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7609064 Probe configured for NMR apparatus and NMR apparatus using the same  
A probe for a nuclear magnetic resonance apparatus comprises: a transmission coil for irradiating a sample with a high-frequency electromagnetic wave; and a receiving coil for detecting a nuclear...
7602185 Magnetic resonance imaging apparatus and magnetic resonance imaging method  
A magnetic resonance imaging apparatus performs photographing by magnetic resonance imaging using hardware of which temperature is likely to rise due to a photographing operation. The magnetic...
7557577 Water-soluble paramagnetic substance reducing the relaxation time of the coolant in an MRI system  
The invention relates to the use of a water-soluble paramagnetic substance, in particular a magnetic resonance contrast medium, to reduce the magnetic resonance relaxation time of a coolant for...
7542793 MR-guided breast tumor ablation and temperature imaging system  
An MRI system is employed to aim an ultrasonic transducer at tissues to be treated and to produce images which enable the treatment of the tissues to be monitored. A pulse sequence is used which...
7521930 Method and apparatus for accelerating magnetic resonance temperature imaging  
In a method and apparatus for accelerating MR temperature imaging used in MR-monitored high intensity focused ultrasound (HIFU) therapy, temperature changes are determined at the focus of the...
7505805 Self-referencing/body motion tracking non-invasive internal temperature distribution measurement method and apparatus using magnetic resonance tomographic imaging technique  
A noninvasive image measuring method of measuring internal organ/tissue temperature using an MRI system. Temperature measurement insusceptible to body motion and spatial variation of magnetic field...
7489132 Enhanced heat transfer in MRI gradient coils with phase-change materials  
An MRI apparatus includes a MRI gradient coil and an MRI cooling system. The MRI cooling system is thermally connected to the MRI gradient coil and includes a cooling circuit. A chiller is...
7474099 NMR apparatus with commonly cooled probe head and cryogenic container and method for the operation thereof  
An NMR apparatus comprising an NMR magnet system disposed in a first cryocontainer ( 2 ) of a cryostat ( 9 ), and an NMR probe head ( 1 ), wherein the first cryocontainer ( 2 ) is installed in an...
7432708 Temperature control method for a permanent magnet arrangement of a magnetic resonance system  
In a temperature control method for magnetic field components of a permanent magnet arrangement of a magnetic resonance system, temperature stability of the magnetic field components is achieved by...
7423429 Apparatus and associated method that integrate the modalities of diagnosis and therapy to treat, in principle, pathologies generically identified as Cancer and HIV/AIDS  
Diagnostic and Therapy apparatus and methods use non-ionizing radiations which are based on integration of nuclear magnetic resonance and radiation manipulation. Quantitative diagnostics integrate...
7403007 Nuclear magnetic resonance probe with cooled sample coil  
In a nuclear magnetic resonance probe, the sample coil is connected to the RF excitation source via transmission lines that are arranged to generate one or more nodal points at the 1 H excitation...
7378847 Efficiently cryo-pumped NMR cryogenic probe  
The vacuum properties of a cryogenic NMR probe maintained at a desired operating temperature by a cold head heat exchanger are improved by a separate heat exchanger operating below the temperature...
7359745 Method to correct magnetic field/phase variations in proton resonance frequency shift thermometry in magnetic resonance imaging  
PRF shift MRI data is acquired. The PRF shift MRI data may include signals affected by both a desired PRF shift and an undesired PRF shift. Thus, example systems and methods describe manipulating...
7309987 Anticipative temperature regulation of cryogenic NMR probes  
In some embodiments, a nuclear magnetic resonance (NMR) method comprises generating an indicator of an anticipated time-averaged power for a radio-frequency (RF) pulse set, and anticipatively...
7248050 NMR apparatus  
The invention concerns an NMR apparatus ( 1 ) comprising an NMR spectrometer ( 2 ) for sequential investigation of several samples in sample containers ( 6 ) of substantially identical geometrical...
7245126 NMR method and apparatus  
There is disclosed an NMR measurement method and NMR apparatus in which the temperature of the NMR detection coil or the RF irradiation coil hardly varies if pulsed RF power is applied to the coil...
