In a method and magnetic resonance (MR) tomography system for generating image data of a subject to be examined, situated in an MR scanner, during a magnetic resonance measurement the subject is repeatedly moved back and forth relative to a magnet/gradient system of the MR scanning between a starting position and an end position. During this movement, portions of a total raw image data set, which is required for the reconstruction of image data for slices of an image stack in the subject, are in each case acquired in different sweeps from the starting position to the end position and/or from the end position to the starting position.

In a method and device for generating 4D flow images by operation of a magnetic resonance system, a volume flow data record is recorded, wherein the flow is encoded in a single direction. This is subsequently repeated with all the flow encoding directions. From the raw data associated with the individual flow encoding directions, phase images and magnitude images are calculated. Deformation fields are calculated on the basis of the magnitude images. The deformation fields are applied to the calculated phase images. Finally, a 4D flow velocity field is calculated, on the basis of a phase difference reconstruction of the corrected phase images.

A method is for performing an angiographic measurement and creating an angiogram of a body region of a patient in a magnetic-resonance system and a magnetic-resonance system for operating such a method. In an embodiment, the method includes acquisition of a body region; division of the angiographic measurement into partial angiographic measurements; displaying the measurement start times, the measurement duration and the measurement end times of the partial angiographic measurements; changing the measuring time points; definition of sequence parameters of the partial angiographic measurements based on the changed measurement start times and/or measurement end times such that the partial angiographic measurement is performable between the associated measurement start time and measurement end time; provision of the sequence parameters of the control unit of the magnetic-resonance system; performance of the partial angiographic measurements; and creation of the angiogram using the partial angiographic measurements performed.

A magnetic resonance method and system are provided for projection MR imaging of vascular structures within a subject, with scan times that are shorter than those needed for conventional techniques. Image acquisition sequences are synchronized with heartbeat cycles of the subject, and are configured to generate image data having a reduced spatial resolution in the projection direction perpendicular to a preselected projection plane. A reduction factor F quantifies this reduced resolution, such that the number of data acquisition sequences provided within each heartbeat cycle is F times as many as a comparable imaging protocol that generates full-resolution data. The total scan time can be reduced by a factor of F with negligible degradation in the projection image quality.

A method is provided for creating magnetic resonance images of a predetermined three-dimensional volume segment of a living object undergoing examination, using a magnetic resonance device. The method includes acquiring magnetic resonance data in the volume segment by radial acquisition of a k-space for a predetermined duration of capture that includes at least one full respiratory period of the object undergoing examination; analyzing the magnetic resonance data in order to determine therefrom at least one respiratory period; forming at least one data group that includes only the magnetic resonance data that belongs to at least one respiratory state of the at least one respiratory period; and creating the magnetic resonance images from only the magnetic resonance data of the at least one data group. Here, it is advantageous that magnetic resonance images of higher temporal resolution and/or better image quality, in particular with smaller image artifacts, may be provided.

A patient couch for a magnetic resonance tomography system and a magnetic resonance tomography system are provided. The patient couch includes a feed facility for radiofrequency energy having a plurality of conduction paths for feeding radiofrequency energy. The patient couch also includes a plurality of plug-in connectors for local coils having a transmit coil, and a distribution structure for the distribution of radiofrequency energy from the feed facility to the plug-in connectors.

In a method and magnetic resonance (MR) apparatus for implementing an MR examination of an examination subject with a predetermined MR measurement protocol at several different bed positions of the bed of the MR apparatus, a respective anatomical structure of the examination subject is determined for each of the several bed positions and a respective specific absorption rate is determined for each of the several bed positions as a function of the respective anatomical structure of the examination subject at the corresponding bed position and the predetermined MR measurement protocol. The specific absorption rates for the several bed positions are determined before electromagnetic fields are generated according to the respective predetermined MR measurement protocol. The specific absorption rates are compared with an absorption rate threshold value and a notification is output if at least one of the specific absorption rates exceeds the absorption rate threshold value.

In a method and magnetic resonance (MR) apparatus for performing an MR examination with prospective motion correction, multiple MR signals are acquired. For each MR signal, signal, an examination volume is established and a navigator volume is established for recording navigator signals. The examination volume and the navigator volume are not identical. At least one navigator reference signal is acquired at a time t0, and at least one navigator signal is acquired at a time t1>t0. Motion information is determined from the navigator signal and the navigator reference signal, and the recording parameters are set as a function of the motion information. At least one further magnetic resonance signal is acquired with this setting.

The invention relates to a system and method for estimating a quantity of interest from perfusion data resulting from the acquisition of a plurality of a patient volumes or stations. Such a method may include a step for triggering the output of said quantity of interest in the form of a consolidated map by means of an adapted man-machine interface.

An MRI apparatus performs an MRI while moving a patient table and includes a main magnet configured to generate a static magnetic field in a bore; a gradient coil assembly configured to apply a gradient signal to the static magnetic field to generate a magnetic field gradient; an RF coil assembly configured to apply an RF excitation signal and an RF refocusing signal; and a controller configured to control the RF refocusing signal so that a slice to which the RF refocusing signal is to be applied conforms to the slice to which the RF excitation signal has been applied.