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US20130200893 Determination of a Measuring Sequence for a Magnetic Resonance System  
A method and a measuring-sequence-determining device for determining a measuring sequence for a magnetic resonance system based on at least one intra-repetition-interval time parameter are...
US20110267056 DIGITAL WAVEFORM SYNTHESIZER FOR NMR PHASE CONTROL  
In an RF source, a digital waveform synthesizer comprises a computational module to synchronously determine a desired periodic function, f(θ), within a first bandwidth portion, to which...
US20130271138 Method for NMR Measurements on Quadrupolar Nuclei  
A method is offered which permits NMR measurements of integer spin nuclei to be performed at higher sensitivity than heretofore. In particular, the method enables high-resolution multidimensional...
US20150204959 OPTIMIZATION OF A MAGNETIC RESONANCE SEQUENCE OF A MAGNETIC RESONANCE APPARATUS  
In a method to optimize a magnetic resonance sequence of a magnetic resonance apparatus, a method to operate a magnetic resonance apparatus, and a sequence optimization unit, and a magnetic...
US20150253395 Signaling a Tuning of Adjustment Parameters of a Coil Arrangement  
A method for signaling a tuning of an adjustment parameter of an antenna coil arrangement of a magnetic resonance tomograph includes detecting a deviation between an actual adjustment value of at...
US20090256570 Method For Joint Sparsity-Enforced K-Space Trajectory and Radiofrequency Pulse Design  
A system and method is provided for simultaneously designing a radiofrequency (“RF”) pulse waveform and a magnetic field gradient waveform in a magnetic resonance imaging (“MRI”) system. The...
US20130307539 MAGNETIC RESONANCE SYSTEM AND METHOD TO CONTINUOUSLY CORRECT PHASE ERRORS OF A MAGNETIC RESONANCE MEASUREMENT SEQUENCE  
In a method and magnetic resonance apparatus to continuously correct phase errors in a magnetic resonance measurement sequence in which multiple sequentially radiated, multidimensional,...
US20130221965 B1 Field-Based Regulation Within a Sequence for NMR  
A B1 magnetic field may be regulated during a magnetic resonance tomography (MRT) imaging sequence.
US20140232396 OPTIMIZATION OF A PULSE SEQUENCE FOR A MAGNETIC RESONANCE SYSTEM  
In a method and a pulse sequence optimization device to determine a pulse sequence for a magnetic resonance system, a pulse sequence is selected for optimization that includes a number of...
US20100308829 METHOD AND SYSTEM FOR MODIFYING PULSE SEQUENCES  
Methods and systems are provided for modifying a pulse sequence. In one embodiment, a determination is made whether an estimated peripheral nerve stimulation (PNS) associated with a pulse sequence...
US20130127465 APPARATUS AND METHOD FOR SYNCHRONIZING CLOCKS BETWEEN DEVICES OF MAGNETIC RESONANCE IMAGING (MRI) SYSTEM  
A method of synchronizing clocks between a central controlling unit and a radio frequency (RF) coil which are wirelessly connected to each other in a magnetic resonance imaging (MRI) system, which...
US20130271137 Magnetic Resonance Trajectory Correcting  
Apparatus, methods, and other embodiments associated with magnetic resonance (MR) trajectory correcting using GRAPPA operator gridding (GROG) are described. One example method includes identifying...
US20080191695 Mri System Comprising a Scan Room Inferface for A/D-Conversion of Mr Signals Between a Receiver Coil Unit and a Remote Signal Processing Unit  
The present invention relates to a magnetic resonance imaging system, to a magnetic resonance imaging method for operating a magnetic resonance imaging system and to a computer program for...
US20130285660 Controlling a Magnetic Resonance System  
A method for controlling a magnetic resonance system is provided. The magnetic resonance system includes a plurality of radio-frequency transmit channels via which, in operation, parallel RF pulse...
US20140232397 DETERMINATION OF A PULSE SEQUENCE FOR A MAGNETIC RESONANCE SYSTEM  
In a method and a pulse sequence determination device to determine a pulse sequence for a magnetic resonance system, control protocol parameter values are initially acquired. A determination of...
US20150168516 Spatial Homogenization of the Field Strength of Radiofrequency Pulses  
The embodiments relate to a method and a device for spatial homogenization of the field strength of voltages of radiofrequency pulses of a number of RF transmitters, wherein (a) the measured...
US20130154645 MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD  
According to one embodiment, a magnetic resonance imaging apparatus includes an imaging condition setting unit and an imaging unit. The imaging condition setting unit is configured to display a...
