Measurements Using NMR Spectroscopy TRIZ Cases

Outer volume suppression modules reduce magnetic resonance signal leakage in adjacent slices using multiband radio frequency pulses.

Variable delay multi-pulse CEST method acquires images with varying waiting periods to detect magnetization changes in mobile solute molecules.

Interleaved radiofrequency pulse sequences differentiate carbon dioxide signals from bicarbonate saturation, enabling accurate in vivo pH measurement.

A multinuclear standard molecule integrates nitrogen, fluorine, and phosphorus atoms into a single structure.

A method exchanges nuclear spin polarization between nuclei with different gyromagnetic ratios to enhance magnetization signal strength.

A lock transmission sequencer modulates amplitude, frequency, or phase to excite a deuteron nucleus in an NMR probe.

RF coil apparatus modulates magnetic resonance signals to distinct frequencies for analog multiplexing and digital separation.

A planar inverse anapole microresonator confines microwave magnetic fields to picoliter volumes via a toroidal moment.

Iteratively adjusting phase and amplitude of a correction signal cancels transmitted components, enabling simultaneous transmission and reception.

A spectral circle method uses linear fractional transformations to compute geometric representations of MRI data.

A biometric method hyperpolarizes nuclear spins in target molecules using electron spin resonance to enhance signal intensity.

Phase cycling techniques separate desired NMR signals from interference through coherent combination of detected data.

A PANORAMIC waveform generates arbitrary phase relationships to transfer magnetization between nuclei using a single transmitter channel.

Replacing high-field NMR with portable low-field devices and internal standards reduces analysis time while maintaining accurate natural rubber quantification.

Hall effect sensors replace costly NMR probes to monitor magnetic field gradients along all three axes, correcting image artifacts from hardware imperfections.

Subtracting phase-adjusted transmit pulses from receive signals removes mutual inductance interference, improving SNR.

Gradient pulses encode spatial magnetic field variations to reconstruct high resolution NMR spectra from inhomogeneous well logging environments.

Magnetic resonance imaging apparatus suppresses metabolite signal components to improve eddy current correction processing.

A measuring device uses a high-quality filter coil and capacitance to amplify weak electromagnetic signals at low frequencies.

Replacing homodyne detection with photon counting leverages the Purcell effect to resolve low-spin sensitivity limits in EPR spectroscopy.

Multichannel RF navigators generate B0 field maps without spatial encoding, reducing scan time for dynamic noise correction.

A transmission line coil applies a tangential rf magnetic field to penetrate metal casings.

Targeting amine protons at 2.8-3.2 ppm enables non-invasive tumor monitoring by eliminating invasive contrast agents while maintaining high spatial resolution.

Process controls thermoplastic polymer crosslinking via chain transfer reagents to resolve strength and processability trade-offs.

Applying RF fields at n-times Larmor frequency suppresses first-order quadrupolar broadening without strict magic angle alignment.

Selective high-frequency pulses resolve overlapping signals in biofluids, enabling precise metabolite quantification with portable low-field NMR equipment.

A two-field nuclear magnetic resonance method transfers samples between high and low field volumes to manipulate spins with radio frequency pulses.

Multi-echo signal acquisition resolves B0 field deviations beyond phase wrap limits, enabling precise shimming without separate frequency adjustments.

Parallel transport capillaries within a temperature control fluid supply line simplify NMR flow cell assembly and connection points.

An inclined sample holder allows ergonomic loading into NMR spectrometers while a positioning device realigns the sample axis vertically for measurement.

A magnetic resonance sequence interleaves a low flip-angle water reference scan with spectroscopy data acquisition to enable rapid phase and B0 correction.

Halogenated polymer composites match sample susceptibility to eliminate shimming requirements and reduce signal distortion in high-field NMR.

A transmit RF coil system corrects attenuation using a two-dimensional B1 field map to achieve precise flip angles.

RF gradient encoding replaces bulky B0 magnets, reducing system cost while expanding sequence versatility.

Extracting the adjustment mechanism from the compact probehead resolves the contradiction between high angle precision and RF performance degradation.

Synthetic NMR spectra with background signals train neural networks to resolve overlapping peaks and reduce human interpretation errors.

A superconducting meander inductor emits an oscillating magnetic field to disrupt nuclear spins, enabling detection of thin samples under 1 μm thick.

Optical atomic magnetometers replace inductive coils to detect J-coupling parameters, resolving low-frequency sensitivity limits in zero-field NMR.

Segmented heated gas inlets and outlets compensate for end heat loss, reducing axial temperature gradients below 3°C for accurate spectral resolution.

A chemical-shift-encoded imaging method identifies unique seed points in a phasor-error plot to estimate field maps for component separation.

Magnetic resonance spectroscopy detects neurochemical markers in brain tissue to identify acute pain states and track therapy responses.

Segmenting volumetric scans into coded slices boosts signal-to-noise ratio without increasing radio-frequency energy absorption.

Frequency-swept RF excitation with quadratic phase profile spreads signal content along the slice-encoding direction.

Reducing optimization dimensionality minimizes computational effort and power consumption while maintaining magnetic field homogeneity in MRI systems.

NMR apparatus measures T2 relaxation times via CPMG pulse sequences to differentiate fluid properties near surfaces.

A lock data treatment system applies frequency correction offsets to compensate for magnetic field drift when lock and target coils occupy separate positions.

Cycling pulse gaps among discrete positions averages out bullseye artifacts from gated signals, eliminating sideband overlap into the baseband signal.

Ultra-low field NMR resolves molecular structures without bulky magnets, enabling rapid chemical warfare agent identification.

Automated NMR analyte quantification models 1D spectra using 2D chemical shifts to determine concentrations.

Fluorinated receptors shift 19F NMR resonances to identify analytes in complex mixtures.