Patent application number | Description | Published |
20080204021 | Flexible and Wearable Radio Frequency Coil Garments for Magnetic Resonance Imaging - A radio frequency apparatus for at least one of (i) receiving and (ii) exciting a magnetic resonance signal includes an item of clothing ( | 08-28-2008 |
20080211501 | Method and Curcuit Arrangement For Operating Multi-Channel Transmit/Receive Antenna Devices - Methods and circuit arrangements for operating multi-channel transmit/receive antenna devices or arrangements especially for use in magnetic resonance imaging (MRI) systems are disclosed, by which a fully independent control of complete multi-channel RF transmit and receive chains can be conducted in a flexible way and new options like RF shimming, transmit sensitivity encoding (TransmitSENSE), RF encoding, determination of S- or Z-matrix prior to spin echo measurements, calibration, SAR (specific absorption rate) reduction etc. can be utilized or improved. | 09-04-2008 |
20080258728 | Active Decoupling of Transmitters in Mri - A magnetic resonance imaging system includes a coupling compensation processor ( | 10-23-2008 |
20080265890 | Simultaneous Mr-Excitation of Multiple Nuclei with a Single Rf Amplifier - A medical imaging system ( | 10-30-2008 |
20090128153 | METHOD AND CIRCUIT ARRANGEMENT FOR OPERATING MULTI-CHANNEL TRANSMIT/RECEIVE ANTENNA DEVICES - Methods and circuit arrangements for operating a multi-channel transmit/receive antenna device or arrangement, especially for use in a magnetic resonance imaging (MRI) system, are disclosed by which RF amplifiers can be used to their full peak power capability without running the risk that the RF amplifier is damaged due to excessive reflected power at its output. Furthermore by evaluating certain forward and reflected power signals patient safety is achieved with respect to monitoring the limits of the specific absorption rate. | 05-21-2009 |
20100141257 | RF TRANSMITTER WITH DIGITAL FEEDBACK FOR MRI - A method and an RF transmit system for generating RF transmit signals for feeding an RF transmitter ( | 06-10-2010 |
20100141259 | METHOD AND RF TRANSMITTER ARRANGEMENT FOR GENERATING RF FIELDS - A multi-channel RF transmitter arrangement comprising a plurality of RF transmitter elements (e) like RF antennas, antenna elements, coils or coil elements, for generating an RF field, especially for use in a magnetic resonance imaging (MRI) system for exciting nuclear magnetic resonances (NMR), and a method for generating such an RF field is disclosed. The RF transmitter elements (e) are segmented in a plurality of segments (s | 06-10-2010 |
20110156704 | B1-MAPPING AND B1L-SHIMMING FOR MRI - The invention relates to a method of acquiring MRI image data comprising the following steps: performing a 3-dimensional B1 mapping of a first volume using a first voxel size, selecting an MRI protocol, performing the B1-shim in accordance with the MRI protocol, performing the MRI protocol to acquire MRI imaging data of a second volume using a second voxel size, wherein the first voxel size is larger than the second voxel size, wherein the first volume is larger than the second volume, and wherein the second volume is contained within the first volume. | 06-30-2011 |
20120019247 | SAR REDUCTION IN PARALLEL TRANSMISSION BY K-SPACE DEPENDENT RF PULSE SELECTION - When generating an MR image using a multi-channel transmit coil arrangement, SAR is reduced by employing a number of different RF pulses in a single scan. Each RF pulse exhibits a different performance and/or accuracy, resulting in different RF pulse-specific SAR values. As a result, the RF pulses differ slightly in actual excitation pattern, B1 waveform and/or k-space trajectory, etc. The average SAR over a single scan is thus reduced compared to a fixed RF pulse, without compromising image quality. | 01-26-2012 |
20120086449 | MAGNETIC RESONANCE SYSTEM AND METHOD FOR COMPREHENSIVE IMPLANTABLE DEVICE SAFETY TESTS AND PATIENT SAFETY MONITORING - A magnetic resonance method comprises: performing (C | 04-12-2012 |
20120169333 | MOTION MONITORING SYSTEM FOR MONITORING MOTION WITHIN A REGION OF INTEREST - The invention relates to a motion monitoring system ( | 07-05-2012 |
20130241553 | METHOD OF CHARACTERIZING - The invention relates to a method of characterizing the RF transmit chain of a magnetic resonance imaging scanner ( | 09-19-2013 |
20140210472 | REDUCING THE RADIO-FREQUENCY TRANSMIT FIELD IN A PREDETERMINED VOLUME DURING MAGNETIC RESONANCE IMAGING - Embodiments of the invention relate to a magnetic resonance imaging system ( | 07-31-2014 |