US20130307538 MAGNETIC RESONANCE SYSTEM AND METHOD TO CONTINUOUSLY CORRECT PHASE ERRORS OF A MAGNETIC RESONANCE MEASUREMENT SEQUENCE  
In a method and magnetic resonance system to correct phase errors in multidimensional, spatially selective radio-frequency excitation pulses in a pulse sequence used to operate the system to...
US20120074941 METHOD FOR SUPPRESSING AND/OR ELIMINATING NOISE SIGNALS IN MAGNETIC RESONANCE IMAGING AND A MAGNETIC RESONANCE APPARATUS THEREFOR  
A method is disclosed for suppressing and/or eliminating noise signals during magnetic resonance imaging by way of a magnetic resonance sequence including an ultra-short echo time. In at least one...
US20110304333 Means And Methods For Providing High Resolution MRI  
Means and methods for improving the MRI “image quality in an MRI imaging” apparatus comprising a non-super-conducting electromagnet and a plurality of pole pieces are provided. Said means for...
US20150219733 RF Pulse Alignment  
An RF pulse alignment method for determining transmit scaling factors used in the control of a magnetic resonance system having a number of radiofrequency transmit channels, via which RF pulse...
US20090256569 MULTI-FREQUENCY RF COIL  
A multi-frequency imaging radio frequency (RF) coil operational at three or more different frequencies, with a shifting frequency loop structure proximate the coil and switchably coupled to...
US20120153952 METHOD AND SYSTEM FOR GRADIENT LINEAR CORRECTION  
Methods, systems and computer program products are described for providing gradient linearity correction in a magnetic resonance image. The method in one example obtains, using a simulation, a...
US20130271139 DETERMINATION OF A CONTROL SEQUENCE FOR A MAGNETIC RESONANCE IMAGING SYSTEM  
In a method to determine a control sequence for a magnetic resonance imaging system in order to acquire echo signal-based raw magnetic resonance data in k-space along one or more trajectories on...
US20120043965 MAGNETIC RESONANCE IMAGING SYSTEM AND METHOD EMBODYING A MAGNETIC RESONANCE MARKING SYSTEM AND METHOD  
In a magnetic resonance marking system marking a flowing medium in a marking region, as well as in a magnetic resonance system with such a magnetic resonance marking system, a method to control a...
US20100237867 Arrangements and Method for Shimming a Magnetic Field  
A shim arrangement for increasing the homogeneity of a magnetic field within a homogeneous field region, comprising: shim channels extending within a volume between a magnetic field generator and...
US20130257430 Controlling Magnetic Resonance Systems  
Methods for controlling magnetic resonance systems having a plurality of high frequency transmission channels through which HF pulse trains are emitted in parallel during operation are described....
US20130241553 METHOD OF CHARACTERIZING  
The invention relates to a method of characterizing the RF transmit chain of a magnetic resonance imaging scanner (1) using a local transmit/receive coil system (204; 210), comprising a first...
US20130134976 MAGNETIC RESONANCE IMAGING APPARATUS  
A magnetic resonance imaging apparatus according to embodiments includes an executing unit, an informing unit, a detecting unit, and a determining unit. The executing unit executes a pulse...
US20100207630 PASSIVE SHIMMING OF MAGNET SYSTEMS  
In a method and an arrangement for shimming a cylindrical magnet system, that has a cylindrical magnet having a bore therein with an axis extending therethrough, and a gradient coil assembly...
US20130214784 Method for Operating a Coil and a Monitoring Module  
A method for operating a coil, through which a varying current flows, is provided. Mechanical resonance responses of the coil are recorded and are modeled by an electrical resonant circuit model....
US20120262175 SYSTEM AND METHOD OF HIGH SIGNAL-TO-NOISE RATIO MAGNETIC RESONANCE IMAGING SCREENING  
An MRI apparatus is disclosed, the MRI apparatus comprising a computer programmed to apply a fluid suppression technique prior to an imaging pulse-gradient sequence, wherein the fluid suppression...
US20130181713 CONTROLLING GRADIENT COILS TAKING THE INDUCTIVE COUPLING INTO ACCOUNT  
A gradient pulse generator generates reference current signals for a plurality of gradient coils of a gradient coil system of a magnetic resonance system and supplies each of the reference current...
US20100019766 System for Dynamically Compensating for Inhomogeneity in an MR Imaging Device Magnetic Field  
A system automatically dynamically compensates for inhomogeneity in an MR imaging device magnetic field. An MR imaging compensation system applies swept frequency magnetic field variation in...
US20130320980 PULSE GAP CYCLING FOR IMPROVED SWIFT  
A magnetic resonance image is produced by shifting a gap during acquisition of spin data for a specimen. The spin data is generated by a gapped excitation sequence.
