Abstract: A multiply phase-cycled steady state free precession sequence has at least two sub-sequences with alternating radio-frequency excitation pulses. An intermediate image data set is generated from raw data that are acquired with each sub-sequence. A resulting image data set is formed from the intermediate image data sets. Radio-frequency excitation pulses for different sub-sequences have supplementary phases differing from one another, such that successive radio-frequency excitation pulses cannot lead to a non-alternating excitation in any sub-sequence. A magnetic resonance apparatus has a corresponding apparatus controller that implements the sequence.

Abstract: In a method and apparatus for generation of magnetic resonance (MR) images based on the TrueFISP sequence with simultaneous acquisition of the MR images of a number of parallel slices of a measurement subject the number of the slices N to be acquired in the measurement subject is established whereby N is at least, the number of the phase coding lines MA per raw data matrix and slice N are established, with the requirement that the quotient of MA and N is a natural number, the repetition time TR, the radio-frequency pulse duration RF and the flip angle ? are established, of each raw data matrix is sub-divided into S separate segments to be measured, whereby S is equal to N or a whole-number multiple of N, with the requirement that the quotient Q of MA and S that corresponds to the number of the phase coding lines per segment is a natural number, data are acquired for all segments S of all slices N, whereby the time duration, in msec, TSeg for the acquisition of the data of each segment is T Seg = TR +

Abstract: In a magnetic resonance imaging method and apparatus, a double echo sequence having a gradient echo and a spin echo is implemented with a flow compensation for the gradient echo in at least one direction. The flow compensation gives the double echo sequence an insensitivity to flow phenomena.

Abstract: In a method for operation of a magnetic resonance system, radio-frequency excitation pulses are radiated into a tissue that contains at least a first tissue type with a first resonance frequency and a second tissue type with a second resonance frequency. A readout gradient is activated with polarity changing at least twice between two radio-frequency excitation pulses, to read out the signals of the at least two gradient echoes at points in time of the signal readout selected such that the gradient echoes of both tissue types have the same phase position, and/or the phase position of the gradient echoes of the first tissue lies counter to the phase position of the gradient echoes of the second tissue type, or the phase positions of the gradient echoes of both tissue types relative to one another are not taken into account in the selection of the signal readout.

Abstract: A radio-frequency antenna for acquisition of a magnetic resonance signal has two electrodes that are connected with one another via a discrete tuning device. The first radio-frequency antenna) is tuned to a resonance frequency by the tuning device. The tuning device has a first tuning element influencing the resonance frequency of the radio-frequency antenna and a second tuning element influencing the resonance frequency of the first radio-frequency antenna. The tuning elements are connected in series and fashioned as inductors. The radio-frequency antenna also has two tap points at which an acquisition signal representative of the acquired magnetic resonance signal is tapped and conducted away via feed lines. The tap points are respectively arranged between the electrodes and the tuning element and one of said tap points is between the first and second tuning elements.

Abstract: In a method and apparatus for generating an image from magnetic resonance signals, two image matrices generated from magnetic resonance signals are added to or subtracted from one another pixel-by-pixel, to generate a further image therefrom. The magnitude added or subtracted for each picture element is formed by multiplication of a magnitude value of the second image matrix by a weighting factor. The weighting factor is dependent on the magnitude value of the second image matrix such that it is higher given a high magnitude value than for a low magnitude value. The magnitude noise is decreased compared to a linear addition or subtraction, and uncontrolled signal reductions are avoided. An exponent in the power of the magnitude value of the second image matrix a signal-dependent weighting factor can be set at an input device.

Abstract: A radio-frequency antenna for acquisition of a magnetic resonance signal has two electrodes that are connected with one another via a discrete tuning device. The first radio-frequency antenna) is tuned to a resonance frequency by the tuning device. The tuning device has a first tuning element influencing the resonance frequency of the radio-frequency antenna and a second tuning element influencing the resonance frequency of the first radio-frequency antenna. The tuning elements are connected in series and fashioned as inductors. The radio-frequency antenna also has two tap points at which an acquisition signal representative of the acquired magnetic resonance signal is tapped and conducted away via feed lines. The tap points are respectively arranged between the electrodes and the tuning element and one of said tap points is between the first and second tuning elements.

Abstract: A method is disclosed for imaging in a medical diagnostic unit. The method includes recording a three-dimensional image data record of an examination object, reconstructing three-dimensional image data to produce a number of p images of the examination object, which respectively have a slice thickness d, assembling in each case n images to form a combined image having the slice thickness n·d, displaying at least one of the p/n combined images for the diagnosis instead of the p images, and displaying the individual produced images having the slice thickness d upon request by the user. The individual images, and no longer the combined images are automatically displayed when an actuating element of the diagnostic unit is actuated in a certain way.

Abstract: Nuclear spin tomography (synonym: magnetic resonance tomography, MRT) is applied in medicine for the purpose of examining patients. A method is proposed for improving the image homogeneity of image data from phase-cycled steady state sequences in magnetic resonance tomography. In the method, both the sum of squares (SOS) and the maximum intensity projection (MIP) are calculated, pixel-wise, from the image data of the participating sequences. Further, a result image optimized with regard to image homogeneity is obtained by pixel-wise combination of the sum-of-squares image and MIP image.

