF pulses to reduce acoustic noise and gradient load during diffusion-weighted magnetic resonance measurements.

A magnetic resonance method corrects signal intensity data using receiver coil characteristics to ensure uniform image quality.

Adapting acquisition parameters or reconstruction algorithms with motion tracking data to resolve gradient moment accumulation inconsistencies.

Overlapping field of view acquisition extracts fluid flow data without contrast agents or breath holding, resolving invasiveness and complexity trade-offs.

Combining SSFP-FID and dual-echo SSFP sequences eliminates T2* bias and reduces acquisition time for accurate relaxation mapping.

Adjusting slice-selection gradient waveforms with time-varying VERSE factors reduces RF transmit power while maintaining signal noise ratio and image contrast.

NMR-distinguishable stereoisomers enable ratiometric CEST imaging independent of agent concentration, ensuring accurate pH and temperature mapping.

Bipolar gradient fields in steady-state free precession sequences reduce motion artifacts from patient movement while maintaining high image resolution.

Modulating the inversion slab shape matches bolus width with inter-pulse spacing, resolving tSNR loss from varying arterial velocities.

Multicomponent Bayesian framework segments mixed voxels into specific tissue types using reduced dictionaries, resolving partial volume artifacts in MRI.

CEST MRI detects tumor glutaminase activity via glutamate mapping, resolving low spatial resolution and signal overlap issues.

Merging T2 and diffusion pulse sequences resolves the contradiction between comprehensive tissue information and imaging time.

Iterative parameter testing selects optimal slice multiplexing settings to reduce acquisition time while maintaining image quality.

An off-resonance RF pulse induces a B1-dependent resonant frequency shift to spatially encode spins without dedicated gradient coils.

A magnetic resonance scanner acquires k-space data using two-dimensional spatial encoding to reconstruct volumetric images.

Axial and azimuthal slits in MRI RF shields suppress gradient eddy current heating without capacitors, maintaining RF transparency.

A multi-coil magnetic resonance imaging method determines coil-specific base phases to correct pixel phase data.

A flexible local coil with specialized antennas positions precisely on the temporomandibular joint to capture high-frequency magnetic resonance signals.

Turbo spin echo sequences acquire in-phase and out-of-phase MR signals with unequal signal-to-noise ratios for Dixon water-fat separation.

Adjusting slew rate and amplitude within repetition intervals minimizes eddy currents and peripheral nerve stimulation while maintaining image quality.

Correction coefficients for transmitter and receiver coils adjust specific absorption rate calculations, preventing overestimation that restricts MRI operation.

MRF-X models magnetic exchange between compartments to quantify T1 and T2 values in myocardial tissue.

A magnetic resonance imaging shim unit applies distinct settings across segmented scanning blocks to adjust the primary magnetic field.

Scaling factor correction removes gas-phase contamination from dissolved-phase datasets, improving pulmonary gas exchange measurement accuracy.

Dynamic scan parameter adjustment prevents thermal runaway while reducing chiller capacity requirements.

Adjusting gradient pulse waveforms in magnetic resonance sequences reduces acoustic noise and helium boil-off while maintaining imaging speed.

An MRI apparatus detects heart boundaries to automatically derive precise imaging ranges for subsequent scans.

Varying readout gradient strength in zero echo time sequences separates water and fat signals despite incomplete k-space data.

Polarity-specific calibration data separates measurement data from collapsed echo planar simultaneous multi-slice acquisitions.

Pseudo-random phase encoding transforms coherent aliasing into incoherent patterns, retaining signal-to-noise ratio during high-acceleration parallel imaging.

Neural network translates coil mixing matrix deviations into motion scores for prospective artifact detection.

An artificial neural network designs magnetic resonance pulse sequences with user-controllable acquisition periods and flip angles.

A trained neural network converts single-channel transmit data into parallel transmission-like images.