Matches 51 - 94 out of 94 < 1 2
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5916161 Magnetic resonance imaging apparatus with temperature measurement function  
A magnetic resonance imaging apparatus capable of measuring a temperature increase due to an application of RF magnetic fields for data acquisition purpose, and notifying an information on the...
5690109 Method of destructive, noninvasive hyperpyrexia of tissues and organisms utilizing nuclear magnetic resonance  
A method of selectively heating targeted cells within a specimen while avoiding heating of non-targeted cells is provided. The method comprises the steps of: (a) determining at least one...
5602477 Nuclear magnetic resonance freezing sensor  
A non-invasive apparatus and method for determining changes in the enthalpy of an object undergoing a freezing cycle using nuclear magnetic resonance (NMR) imaging (NMRI) techniques. Enthalpy is...
5572127 Inhomogeneities in static magnetic fields near superconducting coils  
Inhomogeneities in the magnetic field in the vicinity of a superconducting NMR receiver coil are avoided by placing the probe, at about room temperature, within the magnetic field, cooling rapidly...
5545994 Reduction of ambient susceptibility perturbations of an NMR spectrometer  
The volume magnetic susceptibility of an NMR probe is established and maintained at a desired value, such as a value characterizing other components of the probe, by a linear combination of partial...
5530353 Variable temperature NMR probe  
A variable temperature NMR probe having a RF coil surrounding a sample position and a fluid jacket for conveying fluid to control the temperature at the sample position. An RF electromagnetic...
5508613 Apparatus for cooling NMR coils  
In Nuclear Magnetic Resonance (NMR) spectroscopy and microscopy, noise from the receiver coil of the probe limits sensitivity. This noise may be reduced by cooling the receiver coil. Noise may be...
5492122 Magnetic resonance guided hyperthermia  
A hyperthermia treatment apparatus includes an annular radio frequency (RF) antenna array with bolus that is compatible with a magnetic resonance imaging (MRI) machine. Antenna elements polarized...
5462055 MRI/hyperthermia dual function antenna system  
An MRI machine RF body coil is arranged so that it can also function as a hyperthermia treatment apparatus by arranging the RF body coil as an array of individual antenna element connected to each...
5397987 Method and apparatus for analyzing samples using nuclear magnetic resonance  
A magnetic resonance analyzing apparatus includes a sampling region; a first temperature stabilization assembly for maintaining the sampling region at a predetermined temperature; a magnet for...
5378987 Method and apparatus for non-invasive measurement of temperature distribution within target body using nuclear magnetic resonance imaging  
A non-invasive measurement of a temperature distribution within a target body using a nuclear magnetic resonance imaging, capable of realizing a high speed and a high precision measurement, and...
5300888 NMR thermal analyzer  
A method is provided for carrying out proton magnetic resonance thermal analysis measurements. To this end, the method provides locating a sample within a coil forming part of an RF tuned circuit...
5298864 Nuclear magnetic resonance spectrometer and method for measuring the nuclear magnetic resonance  
A nuclear magnetic resonance spectrometer comprises a sample holder being arranged in a constant magnetic field of a predetermined direction. The sample holder comprises a rotor adapted to receive...
5284144 Apparatus for hyperthermia treatment of cancer  
A hyperthermia applicator/MRI probe assembly for hyperthermia treatment of a subject. The assembly includes a hyperthermia applicator for heating target regions of a subject and a MRI probe which...
5263482 Thermographic imaging  
There is provided a method of and apparatus for thermographic imaging involving the use in electron spin resonance enhanced magnetic resonance imaging (ESREMRI) of a paramagnetic contrast agent...
5247256 RF receiver coil arrangement for NMR spectrometers  
In the case of a nuclear magnetic resonance spectrometer containing a sample (1) arranged in a homogeneous magnetic field and being adjusted approximately to room temperature or a higher...
5229722 NQR-imaging  
In an imaging method for spectroscopy of nuclear quadrupole resonances (NQR) with solid samples to which an RF field having a pulse duration t p with a base amplitude B 10 constant over the...
5207222 Method and apparatus for measuring temperature of subject  
Based on the relation that the higher the temperature of a portion to be measured, the lower becomes coherence of a nuclear spin at that portion, the present invention measures indirectly the...
5192910 Temperature-control device for samples  
In a temperature-control device for samples, in particular for NMR spectroscopy, comprising a vessel (20) provided with an opening (19) for receiving a measuring sample (1), an inlet opening (10)...
5109853 Remote temperature monitoring apparatus and technique  
A thermometry system comprising an implantable element having temperature dependent NMR properties, apparatus for applying an RF field to the implantable element, and apparatus for sensing the...
4914608 In-vivo method for determining and imaging temperature of an object/subject from diffusion coefficients obtained by nuclear magnetic resonance  
A method of determining and imaging the temperature or temperature change of a liquid or solid object by NMR placing the object in a magnetic field B o at a temperature T o i , subjecting the...
4862085 Method of regulating the magnetic field delivered by a resistive magnet, a resistive magnet system using this method and an installation for forming images by nuclear magnetic resonance incorporating such a system  
A system is provided for regulating the field of a high homogeneity magnet. The fluid used for cooling the main magnet is placed in thermal contact with a high homogeneity auxiliary magnet in which...