US20130285659 System and Method for Control of RF Circuits for Use With an MRI System  
A system and method for automatically adjusting electrical performance of a radio frequency (RF) coil assembly of a magnetic resonance imaging (MRI) system during a medical imaging process of a...
US20110267057 DYNAMIC FREQUENCY DRIFT CORRECTION METHOD IN MAGNETIC RESONANCE IMAGING  
For magnetic resonance imaging (MRI), a dynamic frequency drift correction method for binomial water excitation method includes collecting the reference one-dimensional navigation signal by an MRI...
US20140292327 Magnetic Resonance Imaging With Switched-Mode Current-Source Amplifier Having Gallium Nitride Field Effect Transistors For Parallel Transmission in MRI  
Example systems, apparatus, circuits, and other embodiments described herein concern parallel transmission in MRI. One example apparatus includes at least two enhanced mode gallium nitride (eGaN)...
US20130229180 Emission of High Frequency Pulses in a Magnetic Resonance Tomography System  
A method for emitting a sequence of high frequency pulses that may have different envelopes in a magnetic resonance tomography system is provided. A digital instruction signal that specifies the...
US20130088231 MAGNETIC RESONANCE SYSTEM AND METHOD FOR FREQUENCY CALIBRATIONN OF THE MAGNETIC RESONANCE SYSTEM  
In a method for frequency calibration in a magnetic resonance system in a volume section containing an unknown number of determined substances, the predetermined volume section is excited with RF...
US20150123660 AUTO-TUNE-AND-MATCH COILS FOR HUMAN WHOLE-BODY IMAGING AND METHOD  
A progressive series of five new coils is described. The first coil solves problems of transmit-field inefficiency and inhomogeneity for heart and body imaging, with a close-fitting, 16-channel...
US20100201363 CALIBRATING PARALLEL MRI WITH CARTESIAN CONTINUOUS SAMPLING  
Example systems, methods, and apparatus control a pMRI apparatus to produce a pulse sequence having an extended acquisition window, and overlapping phase-encoding gradients and read gradients. One...
US20150234025 METHOD AND MAGNETIC RESONANCE APPARATUS FOR DETERMINATION OF RADIO-FREQUENCY PULSES  
In a method and magnetic resonance apparatus for determination of radio-frequency pulses, a time-parallel transmission of a radio-frequency pulse influences the transverse magnetization of an...
US20140152309 METHODS OF PREPARING AND OPERATING AN MRI MULTI-CHANNEL COIL  
A method of preparing a multi-channel coil, in particular for magnetic resonance imaging (MRI) or for a medical treatment device, wherein the multi-channel coil comprises at least two coil rows...
US20100271025 Device for highly precise synchronization of the NMR transmission frequency to the resonance frequency of an NMR line while taking into consideration a non-constant RF phase  
A device that comprises an RF generator (29), an NMR transmission (20) and reception system (21) and a first control loop (28), with which the frequency fRF of the RF generator is synchronized...
US20090273346 APPARATUS AND METHOD FOR OPTIMIZING THE SPECTRA OF PARALLEL EXCITATION PULSES  
An MRI apparatus includes a magnetic resonance imaging (MRI) system having a magnet to impress a polarizing magnetic field, a plurality of gradient coils positioned about the bore of the magnet to...
US20140176135 Multiturn MRI Coils In Combination With Current Mode Class D Amplifiers  
Example systems, apparatus, and circuits described herein concern a multi-turn transmit surface coil used in parallel transmission in high field MRI. One example apparatus includes a balun network...
US20100141257 RF TRANSMITTER WITH DIGITAL FEEDBACK FOR MRI  
A method and an RF transmit system for generating RF transmit signals for feeding an RF transmitter (14) in the form of, or comprising, one or more antenna device(s), coil(s), coil elements, or...
US20100194391 COMPENSATION DEVICE TO REDUCE THE ELECTROMAGNETIC FIELD LOAD DUE TO A MEDICAL INTERVENTION APPARATUS IN MAGNETIC RESONANCE EXAMINATIONS  
A compensation device to reduce the electromagnetic field load due to the presence of a medical intervention apparatus in magnetic resonance examinations, has: a control device that has a...
US20130187653 ACTIVATION OF FIELD COILS OF A MAGNETIC RESONANCE SYSTEM HAVING EDDY CURRENT COMPENSATION  
A controller of a magnetic resonance system determines an activation signal vector based on a target field predetermined for the controller in conjunction with field characteristics of field coils...

Matches 1 - 50 out of 69 1 2 >