7049817 Thermostat-controlled containment cell for samples intended for NMR measurements and method for implementing it  
A thermostatically controlled containment cell for a sample, suitable notably for a measuring device such as a nuclear magnetic resonance (NMR) spectrometer, NMR type measuring device including the...
7015692 Apparatus for active cooling of an MRI patient bore in cylindrical MRI systems  
The present invention provides for a cooling system for circulating a coolant to cool the patient bore. In one embodiment, that patient bore consists of two concentric cylinders separated by...
7002346 Method for accurate determination of sample temperature in a NMR check weighing system  
A method ( 10 ) permits determining the temperature in a magnetic resonance check weighing system ( 24 ) of a sample in a container ( 22 ) on a production line at the time of magnetic resonance...
6977501 MRI apparatus and method for calculating predicted and/or actual net accumulated gradient coil heat and/or temperature  
A magnetic resonance imaging apparatus includes a calculator that calculates the quantity of heat generated (or to be generated) in a gradient magnetic field coil as a function of current supplied...
6914430 NMR probe  
A nuclear magnetic resonance (NMR) probe is offered which can minimize positional shift of the detector portion caused by shrinkage of the support post due to cooling of the detector portion. The...
6906517 Method and apparatus for maintaining thermal stability of permanent magnets in MRI systems  
Briefly in accordance with one aspect, the present technique provides a method for heating a permanent magnet in a magnetic resonance imaging system. The method for heating a permanent magnet...
6894495 Air feed device, signal acquisition device and imaging device  
An air feed device comprises a fluid motor to drive rotating vanes and blow air with high efficiency into a space accommodating a subject in a magnetic resonance device. The air feed device does...
6891375 Static field controlling method and MRI apparatus  
The temperature of permanent magnet blocks embedded in several positions in permanent magnets and base yokes will be adjusted by device of a heater to improve the static field uniformity.
6873154 Algorithmic cooling  
A method for decreasing entropy of a quantum system, for example nuclear spins. The quantum system comprising at least two subsystems, a first subsystem of elements with a first relaxation time...
6825667 Magnetic resonance imaging apparatus and method for maintaining high uniformity of magnetic field in magnetic resonance imaging apparatus  
A magnetic resonance imaging apparatus includes a unit (shim coil) that corrects uniformity of a magnetic field, a temperature detecting unit that detects a temperature of a magnet or its...
6812705 Coolant cooled RF body coil  
A thermal barrier is introduced to a magnetic resonance imaging system between the patient bore and each of the gradient coil assembly and RF body coil assembly to maintain the temperature within...
6768917 Magnetic resonance imaging method and system  
A method of forming a magnetic resonance image involves separate measurement of the position of a measuring site. The magnetic resonance image is corrected on the basis of the measured position of...
6768305 Temperature controlled sample changer for NMR analysis  
A queue of samples for NMR analysis is disposed within a thermally isolate NMR magnet bore and distal elements of the queue approach thermal equilibrium concurrently with NMR analysis of a sample...
6768304 On-flow preheating in NMR measurements  
An NMR experiment is carried out with a probe having an inlet tubing connected to a flow cell and a twisted-pair wire is tightly wrapped around the inlet tubing in a helical manner to serve as a...
6731113 Method of and device for the compensation of variations of the main magnetic field during magnetic resonance imaging  
At least one quantity which is characteristic of the temperature-dependent magnetic properties of magnetizable material which interacts with the magnetic fields of a magnetic resonance imaging...
6653835 Magnetic resonance tomograph with a temperature controller for thermally highly sensitive components  
A magnetic resonance tomography apparatus, in particular an iron-guided or permanently magnetic, short or open magnetic resonance tomography apparatus, has thermally highly sensitive components and...
6615069 Magnetic resonance imaging device  
An MRI apparatus and method in which image data is produced using NMR signals obtained in plural measurements performed at different times respectively. Data is calculated indicating temperature...
6605945 Superconducting NMR resonators with macroscopically homogeneous superconductor distribution  
An NMR resonator for receiving RF signals at desired resonance frequencies from a measuring sample in a volume under investigation disposed about a coordinate origin (x,y,z=0), with a means for...
