Patent application number | Description | Published |
20080234557 | Mobile radio transmission unit - The invention relates to a mobile radio transmission unit for transferring data to a control and/or signal processing unit. According to the invention, provision is made for a mobile radio transmission unit for transferring data to a control or a signal processing unit, comprising a sensor arrangement for determining at least one component of a surrounding magnetic field. The sensor arrangement is connected to a monitoring entity which, from the at least one component, ascertains a variable that characterizes the surrounding magnetic field and prevents a transmission by an antenna of the radio transmission unit if the characteristic variable is below a threshold value. | 09-25-2008 |
20090088654 | EKG measurement device - The invention relates to an EKG measurement device. The EKG measurement device comprises a number of EKG electrodes and a common-mode measurement unit connected on its input side to the EKG electrodes. Inventively an EKG trigger unit is connected on its input side to the EKG electrodes and to the common-mode measurement unit. | 04-02-2009 |
20090096546 | MODULATOR FOR RADIO-FREQUENCY SIGNALS - A modulator for radio-frequency signals designed an entirely digital modulator has two mixer stages connected in series. The first mixer stage implements with a relatively low first sample rate a frequency mixing with a first oscillator frequency that is adjustable with high precision. The second mixer stage implements a frequency mixing with a significantly higher second sample rate and with a relatively coarsely adjustable second oscillator frequency. The downstream second mixer stage, in the case of a single mixer stage, the mixer stage, has at least two phase accumulators that are incremented with the higher second sample rate but with different incremental values. The output signal of at maximum one of the phase accumulators is evaluated at any point in time. | 04-16-2009 |
20090137898 | ARRANGEMENT TO TRANSMIT DIGITAL SIGNALS IN A MAGNETIC RESONANCE APPARATUS - An arrangement for transmission of digital signals in a magnetic resonance apparatus has a local coil that has reception antenna connected via an amplifier with an A/D converter so that a magnetic resonance signal received via the individual antenna is amplified as an analog signal and is converted into a digital signal. The A/D converter is connected at the output with a transmission device that is designed for capacitive coupling transmission of the digital signal. | 05-28-2009 |
20090251141 | MAGNETIC RESONANCE SYSTEM AND OPERATING METHOD THEREFOR - A magnetic resonance system has a number of components including a basic magnetic field generation unit, gradient coils as well as a radio-frequency coil arrangement. The components are respectively controllable according to a control sequence via at least one digital module and at least one analog module. The analog modules are arranged external to a control computer that controls the digital modules. The digital modules are likewise arranged external to the control computer and are associated with the analog module or modules controlled via the control computer. The digital modules are networked via the following networks for communication of the digital modules among one another and/or with the control computer: a synchronous first network to synchronize the digital modules, an isochronous or semi-isochronous second network, a third network, wherein the digital modules are connected with the control computer via serial peripheral component interfaces and a signal transmission between the peripheral component interface of the respective digital module and the associated peripheral component interface of the control computer thereby occurs on optical paths. | 10-08-2009 |
20090270715 | Correction method and magnetic resonance device - The invention relates to a correction method for correcting interference due to gradient injections in ECG signal data records recorded in a magnetic resonance device by an ECG measuring device. A first correction data record is determined with the ECG measuring device located in a first position. A second correction data record is determined by the ECG measuring device located in a second position. An ECG signal data record is measured by the ECG measuring device located in a defined position. A modified correction data record is defined as a function of the first correction data record and the second correction data record and the first and second position and the defined position of the ECG measuring device. The ECG signal data record is corrected based on the modified correction data record. | 10-29-2009 |
20090270716 | Correction method and magnetic resonance device - The invention relates to a correction method for correction of noise resulting from gradient artifacts in ECG signal data records recorded in a magnetic resonance device by an ECG measuring apparatus. A first correction data record is determined with a reference point of the ECG measuring apparatus located at a first position in the magnetic resonance device. An ECG signal data record is measured with the reference point of the ECG measuring apparatus located at a second position in the magnetic resonance device. A modified correction data record is specified as a function of the first correction data record and the first and second position of the reference point. The ECG signal data record is corrected based on the modified correction data record. | 10-29-2009 |
20090287104 | Method and Monitoring Device for Monitoring a Contacting of Electrodes of an ECG Measuring Device - A method for monitoring a contacting of electrodes of an ECG measuring devices is provided. At least three signals each from a first and a second input signal are generated. The first and the second input signal emanate from different electrodes and each electrode supplies one of the input signals to at least two of the signals generated by a first signal processing unit. The three signals are compared with a reference value. Inadequately contacted electrodes are identified based on the comparisons and are displayed. A monitoring device for implementing the method is provided. The monitoring device comprises a first signal processing unit connected to the electrodes at an input side, a second signal processing unit for identifying the inadequately contacted electrodes by receiving and processing at least three signals generated by the first signal processing unit, and a display unit for displaying the inadequately contacted electrodes. | 11-19-2009 |
