Abstract: The disclosure relates to techniques for operating an imaging apparatus, which includes receiving sensor data via a control facility of the imaging apparatus. The sensor data describes sensor values relating to a patient to be examined. The technique further includes determining a state of the patient to be examined by the control facility based on the sensor data, and checking the state of the patient to be examined for fulfillment of a predetermined recording condition for carrying out a recording method by a recording facility of the imaging apparatus. Upon fulfillment of the predetermined recording condition, a recording facility is triggered by the control facility to carry out the recording method, and a recording is performed by the recording facility. The recording method comprises recording at least one recording of a recording area of the patient to be examined.

Abstract: A method for acquiring image data from a part of a human body subjected to a cardiac movement is provided. The method includes transmitting a radiofrequency Tx Pilot Tone signal, receiving a pilot tone signal including a number of channel signals, and carrying out a blind source separation algorithm on a training portion of the pilot tone signal and thereby determining weighting vectors. The method also includes selecting and storing at least two non-parallel weighting vectors that allow to extract signal components from the number of channel signals. The extracted signal components represent cardiac movement. The method includes applying the weighting vectors to the further portions of the pilot tone signal to obtain a multi-dimensional pilot tone signal representing the cardiac movement, and using the multi-dimensional pilot tone signal for triggering the acquisition of the image data.

Abstract: A method for assigning a spatial orientation to a movement signal of a movement of an examination object of a magnetic resonance examination, a magnetic resonance apparatus and a computer program product. According to the method, a first movement signal is captured by means of a first movement capture method. During the capture of the first movement signal, at least one further movement signal is captured by means of at least one further movement capture method. A spatial orientation is assigned to at least one component of the first movement signal by comparing the first movement signal with the at least one further movement signal.

Abstract: A method for detection of a number of pilot tone signals, a magnetic resonance apparatus, and a computer program product are disclosed. The method includes receiving receive signals according to an MR sequence by an RF receive unit of an MR apparatus, wherein the receive signals include an MR signal and the number of PT signals. The number of PT signals each have a different pilot tone frequency. The number of PT signals are received according to the MR sequence in a number of PT receive time segments having a duration of at least tm, interrupted by pauses. The method further includes digitizing the receive signals by sampling with a first sampling frequency f1 and detecting the number of PT signals from the digitized receive signals by sampling the digitized receive signals with a second sampling frequency f2, wherein the second sampling frequency f2?2/tm.

Abstract: A method for calibrating a motion detection method, to a local coil, a magnetic resonance apparatus and a computer program product. The motion detection method is configured for detecting motion of an object under examination during a magnetic resonance measurement by a magnetic resonance apparatus. First motion data of the object under examination is acquired in a capture period in accordance with the motion detection method. In addition, second motion data of the object under examination is acquired in the capture period in accordance with at least one other motion detection method. The motion detection method is calibrated using the first motion data and the second motion data.

Abstract: According to a method for characterizing a motion of an object, a reference signal is emitted into a target region and two or more receiver coil signals are generated in response to the reference signal by two or more receiver coils. A motion signal characterizing a motion of the object is determined by a computing unit depending on temporal modulations of the two or more receiver coil signals. A correlation coefficient of the motion signal and a receiver coil signal is computed by the computing unit. A reference correlation coefficient is determined by the computing unit depending on a location of the receiver coil based on a predetermined reference correlation map. The motion signal is corrected by the computing unit depending on a correlation coefficient and the reference correlation coefficient.

Abstract: A pilot tone signal generator, a magnetic resonance tomograph, a method for transmission of a synchronization signal, and a computer program product are disclosed. The pilot tone signal generator includes a receive unit for receipt of a synchronization signal of a system control unit of a magnetic resonance tomograph. The synchronization signal may include a clock signal, and the pilot tone signal generator is configured to emit a pilot tone signal as a function of the synchronization signal.

Abstract: A computer-implemented method is provided for evaluating a pilot tone signal. In the method, the pilot tone signal is recorded using a high-frequency coil arrangement of a magnetic resonance facility and describes a movement of a patient. The method also includes extracting movement information assigned to a movement component, (e.g., a respiratory movement). A breakdown or decomposition of the pilot tone signal is effected on a basis of signal components having assigned weightings and for the purpose of determining the movement information, a part of a base which is assigned to the movement component is selected by a selection criterion.

