Patent application number | Description | Published |
20090096455 | ARRANGEMENT TO TRANSMIT MAGNETIC RESONANCE SIGNALS - An arrangement to transmit magnetic resonance signals has at least two reception branches. Each reception branch contains a single antenna of a local coil as well as an amplifier connected with the single antenna, such that an amplified magnetic resonance signal is formed from a magnetic resonance signal that is acquired via the single antenna. In a multiplexer, each input is connected with a respective reception branch, such that the amplified magnetic resonance signals of the reception branch are combined by the multiplexer into a resulting signal using a time multiplexing method. A transmission path is connected on one side with an output of the multiplexer and on the other side with a receiver, such that the resulting signal is transmitted from the multiplexer to the receiver via the transmission path. | 04-16-2009 |
20090096456 | ARRANGEMENT FOR TRANSMISSION OF MAGNETIC RESONANCE SIGNALS - An arrangement to transmit magnetic resonance signals has a local coil composed of a number of individual antennas for acquisition of radio-frequency signals of a magnetic resonance examination. Preamplifiers amplify the radio-frequency signals, and a transmission device transmits the radio-frequency signals from the local coil to the preamplifiers. The transmission device is fashioned as a readout coil and has a number of individual antennas. The individual antennas of the readout coil are magnetically coupled with the individual antennas of the local coil, with the individual antennas of the local coil and the individual antennas of the readout coil forming a linear MIMO transmission system describable by a transmission matrix. | 04-16-2009 |
20090237081 | ARRANGEMENT TO DETUNE A RECEPTION ANTENNA IN A LOCAL COIL - An arrangement to detune a reception antenna in a local coil of a magnetic resonance system, with at least one reception antenna that is fashioned as a loop antenna and that has at least one first capacitance. Radio-frequency signals of a magnetic resonance examination are received via the reception antenna. A switchable detuning circuit contains the first capacitance connected to an oscillating circuit and a first inductance. A reception device to receive a control signal is coupled with the oscillating circuit. The reception device switches the oscillating circuit into a high-resistance state given a received control signal so that a receipt of a radio-frequency signal via the reception antenna is prevented. The reception device is fashioned to receive a wirelessly transmitted radio-frequency control signal. The radio-frequency control signal has a frequency that lies outside of the bandwidth of the radio-frequency signal used for magnetic resonance examination. | 09-24-2009 |
20090286478 | ARRANGEMENT TO TRANSMIT MAGNETIC RESONANCE SIGNALS - An arrangement for transmitting magnetic resonance signals, with a transmission link that connects a local coil with a receiver, has a first channel of the local coil with a first single antenna to acquire a first magnetic resonance signal, as well as a first mixer connected with the first single antenna. The first mixer forms an intermediate-frequency first signal from the supplied first magnetic resonance signal. A second channel of the local coil has a second single antenna to acquire a second magnetic resonance signal, as well as a second mixer connected with the second single antenna. The second mixer forms an intermediate-frequency second signal from the supplied second magnetic resonance signal. The local coil has a device for signal combination that, by frequency multiplexing, that combines the intermediate-frequency first signal of the first channel and the intermediate-frequency second signal of the second channel so that it arrives at the receiver via the transmission path. The receiver has an A/D converter at which one of the transmitted intermediate-frequency signals of an associated channel arrives in order to be sampled with a sampling frequency for digitization. For frequency conversion, a first local oscillator frequency is connected at the first mixer and a second local oscillator frequency is connected at the second mixer. the first and second local oscillator frequencies are selected such that intermediate-frequencies formed by the frequency conversion are mirror-symmetrical relative to the sampling frequency of the A/D converter. | 11-19-2009 |
20100121180 | HEAD COIL FOR A MAGNETIC RESONANCE DEVICE - A head coil for a magnetic resonance apparatus has a supporting body that carries a number of antenna elements. The supporting body has an end section that is shaped as a spherical cap. A butterfly antenna is mounted at the end section, and is annularly surrounded by at least one group antenna that overlaps the butterfly antenna. | 05-13-2010 |
