Methods are described for quantifying an amount of natural rubber in a plant from a sample of the plant by obtaining a NMR spectrum and analyzing the signal peaks for the natural rubber in the plant sample and a standard component tested in combination with the plant sample. The NMR testing is conducted on a liquid state sample of a solution containing dissolved plant sample and standard component. A pre-determined and known amount of standard component is present in the liquid state sample and provides a reference for calculating an estimated amount of natural rubber in the plant sample. The estimated amount of natural rubber in the sample can be used to quantify the amount of extractable rubber in the sampled plant.

The invention provides a method for performing a magnetic resonance measurement of an element in a target region, wherein the element has a magnetic resonance excitation spectrum peak with a linewidth L.sub.R, wherein the method comprises a measurement cycle (100) comprising: a magnetization transfer stage (110) comprising providing a plurality of pulses (115) of first radiation to the target region, wherein the plurality of pulses (115) are selected to provide a net pulse having a net pulse angle .sub.N1, and wherein the first radiation comprises a first frequency spectrum peak having a first linewidth L.sub.F, wherein the first frequency spectrum peak at least partially overlaps with the magnetic resonance excitation spectrum peak, and wherein L.sub.F5*L.sub.R; an excitation stage (130) comprising providing a radio frequency pulse to the target region, wherein the radio frequency pulse excites the element resulting in a transverse magnetization of the element; and a measurement stage (140) comprising detecting a signal from the element, wherein the measurement stage (140) is temporally arranged at an echo time TE after the radio frequency pulse, wherein the echo time TE is smaller than a transverse relaxation time of the element in the target region.

A method for performing magnetic resonance imaging is provided. The method includes providing a magnetic resonance imaging system comprising: a radio frequency receive system comprising a radio frequency receive coil, and a housing, wherein the housing comprises a permanent magnet for providing an inhomogeneous permanent gradient field, a radio frequency transmit system, and a single-sided gradient coil set. The method also includes placing the receive coil proximate a target subject; applying a sequence of chirped pulses via the transmit system; applying a multi-slice excitation along the inhomogeneous permanent gradient field; applying a plurality of gradient pulses via the gradient coil set orthogonal to the inhomogeneous permanent gradient field; acquiring a signal of the target subject via the receive system, wherein the signal comprises at least two chirped pulses; and forming a magnetic resonance image of the target subject.

1H-NMR spectroscopic molecular markers are provided for identifying medical risk signatures such as SARS-CoV-2 infection, acute inflammation, or a cardiovascular risk condition. The markers use a combination of NMR intensity signals, including a Glyc signal from at least one N-acetyl (NCOCH.sub.3) glycoprotein and an SPC signal from a choline head group (.sup.+N(CH.sub.3).sub.3) of a supramolecular phospholipids cluster (SPC) present in HDL and LDL lipoprotein subfractions. The Glyc signal is in a chemical shift region from #=2.00 ppm to #=2.20 ppm, and includes signals GlycA (2.00 ppm to 2.09 ppm) and GlycB (2.09 ppm to 2.2 ppm). The SPC signal is in a chemical shift region from #=3.20 ppm to #=3.30 ppm, and includes signals SPC.sub.1 (3.2 ppm to 3.235) ppm, SPC.sub.2 (3.235 ppm to 3.26 ppm), and SPC.sub.3 (3.26 ppm to 3.3 ppm). A system for identifying the markers is also provided.

A method for producing an image of a subject with a magnetic resonance imaging (MRI) comprises acquiring a first set of partial k-space data from the subject and generating a phase corrected image based on a phase correction factor and the first set of the partial k-space data. The method further includes transforming the phase corrected image into a second set of partial k-space data and reconstructing the image of the subject from the second set of the partial k-space data and a weighting function.

A solid state electronic spin system contains electronic spins disposed within a solid state lattice and coupled to an electronic spin bath and a nuclear spin bath, where the electronic spin bath composed of electronic spin impurities and the nuclear spin bath composed of nuclear spin impurities. The concentration of nuclear spin impurities in the nuclear spin bath is controlled to a value chosen so as to allow the nuclear spin impurities to effect a suppression of spin fluctuations and spin decoherence caused by the electronic spin bath. Sensing devices such as magnetic field detectors can exploit such a spin bath suppression effect, by applying optical radiation to the electronic spins for initialization and readout, and applying RF pulses to dynamically decouple the electronic spins from the electronic spin bath and the nuclear spin bath.

A method of data acquisition at a magnetic resonance imaging (MRI) system is provided. The system receives at least a portion of raw data for an image, and detects anomalies in the portion of raw data received. When anomalies are detected, the system can correct those anomalies dynamically, without waiting for a new scan to be ordered. The system can attempt to scan the offending portion of the raw data, either upon detection of the anomaly or at some point during the scan. The system can also correct anomalies using digital correction methods based on expected values. The anomalies can be detected based on variations from thresholds, masks and expected values all of which can be obtained using one of the ongoing scan, previously performed scans and apriori information relating to the type of scan being performed.

A solid state electronic spin system contains electronic spins disposed within a solid state lattice and coupled to an electronic spin bath and a nuclear spin bath, where the electronic spin bath composed of electronic spin impurities and the nuclear spin bath composed of nuclear spin impurities. The concentration of nuclear spin impurities in the nuclear spin bath is controlled to a value chosen so as to allow the nuclear spin impurities to effect a suppression of spin fluctuations and spin decoherence caused by the electronic spin bath. Sensing devices such as magnetic field detectors can exploit such a spin bath suppression effect, by applying optical radiation to the electronic spins for initialization and readout, and apply-ing RF pulses to dynamically decouple the electronic spins from the electronic spin bath and the nuclear spin bath.

Fast quantitative NMR data acquisition for NMR scans performed on a sample is provided. Scan batches on the sample are performed, where each batch comprises a long delay scan, followed by a set of short delay scans. Each scan is associated with a corresponding scan time point in relation to the long delay scan time point of the respective scan batch. For each corresponding scan time point, aggregated NMR spectrum portions are determined showing a decay over time, which is fitted with an exponential decay function. An averaged integral loss is computed for each scan time point. For each NMR spectrum of the scan batches, an integral associated with a respective region of interest is multiplied with a corresponding correction factor. The integrals associated with the corrected NMR spectra are summed to obtain a representation of the NMR signal intensity in the region of interest for the sample.

In a radio frequency (RF) coil for a magnetic resonance imaging (MRI) system, the RF coil includes loops that are radially arranged. At least some areas of each of the loops overlap each other at a central portion of a radial structure formed by the loops.