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7615997 Simultaneous MR-excitation of multiple nuclei with a single RF amplifier  
A medical imaging system ( 2 ) excites multiple nuclei through a single RF amplifier ( 24 ). The medical imaging system ( 2 ) includes a magnet ( 10 ) that generates a main magnetic field (Bo) in...
7605001 Method of multidimensional NMR with simultaneous plural magnetization transfer, and NMR pulse sequence thereof  
There is disclosed an NMR measurement method of observing plural magnetization transfer patterns in one experiment and observing their respective time-modulated, evolved chemical shifts. In an...
7603157 Method and magnetic resonance imaging apparatus for compensating contrast inhomogeneities in magnetic resonance images  
In a method and magnetic resonance apparatus for compensation of contrast inhomogeneities in magnetic resonance images caused by spatial distributions of the radio frequency field associated with...
7576537 RF pulse applying method with an MRI apparatus which reduces vertical magnetization  
The present invention aims to receive a signal of tissue long in T2 at a relatively high level and suppress artifacts. When a magnetic resonance frequency of a component intended for measurement is...
7567081 Magnetic resonance non-balanced-SSFP method for the detection and imaging of susceptibility related magnetic field distortions  
Disclosed are methods and apparatuses for generating susceptibility-related contrast images, as induced, e.g., by marker material interventional devices used for passive MR-guided interventions, or...
7557576 Multi-slice fast magnetic resonance imaging  
Through advancing the phase of radio frequency (RF) excitation with each phase-encoding level, a method and apparatus increases the effectiveness of a Magnetic Resonance Imaging (MRI) device by...
7498809 Magnetic resonance imaging device with multiple RF coils applying half-pulse waveforms for selective excitation of a local region  
An MRI apparatus suitable for realizing selective excitation utilizing multiple RF transmitting coils (parallel transmission) is provided. This MRI apparatus is provided with, as an RF receiving...
7495439 MRI method for reducing artifacts using RF pulse at offset frequency  
A method for magnetic resonance imaging includes performing a preparatory stage of a MR pulse sequence with an MRI system in which a non-selective RF preparatory pulse is used having a bandwidth...
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...
7418287 Magnetic resonance imaging method with accelerated data acquisition  
A method of dynamic magnetic resonance imaging comprising acquiring undersampled magnetic resonance signals for successive temporal time slots. In a space spanned by geometrical space and temporal...
7382128 Magnetic resonance imaging system with a Class-E radio frequency amplifier  
A Class-E amplifier has been adapted for use in the radio frequency section of a magnetic resonance imaging (MRI) system. A drive signal is produced by modulating the envelope of a radio frequency...
7372270 Compensating for non-uniformity of excitation field in MRI  
A method and system are described for compensating for non-uniformity of excitation field B1+ in magnetic resonance imaging (MRI) of an object. The variation in the RF excitation field B1+ is...
7372265 Compensation of magnetic field disturbances due to vibrations in an MRI system  
A magnetic resonance imaging (MRI) system includes an examination volume ( 9 ), a main magnet system ( 17 ) for generating a main magnetic field (B 0 ) in the examination volume, a gradient magnet...
7342398 Method, device and magnetic resonance tomography system for monitoring emitted RF energy  
In a method, device and magnetic resonance tomography system for monitoring a radio-frequency apparatus in which radio-frequency pulses are emitted at temporal intervals and in which measurement...
7319323 Device and method using magnetic pattern on disk  
An embodiment of the invention relates to a device for performing NMR or ESR analysis. The device comprises a detection unit, a magnet, and a disk having a magnetic pattern. The detection unit...
7233145 Method for magnetic resonance imaging with correction for fluctuations in the tramsission field strength  
In a method for magnetic resonance imaging, whereby magnetic resonance signals in a region of interest of an examination subject are generated in an examination by applying radio-frequency pulses...
7197353 Sensitivity encoding MRI acquisition method  
A sensitivity encoding method (SENSE) is used to acquire an MR image having a reduced field of view. The number of aliased replicates caused by surrounding object boundaries is calculated for each...