20100148778 | MAGNETIC RESONANCE ACQUISITION SYSTEM, RECEIVER ANTENNA MODULE, TRANSMISSION SIGNAL RECEPTION MODULE, MAGNETIC RESONANCE SYSTEM AND METHOD TO TRANSFER MR RESPONSE SIGNALS - A magnetic resonance receiver system has an antenna arrangement with a number of receiver antenna elements to receive MR response signals. The magnetic resonance system has a combination network arrangement with a number of combination networks in order to combine the MR response signals received by various receiver antenna elements, to form modes, a frequency multiplexer arrangement downstream of the combination network that superimposes at least some of the modes in a common transmission signal, and a transmission line arrangement with a number of transmission lines in order to respectively transfer the transmission signals to an input channel of a first channel switching matrix. This input channel is associated with the transmission line. Downstream of the first channel switching matrix is a frequency demultiplexer arrangement that filters the modes superimposed in a transmission signal out of the transmission signal. Downstream of the frequency demultiplexer arrangement is a second channel switching matrix that connects the modes at specific inputs of an MR signal processing device. | 06-17-2010 |
20100176800 | COIL POSITION DETECTION - A simple position determination is enabled by a device and a method to determine the position of a local coil in a magnetic resonance apparatus, wherein at least one signal emitted by at least one transmission coil is received by the local coil and is evaluated with a position determination device in order to determine the position of the local coil. | 07-15-2010 |
20100176809 | MAGNETIC RESONANCE TOMOGRAPHY DEVICE WITH LOCALIZATION SYSTEM AND METHOD TO LOCALIZE A LOCAL COIL - A magnetic resonance tomography device has a magnet system that generates a gradient field; with a local coil that receives a magnetic resonance signal; and with a localization system that is fashioned to locate the local coil. The localization system has a number of magnetic field sensors that are integrated with the local coil and fashioned to detect the gradient field. Such a device is used in a corresponding method for localization of a local coil in a magnetic resonance tomography device, and a local coil is fashioned so as to be suitable for this purpose. | 07-15-2010 |
20100182005 | MAGNETIC RESONANCE TOMOGRAPHY APPARATUS WITH A LOCAL COIL AND METHOD TO DETECT THE POSITION OF THE LOCAL COIL - A magnetic resonance tomography device has a local coil that is fashioned to receive a magnetic resonance signal. This device has a detector system that is fashioned to detect a position of the local coil on the basis of electromagnetic waves that are affected by the position of the local coil and can be differentiated from the magnetic resonance signal. A method to detect a position of a local coil in a magnetic resonance tomography device Is implemented in this manner as well. | 07-22-2010 |
20100271027 | ADAPTER TO CONNECT A LOCAL COIL IN A MAGNETIC RESONANCE SYSTEM - A simple connection of a coil with a magnetic resonance tomography (MRT) is facilitated by a method and an adapter wherein a coil-connection element of at least one local coil is connected with an MRT-connection element of an MRT system. The adapter has a coil-connection element adapter designed to form a connection with at least one coil-connection element of at least one local coil. The adapter also has at least one MRT-connection element adapter designed to form a connection with an MRT-connection element of an MRT system. The adapter can be fixed mechanically to a fixing element of the MRT system. | 10-28-2010 |
20110234229 | MAGNETIC RESONANCE SYSTEM - A magnetic resonance system includes at least one coil and at least one coaxial line connecting the at least one coil to an electronic receive system. The at least one coil includes a preprocessing device that converts the received signals to at least one transmission frequency that is different from a transmit frequency. The coaxial line includes at least one sheath wave barrier with a trap suppressing sheath waves of transmit frequency both on the outside and the inside of a sheath conductor of the coaxial line. | 09-29-2011 |
20120313645 | LOCAL COIL SYSTEM, TRANSMITTING DEVICE, MAGNETIC RESONANCE SYSTEM AND METHOD FOR THE WIRELESS TRANSFER OF ENERGY TO A LOCAL COIL SYSTEM - A local coil system for a magnetic resonance system including at least one local coil for capturing magnetic resonance (MR) signals and at least one energy receiving antenna for inductively receiving energy for the local coil system from a temporally varying magnetic field is provided. The at least one energy receiving antenna is or may be tuned to an energy transfer frequency that is lower than a Larmor frequency of the MR signals to be captured and higher than approximately 20 kHz. | 12-13-2012 |
20120323113 | LOCAL SHIM COIL WITHIN A LOCAL COIL FOR LOCAL B0 HOMOGENIZATION IN AN MRT EXAMINATION - A local coil for an imaging system, in particular an MRI scanner. The local coil is an MRI scanner local coil within which the head of a patient may be positioned, and that includes at least one shim coil. | 12-20-2012 |
20130063221 | ARRANGEMENT FOR PROCESSING A NON-SYMMETRICAL AND A SYMMETRICAL SIGNAL - An arrangement for processing a non-symmetrical signal includes an apparatus configured to balance and filter an image frequency of a nominal frequency of the non-symmetrical receiving signal. The apparatus includes a modified Boucherot bridge having a series or parallel oscillating circuit that replaces inductive or capacitive components of a conventional Boucherot bridge, such that the modified Boucherot bridge is in the harmonized state with the image frequency to be faded out and has a predetermined impedance with the nominal frequency on its symmetrical output terminals. The nominal frequency has a predetermined impedance on its symmetrical output terminals. The nominal frequency is transmitted as a signal balanced to ground to the symmetrical output terminals of the modified Boucherot bridge. | 03-14-2013 |