4663592 NMR image forming apparatus  
The static magnetic fields of an NMR imaging apparatus should be maintained constant in intensity in order to obtain satisfactory NMR images. Coils used to generate the static magnetic fields, and...
4590428 Electromagnet for NMR tomography  
An electromagnet for generating the constant magnetic field required in NMR tomography includes a superconductive coil system consisting of at least one circular cylindrical field coil (1) and at...
4558279 Methods for detecting and imaging a temperature of an object by nuclear magnetic resonance  
A novel and improved method to detect indirectly a temperature of an object employing nuclear magnetic resonance techniques (NMR). The method involves obtaining an NMR spectrum to determine...
4499190 Method of detecting sulfur dioxide  
(CH 3 ) 3 SiNSO is produced by the reaction of ((CH 3 ) 3 Si) 2 NH with SO 2 . Also produced in the reaction are ((CH 3 ) 3 Si) 2 O and a new solid compound [NH 4 ][(CH 3 ) 3 SiOSO 2 ]....
4489275 High temperature sample heating for spectroscopic studies apparatus  
In accordance with the invention, an improved sample heating apparatus is provided comprising an evacuated cylindrical envelope having a first portion of reduced diameter and capable of fitting...
4480239 Loop-gap resonator network  
A lumped circuit loop-gap resonator is formed by a plurality of openings formed through a block of material. The openings form inductive loop elements and these are interconnected in a variety of...
4461996 Nuclear magnetic resonance cell having improved temperature sensitivity and method for manufacturing same  
A nuclear magnetic resonance (NMR) cell for use in a gyro is shown which is maintained at a predetermined temperature, established by testing. Testing of each cell is conducted by heating the cell...
4442404 Method and means for the noninvasive, local, in-vivo examination of endogeneous tissue, organs, bones, nerves and circulating blood on account of spin-echo techniques  
This invention relates to methods and means for improving the sensitivity and signal-to-noise ratio of spin-echo measurements on samples, which have to remain at their own temperature and which...
4435680 Microwave resonator structure  
A microwave resonator is formed by a cylindrical loop and one or more gaps which extend along its length. The loop is formed from a machineable insulating material and a layer of electrically...
4284949 Nuclear magnetic resonance spectrometer and method  
A nuclear magnetic resonance technique that allows simultaneous temperature determination and spectral acquisition. The technique employs a modification of the lock circuit of a Varian XL-100...
4266194 Sensor for VT probes  
Accurate non-invasive temperature control of NMR samples without reduction of spectral quality is provided by placement of multiple sensors in the probe structure, the output of said sensors being...
4240033 Method and apparatus for preventing ionization induced noise in decoupler experiments  
Apparatus and method for reduction of noise in NMR signals during high power heteronuclear decoupling experiments. A material is introduced into the evacuated area of the variable temperature probe...
3987361 Nuclear magnetic resonance temperature equilibration and method for oil in wax determination  
An apparatus for rapidly conditioning wax samples and a method for determining the oil content of said samples with a nuclear magnetic resonance analyzer are described. A molten wax sample is...
3921060 VHF-band pulse radiospectrometer for the study of nuclear quadrupole resonance in solid specimens  
A VHF-band pulse radiospectrometer for the study of nuclear quadrupole resonance in solid specimens, comprising a high-frequency pulse oscillator having an inductance coil adapted to accommodate...
3810254 THERMOSTATIC SYSTEM FOR NUCLEAR GYROMAGNETIC RESONANCE SPECTROSCOPIC PERMANENT MAGNET APPARATUS  
A thermostatic system for nuclear gyromagnetic resonance spectroscopic permanent magnet apparatus comprising a thermostatic oven structure consisting of a first and second thermostatic ovens...
3775670 HIGH BANDWIDTH - TIME PRODUCT SPIN ECHO SYSTEM  
A system for the generation of a spin-echo signal utilizing a paramagnetic sample of titanium dioxide (rutile) selectively doped with nickel wherein the crystalline electric field of the rutile...
3671855 BROADBAND ZERO FIELD EXCHANGE ECHO SYSTEM  
A system for the generation of an "exchange echo" signal similar to a spin echo signal utilizing a very heavily doped sample such as rutile, having paramagnetic defect centers in the order of 1 ×...
3663952 ELECTRON SPIN ECHO SYSTEM HAVING RF PULSE INVERSION PREPARATION OF THE SPIN ECHO SAMPLE  
Method and apparatus for inverting the population of a pair of adjacent spin levels associated with a spin-echo sample when situated in a unidirectional magnetic field by means of a preparatory...
3621378 SAMPLE-THERMOSTATTING DEVICE FOR RADIO-FREQUENCY SPECTROMETERS NOTABLY NMR SPECTROMETERS  
A device for thermostating samples in radio-frequency spectrometers including a circuit for comparing voltages corresponding to the preset temperature of thermostatting and the actual temperature...
3525928 TEMPERATURE VARIABLE SAMPLE APPARATUS FOR NMR ANALYSIS  
3502964 GYROMAGNETIC RESONANCE SPECTROMETER EMPLOYING A TEMPERATURE DEPENDENT RESONANCE LINE TO SENSE TEMPERATURE OF THE SAMPLE  
3403325 Apparatus for and method of measuring thermal stress by nuclear resonance  
Matches 51 - 94 out of 94 < 1 2