7187172 Method for controlling an RF transmission device, and MR apparatus and RF device for implementing the method  
In a method for controlling a radio-frequency device, and a magnetic resonance tomography system and a radio-frequency control device wherein the method is implemented, the RF device of a magnetic...
7141973 Magnetic resonance experiments by spatial encoding using the RF transmission coil  
In a method of spatial encoding in magnetic resonance experiments, encoding kernels are imposed into the magnetization signal during the excitation or re-focussing process using a transmit array...
7123009 Synchronization of wireless transmitted MRI signals in MRI system  
In a MRI system having a FID detector unit and a computer unit for processing FID signals, phase errors introduced into the FID signal at the detector unit are corrected at the computer unit by...
7116106 Process and system for detecting and correcting errors in an MRI scan process  
An MRI pulse sequence control system includes a pulse sequence controller, a controller, and a performance monitor module. The pulse sequence controller generates pulse sequence control data. The...
7091720 Magnetic resonance tomography method and apparatus with suppression of ambiguity artifacts in spin echo images  
In a magnetic resonance tomography method and apparatus for avoiding peripheral interference signals in magnetic resonance tomography when using spin-echo sequences, the average frequency and the...
7084627 Method for triggering NMR measurement in a NMR check weighing system  
Magnetic resonance methods are provided for determining the mass of samples in vials ( 1 ) in a production line, each sample having a net magnetisation capability, including the steps of applying a...
7078900 Method and system of determining parameters for MR data acquisition with real-time B1 optimization  
The present invention provides a system and method of MR scan prescription to achieve in a fast, simple, and effective manner the optimal peak excitation field strength for a given pulse shape and...
7078899 Pareto-optimal magnetic resonance data acquisition  
A magnetic resonance data acquisition method includes designating a plurality of parameters that are representative of conditions for acquiring data from a magnetic resonance apparatus, at least...
7042221 System and method for detecting a narrowband signal  
A system for the detection of narrowband signals in wideband noise that combines information across two frequency channels that straddle the frequency of the target signal. Two band pass filters...
7038453 Method and magnetic resonance tomography apparatus for spatially resolved measurement of the B1 field distribution  
In a method and magnetic resonance tomography apparatus for spatially resolved measurement of the magnetic high frequency field distribution in the apparatus, a double echo high frequency pulse...
7023208 Method of optimizing NMR measurement condition  
There is disclosed a method of finding a reliable optimum value of a measurement condition in an NMR measurement. This method starts with gaining NMR measurement data while varying the value of the...
7019524 Method, system and computer product for k-space correction of gradient non-linearities  
One aspect of the invention is a method for reconstructing a moving table MR image. The method comprises receiving an input array that includes a plurality of uncorrected k-space data points. The...
6975114 Methods for transmit excitation in magnetic resonance imaging using a transmit pulse with time varying spatial characteristics  
A method of inducing spin excitation by employing RF transmission fields of time-varying spatial characteristics in order to better control the overall distribution of spin excitation. The MRI...
6965234 RF pulses with built-in saturation sidebands for MRI applications  
A RF Excitation pulse for MRI applications has built-in saturation sidebands, thereby reducing the time for an excitation sequence. The pulse is created using the Shinnar-Le Roux (SLR) transform...
6956374 Method and apparatus to reduce RF power in high field MR imaging incorporating multi-phase RF pulse flip angles  
A technique is set forth that is designed to reduce RF induced power in high field MR imaging that includes application of an initial contrast preserving phase of RF pulses. These initial RF pulses...
6944937 Method of reducing ESD damage in thin film read heads which enables measurement of gap resistance  
The present invention provides a method of manufacturing a magnetoresistive read head which reduces electrostatic discharge and allows measurement of gap resistances in the head.
6937015 Method for optimizing the k-space trajectories in the location encoding of a magnetic resonance tomography apparatus  
In a method and apparatus for calculating the sampling path of the k-matrix under given boundary conditions for the examination of a subject by means of a magnetic resonance tomography apparatus...
