摘要:
N-(4-methoxybenzylidene)-4''-O-n-butyrylaminophenol and 4methoxy- or 4-ethoxybenzylidene-4''-n-butyl aniline form enantiotropic nematic phases which are stable at room temperature or slightly above. If as third component 4-capronylhydroxy benzoic acid-4-4''-alkoxy phenol ester is added wherein alkoxy stands for ethoxy and butoxy, nematic phases are obtained which have melting points below O* C. The new nematogenic mixtures are useful for example as solvents for the NMR-spectroscopy.
摘要:
Apparatus for operating MRI is disclosed. The apparatus comprises: a control for operating an MRI scanner to carry out an MRI scan; an input for receiving first and second MRI scans respectively at the beginning and end of a predetermined time interval post contrast administration; a subtraction map former for forming a subtraction map from the first and the second MRI scans by analyzing the scans to distinguish between a population in which contrast clearance from the tissue is slower than contrast accumulation, and a population in which clearance is faster than accumulation; and an output to provide an indication of distribution of the populations. The control is configured to carry out the first scan at least five minutes and no more than twenty minutes post contrast administration and to carry out the second scan such that the predetermined time period is at least twenty minutes.
摘要:
A dynamic field camera arrangement for monitoring electromagnetic field behavior in a spatial region comprises a main magnetic field and a radiofrequency (RF) field limited to a first RF band, particularly in an MRI or NMR apparatus. The arrangement comprises a magnetic field detector set comprising a plurality of low-frequency magnetic field detectors, each one of said magnetic field detectors comprising a magnetic resonance (MR) active substance, means for pulsed MR excitation of said substance and means for receiving an MR signal generated by said substance, wherein said pulsed excitation and said MR detector signal is in a second RF band that does not overlap said first RF band. The MR signal receiving means comprise a first RF filter which suppresses RF signal from said first RF band and transmits RF signal from said second RF band.
摘要:
This invention features devices and methods for analyte processing and detection, and use of such methods, e.g., in the treatment and diagnosis of disease or determining the presence of a pathogen.
摘要:
A system and method performing a medical imaging process includes arranging a subject to receive an exogenously administered free radical probe, performing an Overhauser-enhanced MRI (OMRI) imaging process to acquire data from the subject, and reconstructing the data to generate a report indicating a spatial distribution of free radicals in the subject.
摘要:
A method of detecting a target biochemical molecular species or at least one property correlated with the occurrence of the biochemical molecular species in a sample whose main component is water. The method includes: obtaining a sample whose main component is water; providing Functionalized Paramagnetic Particles (FPP) including a paramagnetic core and a moiety configured to interact with the target biochemical molecular species or with molecules collectively reporting on a property of the target biochemical molecular species; contacting the FPP with the sample; exposing the sample to an applied magnetic field; measuring a change in a nuclear relaxation property of the sample; and correlating the change to the presence of the biochemical molecular species in the sample or to at least one property correlated with the occurrence of the biochemical molecular species in the sample.
摘要:
The present invention relates to a magnetic resonance structure with a cavity or a reserved space that provides contrast and the additional ability to frequency-shift the spectral signature of the NMR-susceptible nuclei such as water protons by a discrete and controllable characteristic frequency shift that is unique to each MRS design. The invention also relates to nearly uniform solid magnetic resonance T2* contrast agents that have a significantly higher magnetic moment compared to similarly-sized existing MRI contrast agents.
摘要:
A method of detecting a target biochemical molecular species or at least one property correlated with the occurrence of the biochemical molecular species in a sample whose main component is water. The method includes: obtaining a sample whose main component is water; providing Functionalized Paramagnetic Particles (FPP) including a paramagnetic core and a moiety configured to interact with the target biochemical molecular species or with molecules collectively reporting on a property of the target biochemical molecular species; contacting the FPP with the sample; exposing the sample to an applied magnetic field; measuring a change in a nuclear relaxation property of the sample; and correlating the change to the presence of the biochemical molecular species in the sample or to at least one property correlated with the occurrence of the biochemical molecular species in the sample.
摘要:
A method for characterizing regions on a map or image generated from diffusion image data of a region of a patient's body, including: loading into a data processing device image data achieved by calculation from MR diffusion imaging; providing a first threshold level to distinguish pixels with image data values that are above or below the values found that are not representative of pathological portions of the region; providing a second threshold level higher than the first threshold; deriving a measure related to the gradient pattern of those pixels that lie within a margin zone defined by those pixels that satisfy a criterion of the second threshold but do not satisfy a criterion of the first threshold and; outputting the measure related to the gradient as a parameter indicative of the likelihood that the pixels that are within the margin zone and/or a region of the body part are cancerous.