6577125 Temperature compensated magnetic field apparatus for NMR measurements  
An apparatus is disclosed for generating a magnetic field of high field strength, spatial uniformity and minimal drift of magnetic field intensity over a temperature range of about 0° C. to 175°...
6566878 Magnetic resonance imaging device and method therefor  
Variations in spatial phase distribution due to static magnetic field changes are corrected based on phase variations at points, specifically, at three points or a plurality of points selected by...
6559644 MRI-based temperature mapping with error compensation  
Magnetic resonance temperature change monitoring of a heated portion of a tissue mass undergoing thermal treatment is more accurately accomplished by compensating for false temperature change...
6545474 Controlling method of superconductor magnetic field application apparatus, and nuclear magnetic resonance apparatus and superconducting magnet apparatus using the method  
A controlling method for a nuclear magnetic resonance apparatus. The method includes: (A) cooling the high-temperature superconductor at a magnetization low temperature sufficiently lower than a...
6522142 MRI-guided temperature mapping of tissue undergoing thermal treatment  
Systems and methods using magnetic resonance imaging for monitoring the temperature of a tissue mass being heated by energy converging in a focal zone that is generally elongate and symmetrical...
6522135 Nuclear quadrupole resonance (NQR) method and probe for generating RF magnetic fields in different directions to distinguish NQR from acoustic ringing induced in a sample  
A nuclear quadrupole resonance (NQR) method and probe for generating RF magnetic fields in different directions to distinguish NQR from acoustic ringing induced in a sample. Generally, an RF...
6489769 Nuclear magnetic resonance apparatus  
A nuclear magnetic resonance apparatus including: a cup-shaped high-temperature superconductor 20 having a hollow cylindrical shape or portion cooled to not more than a superconducting transition...
6445183 Magnetic resonance image diagnosing apparatus  
A burst wave 91 is applied as an RF magnetic filed in order to excite nuclei of hydrogen, and also a oradient magnetic field 95 along a readout direction is applied so as to excite...
6377834 Real time in vivo measurement of temperature changes with contrast enhanced NMR imaging  
NMR images indicative of thermal changes in tissues undergoing therapy are produced using a gradient-recalled echo pulse sequence. Prior to therapy a contrast agent which shortens spin T 1 ...
6297634 MRI magnetic field generator  
An MRI-use magnetic field generator structured such that there is no loss of magnetic field uniformity, temperature fluctuation is reduced and thermal efficiency enhanced, and the temperature of...
6252405 Temperature compensated NMR magnet and method of operation therefor  
An MRI system includes a magnet which produces the main polarizing magnetic field. Variations in strength of this field are corrected by a temperature compensation system that calculates a...
6222364 Method of nuclear quadrupole resonance testing and method of configuring apparatus for nuclear quadrupole resonance testing  
A method of Nuclear Quadrupole Resonance testing a sample containing a given species of quadrupolar nucleus, the sample being subjected to an inhomogeneous distribution of an extrinsic parameter...
6218835 Accelerating NMR sample thermal equilibration by RF heating  
Radio-frequency (RF) heating is used to accelerate the thermal equilibration of dielectrically lossy nuclear magnetic resonance (NMR) samples. High-power heating RF pulses are applied to the sample...
6194899 Temperature monitoring method, temperature monitoring apparatus and magnetic resonance apparatus  
An absolute temperature measuring pulse sequence is executed and, subsequently, a relative temperature measuring pulse sequence is repeatedly executed. Since while a relative temperature can be...
6032068 Non-invasive measurement of frozen tissue temperature using MRI signal  
Temperature in frozen tissue can be measured from magnetic resonance signals from the frozen tissue based on spin-spin relaxation time (T2) or based on relative intensity of the magnetic resonance...
6025719 Nuclear magnetic resonance method and apparatus  
Net magnetic flux trapped in an NMR high temperature superconducting RF probe coil magnetically coupled with a main excitation DC magnetic field of an NMR device of which the probe is a part is...
Matches 1 - 50 out of 94 1 2 >