6933720 Sequence preconditioning for ultra-fast magnetic resonance imaging  
An improved magnetic resonance imaging (MRI) methodology uses an abbreviated initial MRI sequence to generate sequence diagnostic parameters. The sequence diagnostic parameters have a fixed...
6900630 Azimuthal NMR imaging of formation properties from a wellbore  
A method and apparatus for performing NMR measurements suppressing contribution to NMR signals from within the borehole. Within the region of examination, the RF magnetic field has a spatially...
6853192 Method for designing a selective RF pulse for use in a magnetic resonance apparatus  
In a method for designing a selective RF pulse for a magnetic resonance apparatus, based on a determination of a first polynomial (A n (z)) and a second polynomial (B n (z)) that are Shinnar-LeRoux...
6850063 Method for measuring the magnetic resonance (NMR) by means of spin echoes  
A nuclear magnetic resonance (NMR) spectroscopy or tomography method wherein a sequence of temporally mutually offset radio frequency (RF) pulses is applied onto a spin ensemble like a CPMG multi...
6836115 Method for high resolution magnetic resonance analysis using magic angle technique  
A method of performing a magnetic resonance analysis of a biological object that includes placing the object in a main magnetic field (that has a static field direction) and in a radio frequency...
6809518 System and method for converting adiabatic RF pulses into pseudo adiabatic RF pulses  
Adiabatic RF pulses are very useful in MRI when precise flip angles are needed. Unfortunately, adiabatic pulses suffer from a long application time and a high SAR. A new concept to modify the usual...
6781375 Magnetic resonance imaging using preparation scan for optimizing pulse sequence  
To optimize in advance a desired image quality determining pulse sequence parameter incorporated in an imaging scan, a preparation scan is adopted. The preparation scan is performed with the amount...
6731112 MRI using 3D gradient and spin echo MRI pulse sequences with cylindrical k-space trajectories at constant frequency of the oscillating gradients  
MR imaging with gradient oscillations that are essentially at the same frequency to reduce off-resonance effects. Frequencies that are sufficiently close to each other to reduce such effects...
6714807 Magnetic resonance imaging system  
A method for performing MRI, including imposing N sets of steady-state free precession (SSFP) sequences on an object to be imaged, the sequences including respective initial radio-frequency (RF)...
6710686 Method for the fast acquisition of a magnetic resonance image  
In a method for the fast acquisition of a magnetic resonance image, magnetic resonance signals from an imaging region are conditioned with magnetic gradient fields that define a spatial frequency...
6700375 MRI method and apparatus using independent gradient magnetic field spolier pulses  
In fast imaging of a multi-echo method represented by a fast spin echo (FSE) method, a pulse sequence is arranged such that a basic condition relating to a CPMG method is satisfied and a spoiler...
6693428 RF coil and magnetic resonance imaging apparatus  
For the purpose of providing an RF coil that prevents a troublesome force from arising when a hanging portion is lifted up, a pair of handhold members 308 is provided along a side that...
6690167 Nuclear magnetic resonance pulse sequence with refocusing pulses having reduced tipping angle  
A method for acquiring nuclear magnetic resonance measurements of a material uses a modified CPMG sequence with a refocusing pulse having a tipping angle less than 180 °. The results of using the...
6680610 Apparatus and method for parallel MR data acquisition and parallel image reconstruction from multiple receiver coil arrays for fast MRI  
An apparatus and method for decreasing image acquisition and reconstruction times in magnetic resonance imaging are provided. Magnetic resonance data is acquired in parallel by an array of separate...
6636038 Method and apparatus for controlling a pulse sequence in a magnetic resonance tomography system  
In a method for the control of the pulse sequence for a nuclear magnetic resonance tomography system and apparatus for the implementation of the method, the calculation of a control dataset is...
6608479 Method and system for MRI with lipid suppression  
A method and system are provided for acquiring images with water and lipid separation using a magnetic resonance imaging (MRI) system comprising applying a plurality of steady-state free precession...
Matches 1 - 50 out of 207 1 2 3 4 5 >