20130097780 | IMAGING DEVICE FOR A JOINT OF A HUMAN - An imaging device for a joint of a human is made of an HF transparent material. The imaging device has a base element that may be fastened to a patient bed of a magnetic resonance system. The imaging device includes a bearing element, in which a joint region of an extremity of the human may be supported when the base element is fastened to the patient bed. The bearing element and the base element are connected movably to each other by a guiding structure such that when the base element is fastened to the patient bed, the bearing element may be positioned in a plurality of defined positions relative to the base element. | 04-25-2013 |
20130106537 | SIGNAL PATH FOR A SMALL SIGNAL OCCURRING IN A MAGNETIC RESONANCE SYSTEM | 05-02-2013 |
20130127468 | Gradient-Independent Shim Coil for a Local Coil of a Magnetic Resonance Device - A shim coil device for installation and/or arrangement within a local coil of a magnetic resonance device is provided. The shim coil device includes at least one shim coil formed by at least one conductor loop, and at least one compensation coil formed by at least one conductor loop. The at least one shim coil and the at least one compensation coil are arranged in a same coil plane. An overall arrangement of the at least one shim coil and the at least one compensation coil is symmetrical about a first central axis and a second central axis. The first central axis and the second central axis are perpendicular to each other and lie in the coil plane. An overall induction surface is enclosed by the at least one conductor loop of the at least one compensation coil corresponding to an overall induction surface enclosed by the at least one conductor loop of the at least one shim coil. | 05-23-2013 |
20130127469 | Local Coil - A local coil for an imaging system includes an anterior torso part and a posterior torso part that are detachably connected to one another with a fastening device. | 05-23-2013 |
20130134978 | Balancing Out a Field Inhomogeneity in a Magnetic Resonance Tomography System and Shim Coil Arrangement - In order to balance out a field inhomogeneity, a value for a coil current is determined by a controller as a function of an item of information relating to the field inhomogeneity and an item of information relating to a position of at least one balancing or shim coil arranged in the magnetic field. The value is to be supplied to the at least one shim coil in order to generate a magnetic balancing field to balance out the field inhomogeneity. A control signal for at least one shim current source and for at least one switching matrix coupling the at least one shim current source to the at least one shim coil is generated as a function of the at least one value. | 05-30-2013 |
20130162253 | SELECTION UNIT FOR A MAGNETIC RESONANCE IMAGING SYSTEM - A selection unit for a magnetic resonance imaging system may be provided. The selection unit electrically connects a first number of electrical terminals to a second number of communication entities. The selection unit is arranged in and/or on a mobile object-support element for moving an examination object which is to be depicted by the magnetic resonance imaging system into a recording position. | 06-27-2013 |
20130165768 | Breast Coil for Magnetic Resonance Recordings of the Breast - A breast coil for a magnetic resonance tomography device for the production of magnetic resonance recordings of female breasts includes a coil housing having a breast recess to accommodate a breast and a number of coil elements. At least one of the coil elements forms an HF correction coil element and has a circuit arrangement to switch over the HF correction coil element between an HF correction mode of operation and another mode of operation. The HF correction coil element is constructed such that in the HF correction mode of operation, the HF correction coil element resonates passively with a B | 06-27-2013 |
20130181715 | MRT Local Coil Position Detection in an MRT System - Magnetic resonance tomography (MRT) local coil positioning by RFID is enabled with a positioning device to detect a position of a first object relative to a position of an additional object that includes at least one RFID tag arranged on the first object and/or at least one RFID reader arranged on the additional object. | 07-18-2013 |
20130190607 | LOCAL COIL AND MANUFACTURE OF MECHANICALLY PREFORMED, FLEXIBLE LOCAL COILS FOR MRI - A method for manufacturing a local coil for a magnetic resonance tomography device includes manufacturing the local coil with a flat cross-section. The method also includes deforming the local coil from the flat cross-section into a curved cross-section. | 07-25-2013 |
20130241547 | MAGNETIC RESONANCE APPARATUS HAVING RECEIVE COILS AND METHOD FOR OPERATING A MAGNETIC RESONANCE APPARATUS - A magnetic resonance apparatus includes receive coils and a receiver device for processing magnetic resonance signals received by coil elements of the receive coils. The receive coils are subdivided into at least a first group having at least one receive coil and a second group having at least one receive coil. The receive coils of the first group are connected to the receiver device via a hardwired communications link, and the receive coils of the second group are each connectable or connected to the receiver device via a wireless communications link. | 09-19-2013 |