Abstract: In a method for operation of a magnetic resonance system, radio-frequency excitation pulses are radiated into a tissue that contains at least two different tissue types, namely a first tissue type with a first resonance frequency and a second tissue type with a second resonance frequency, a readout gradient is activated with polarity changing at least twice between two radio-frequency excitation pulses; with a gradient echo of the tissue being generated by each bipolar gradient switching; the echo time thereof corresponds to the time duration from a radio-frequency excitation pulse to the gradient echo, the signals of the at least two gradient echoes are read out by activating readout gradient between two radio-frequency excitation pulses, and the points in time of the signal readout are selected such that the gradient echoes of both tissue types have the same phase position, and/or the phase position of the gradient echoes of the first tissue lies counter to the phase position of the gradient echoes of the s

Abstract: In a method for operating a magnetic resonance apparatus with a steady-state pulse sequence and a magnetic resonance apparatus for implementing the method, to reduce magnetization in an examination subject outside of a slice of interest, an RF pulse acting selectively on a slice of interest and an RF pulse acting non-selectively on a slice of interest are alternately emitted to an examination subject in a steady-state pulse sequence.

Abstract: A device is provided for electrically stimulating parts of the nervous system for the treatment of medical conditions. The device includes a generator, an intracorporeal electrode suitable for implantation in a human body and an MRT-compatible coupling. The MRT-compatible coupling couples the generator and the electrode in a manner that enables energy transfer from the generator to the electrode and which retains the generator and electrode in electrical isolation. The generator provides energy, such as in the form of light, to the electrode via the MRT-compatible coupling to generate and control the voltage in the electrode for stimulating parts of the nervous system. The generator can control the light intensity in order to adjust the strength of the electrode voltage.

Abstract: In a method and apparatus for generation of magnetic resonance (MR) images based on the TrueFISP sequence with simultaneous acquisition of the MR images of a number of parallel slices of a measurement subject the number of the slices N to be acquired in the measurement subject is established whereby N is at least, the number of the phase coding lines MA per raw data matrix and slice N are established, with the requirement that the quotient of MA and N is a natural number, the repetition time TR, the radio-frequency pulse duration RF and the flip angle ? are established, of each raw data matrix is sub-divided into S separate segments to be measured, whereby S is equal to N or a whole-number multiple of N, with the requirement that the quotient Q of MA and S that corresponds to the number of the phase coding lines per segment is a natural number, data are acquired for all segments S of all slices N, whereby the time duration, in msec, TSeg for the acquisition of the data of each segment is T Seg = TR + R

Abstract: An imaging apparatus is disclosed that displays an image acquired from an examination object. The apparatus includes an acquisition unit that determines image acquisition parameters and acquires the signal values of the examination object; a conversion unit that uses a transfer function to convert the acquired signal values into brightness values that are displayed in the image; a unit for extracting the image acquisition parameters; and a storage unit that has data records in which at least one transfer function is stored in relation to the image acquisition parameters. The conversion unit compares the image acquisition parameters with the image acquisition parameters stored in the storage unit and selects the transfer function as a function of the comparison.

Abstract: A method is for producing a map from raw magnetic resonance data from a magnetic resonance tomography unit or a spectrum from raw magnetic resonance data from a magnetic resonance spectroscopy unit. The method involves the raw data being filtered, preferably using a high pass filter and using a low pass filter. Next, the two absolute values of the filtered, Fourier transformed raw magnetic resonance data are used to produce the map or the spectrum by a weighted combination. The method is distinguished in that the signal to noise ratio can be improved together with an increase in the edge sharpness.

Abstract: In a magnetic resonance tomography apparatus and method for determination of T2-weighted images of tissue with short T2 time, in the framework of a steady-state free precession sequence with non-slice-selective RF excitation pulses and projection-reconstruction methods, in each sequence repetition a first steady-state is read out in the form of a half echo and a second steady-state signal is read out in the form of a further half echo with very short echo times TE1 and TE2=2TR?TE1, and are combined by weighted addition such that an MRT image of tissue with very short T2 time is obtained with the sequence.

Abstract: Nuclear spin tomography (synonym: magnetic resonance tomography, MRT) is applied in medicine for the purpose of examining patients. A method is proposed for improving the image homogeneity of image data from phase-cycled steady state sequences in magnetic resonance tomography. In the method, both the sum of squares (SOS) and the maximum intensity projection (MIP) are calculated, pixel-wise, from the image data of the participating sequences. Further, a result image optimized with regard to image homogeneity is obtained by pixel-wise combination of the sum-of-squares image and MIP image.

Abstract: In a magnetic resonance apparatus and method to acquire a diffusion-weighted image in diffusion-weighted MRT imaging, a non-diffusion-weighted data set and a diffusion-weighted data set are measured and stored by means of a DESS sequence (Double Echo Steady State Sequence), with two readout gradients being switched successively for the non-diffusion-weighted data set, and a bipolar diffusion gradient pulse sequence being switched between two readout gradients for the diffusion-weighted data set. A diffusion-weighted MRT image is calculated is calculated based on the non-diffusion-weighted data set and the diffusion-weighted data set, as well as on the basis of a value characterizing the diffusion-weighted measurement.

Abstract: In a magnetic resonance tomography apparatus and method, whereby an interactive contrast optimization is implemented by defining a multi-contrast sequence for exciting nuclear spins in a slice of a subject to be measured, defining parameters characteristic of the sequence, measuring a number of contrast versions of the slice in the form of raw data with the previously defined sequence, processing the raw data of the slice, and thereby generating a number of images of the slice that differ in contrast from one another and generating an image with improved contrast on the basis of an interactive real-time contrast variation of the images acquired by the multi-contrast sequence, via a user interface.

Abstract: In a method for operating a magnetic resonance apparatus with a steady-state pulse sequence and a magnetic resonance apparatus for implementing the method, to reduce magnetization in an examination subject outside of a slice of interest, an RF pulse acting selectively on a slice of interest and an RF pulse acting non-selectively on a slice of interest are alternately emitted to an examination subject in a steady-state pulse sequence.