Abstract: A pilot tone signal generator, a magnetic resonance tomograph, a method for transmission of a synchronization signal, and a computer program product are disclosed. The pilot tone signal generator includes a receive unit for receipt of a synchronization signal of a system control unit of a magnetic resonance tomograph. The synchronization signal may include a clock signal, and the pilot tone signal generator is configured to emit a pilot tone signal as a function of the synchronization signal.

Abstract: According to a method for characterizing a motion of an object, a reference signal is emitted into a target region and two or more receiver coil signals are generated in response to the reference signal by two or more receiver coils. A motion signal characterizing a motion of the object is determined by a computing unit depending on temporal modulations of the two or more receiver coil signals. A correlation coefficient of the motion signal and a receiver coil signal is computed by the computing unit. A reference correlation coefficient is determined by the computing unit depending on a location of the receiver coil based on a predetermined reference correlation map. The motion signal is corrected by the computing unit depending on a correlation coefficient and the reference correlation coefficient.

Abstract: A method for generating a movement signal of a body part, of which at least a portion is undergoing a cardiac movement, includes providing a pilot tone signal acquired from the body part by a magnetic resonance receiver coil arrangement. A demixing matrix is calculated from a calibration portion of the Pilot Tone signal using an independent component analysis algorithm. The independent component corresponding to the cardiac movement is selected. The demixing matrix is applied to further portions of the pilot tone signal to obtain a movement signal representing the cardiac movement. An, adaptive stochastic, or model-based filter is applied to the signal representing the cardiac movement, to obtain a filtered movement signal.

Abstract: A computer-implemented method is provided for evaluating a pilot tone signal. In the method, the pilot tone signal is recorded using a high-frequency coil arrangement of a magnetic resonance facility and describes a movement of a patient. The method also includes extracting movement information assigned to a movement component, (e.g., a respiratory movement). A breakdown or decomposition of the pilot tone signal is effected on a basis of signal components having assigned weightings and for the purpose of determining the movement information, a part of a base which is assigned to the movement component is selected by a selection criterion.

Abstract: A method is provided for generating a medical data set of a moving part of the human or animal body undergoing a cyclical movement such as cardiac movement. A raw data signal acquired by a magnetic resonance receiver coil arrangement is received. A magnetic resonance signal and a movement signal are separated from the raw data signal. At least two physiological phases of the moving body part are automatically assigned to the movement signal. The automatic assignment does not introduce a delay between the movement signal and the magnetic resonance signal. Time points used for triggering an acquisition of the magnetic resonance signal and/or for data post-processing of the magnetic resonance signal are determined or set.

Abstract: A method for measuring blood flow is provided. A modulated magnetic field is generated by a generator coil. Response signals of the modulated magnetic field are record from an object with an RF reception system. The response signals are measured by at least two RF antennae of the RF reception system. A flow component of the recorded response signals is separated from signal components resulting from movements of the object.

Abstract: A method for generating a movement signal of an object such as a body part of a human or animal is provided. The movement signal provides quantitative information on a movement of the object. The method includes acquiring an electromagnetic navigation signal such as a Pilot Tone signal from the object. The electromagnetic navigation signal is modulated by movements of the object. A reference signal is extracted from the navigation signal, and a parameter having a known time-dependency is determined from the reference signal. The navigation signal is corrected based on the parameter or a time-average of the parameter to reduce a signal drift in the navigation signal. The movement signal is extracted from the corrected navigation signal.

Abstract: A method for generating a movement signal of a body part, of which at least a portion is undergoing a cardiac movement, includes providing a pilot tone signal acquired from the body part by a magnetic resonance receiver coil arrangement. A demixing matrix is calculated from a calibration portion of the Pilot Tone signal using an independent component analysis algorithm. The independent component corresponding to the cardiac movement is selected. The demixing matrix is applied to further portions of the pilot tone signal to obtain a movement signal representing the cardiac movement. An, adaptive stochastic, or model-based filter is applied to the signal representing the cardiac movement, to obtain a filtered movement signal.

Abstract: A method is provided for generating a medical data set of a moving part of the human or animal body undergoing a cyclical movement such as cardiac movement. A raw data signal acquired by a magnetic resonance receiver coil arrangement is received. A magnetic resonance signal and a movement signal are separated from the raw data signal. At least two physiological phases of the moving body part are automatically assigned to the movement signal. The automatic assignment does not introduce a delay between the movement signal and the magnetic resonance signal. Time points used for triggering an acquisition of the magnetic resonance signal and/or for data post-processing of the magnetic resonance signal are determined or set.