20090318821 | Method for Checking ECG Signals and ECG Measuring Device - The invention relates to a method for checking ECG signals measured by an ECG measuring device having at least three electrodes for the presence of interference errors. At least three voltages are measured on a closed circulation path across the electrodes of the ECG measuring device. A monitoring value is calculated from the three measured voltages. A presence of an error is checked by determining a deviation of the monitoring value from a reference value. An error signal is outputted if an error is presented. The ECG measuring device has a further processing unit for processing voltage signals between a different pair of electrodes and a monitoring unit for calculating the monitoring value. | 12-24-2009 |
20090319192 | Measurement Facility, Sensor Unit and Further Processing Unit - A measurement facility comprises at least one sensor unit for measurement and issuing of signals and a further processing unit for receiving and further processing of signals which were measured by the at least one sensor unit, with an interface for detachable connection of the further processing unit to different sensor units. A further processing unit comprises at least one interface for establishing a detachable connection to a sensor unit, in order to form a usable inventive measurement facility. A sensor unit comprises a connection point for establishing the detachable connection to the further processing unit. | 12-24-2009 |
20100134198 | METHOD FOR THE PRODUCTION OF A DIGITALLY MODULATED HIGH-FREQUENCY SIGNAL - In a method for the production of a radio-frequency signal modulated as a function of a low-frequency digital data stream, a clock signal is provided having a frequency that is at least four times as high as the frequency of the radio-frequency signal to be produced. The clock signal is used for mixing the low-frequency data stream with a cyclical numeric sequence representing a continuous sinusoidal or co-sinusoidal series. A circuit arrangement implements such a method to produce a radio-frequency signal modulated as a function of a low-frequency digital data stream, and a magnetic resonance tomography system employs such a circuit arrangement. | 06-03-2010 |
20110040997 | SYNCHRONIZATION OF CLOCKS IN AUTONOMOUS COMPONENTS OF AN MR SYSTEM AND SYNCHRONOUS EXECUTION OF COMMANDS IN THOSE COMPONENTS - In a device and a method to execute commands in components of an imaging system, in particular of a magnetic resonance tomography system, local clocks in the components are temporally synchronized, commands, including a respective command execution time specification which respectively specifies at which point in time a command should be executed, are sent to the components, the commands are received by the components, commands and command execution time specifications that are received by components are stored in these components, and a stored command is respectively executed when a time indicated by the local clock coincides with the stored command execution time specification regarding the command. | 02-17-2011 |
20110050224 | PREALLOCATABLE TRANSMISSION DATA MEMORY ELEMENT OF AN MR TRANSMISSION UNIT IN ARRAY APPLICATIONS - Optimized transmission system for an MRT is achieved by a device and a method to generate transmission signals ( | 03-03-2011 |
20120075126 | EMI REDUCTION WITH SPECIFIC CODING OF COUNTER SIGNALS - Apparatuses and a method for transmitting a counter signal in an imaging system are provided. Counter states of the counter signal are Gray coded to Gray coded counter states before transmission. Every second Gray coded counter state is inverted to an inverted counter state. The Gray coded counter states inverted in every second counter state are transmitted and are decoded on receipt. | 03-29-2012 |
20130200898 | Digital Amplitude Control and Digital Phase Control of a High-Frequency Signal - A method for digital amplitude control and digital phase control of a high-frequency signal is provided. A digital command signal specifies in complex form, including a real subcomponent and an imaginary subcomponent, an amplitude and a phase of the high-frequency signal that is to be controlled. A digital activation signal is output to a high-frequency unit for the purpose of generating the high-frequency signal. A digital signal deviation value is received in complex form including a real subcomponent and an imaginary subcomponent. The signal deviation value expresses a deviation of the high-frequency signal from the command signal with respect to the amplitude and the phase. The digital activation signal is determined from the command signal while taking into consideration the signal deviation value. The determination of the real subcomponent and the imaginary subcomponent takes place separately in each case. | 08-08-2013 |
20130229180 | 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 envelope for the high frequency pulses that are to be emitted is received. A digital control signal is transmitted to a high frequency unit for generating high frequency pulses, depending on the instruction signal. A test signal that allows notification of a current overload situation is received. The current control signal is reduced if the test signal indicates an overload situation. | 09-05-2013 |
20140028481 | EMI Reduction with Specific Coding of Counter Signals - Apparatuses and a method for transmitting a counter signal in an imaging system are provided. Counter states of the counter signal are Gray coded to Gray coded counter states before transmission. Every second Gray coded counter state is inverted to an inverted counter state. The Gray coded counter states inverted in every second counter state are transmitted and are decoded on receipt. | 01-30-2014 |
20140077804 | Methods for Truncation Error Minimization in an MRI Device - Devices and methods for the truncation of signal data in a system of a magnetic resonance imaging (MRI) device are provided. A device includes a demodulator that provides multiple truncation of signal data on a route between an input and an output of a system for the respective reduction of a bit width of signal data. Signal data to be truncated is inverted in each case before or after a truncation in only a part of the multiple truncations. | 03-20-2014 |
20140337397 | Generating a Signal - A method for generating a signal for a transmission antenna in a magnetic resonance imaging system includes generating a real part and an imaginary part of a baseband signal, generating a real part and an imaginary part of variations in frequency and in phase, and performing a complex multiplication of the baseband signal with the variations in frequency and in phase and a radiofrequency carrier signal for modulation. The method also includes modifying the modulated signal, and may include establishing a characteristic angle for a phase shift of the modified signal, and correcting the modulation based on the established angle in a closed-loop control. | 11-13-2014 |