Abstract: The present patent disclosure describes a new method and a new device for determining a spatial distribution of at least one tissue parameter within a sample based on a time domain magnetic resonance, TDMR, signal emitted from the sample after excitation of the sample according to an applied pulse sequence. The spatial distribution is determined using a calculated sparse Hessian, wherein the sparse Hessian is calculated based on the applied pulse sequence.

Abstract: The invention relates to a motion determination device for determining the motion of an object. The motion determination device comprises a magnetic resonance (MR) information providing unit (2, 5) for providing an MR image of the object (6) and for providing non-image MR data of the object which have been acquired at different acquisition times, and a motion determination unit (9) for determining a motion field, which describes the motion of the object (6), depending on the provided non-image MR data acquired at the different acquisition times and the provided MR image. Since the non-image MR data, which are preferentially k-space data, are directly used for determining the motion field, i.e. without an intermediate reconstruction of MR images based on the non-image MR data, the motion field can be determined with a very high temporal resolution.

Abstract: The present patent disclosure relates to a method and a device 700 for determining a spatial distribution of at least one tissue parameter within a sample on a time domain magnetic resonance, TDMR, signal emitted from the sample after excitation of the sample according to an applied pulse sequence, a method of obtaining at least one time dependent parameter relating to a magnetic resonance, MR, signal emitted from a sample after excitation of the sample according to an applied spin echo pulse sequence, and a computer program product for performing the methods. A TDMR signal model is used to approximate the emitted time domain magnetic resonance signal. The model is factorized into one or more first matrix operators that have a non-linear dependence on the at least one tissue parameter and a remainder of the TDMR signal model.

Abstract: The present patent disclosure describes a new method and a new device for determining a spatial distribution of at N least one tissue parameter within a sample based on a time domain magnetic resonance, TDMR, signal emitted from the sample after excitation of the sample according to an applied pulse sequence. The spatial distribution is determined using a calculated sparse Hessian, wherein the sparse Hessian is calculated based on the applied pulse sequence.

Abstract: The invention relates to a motion determination device for determining the motion of an object. The motion determination device comprises a magnetic resonance (MR) information providing unit (2, 5) for providing an MR image of the object (6) and for providing non-image MR data of the object which have been acquired at different acquisition times, and a motion determination unit (9) for determining a motion field, which describes the motion of the object (6), depending on the provided non-image MR data acquired at the different acquisition times and the provided MR image. Since the non-image MR data, which are preferentially k-space data, are directly used for determining the motion field, i.e. without an intermediate reconstruction of MR images based on the non-image MR data, the motion field can be determined with a very high temporal resolution.

Abstract: A system for performing time-domain magnetic resonance imaging includes an excitation device for transiently exciting a sample thereby causing the sample to emit an MRI signal. A receiving coil receives the MRI signal. A simulated signal of the receiving coil is generated in a time domain, based on a plurality of spatial parameter distributions, wherein the spatial parameter distributions include a spatial distribution of a magnetization, wherein the spatial parameter distributions further include at least one of a spatial distribution of a material property of a material of the sample and a spatial distribution of an electromagnetic field. An objective function is based on a difference between the received MRI signal and the simulated signal in the time domain. The plurality of spatial parameter distributions are fitted based on the objective function. The sample is excited again before the sample reaches an equilibrium state.

Abstract: A system for performing time-domain magnetic resonance imaging comprises an excitation device for transiently exciting a sample thereby causing the sample to emit an MRI signal. A receiving coil receives the MRI signal. A simulated signal of the receiving coil is generated in a time domain, based on a plurality of spatial parameter distributions, wherein the spatial parameter distributions include a spatial distribution of a magnetization, wherein the spatial parameter distributions further include at least one of a spatial distribution of a material property of a material of the sample and a spatial distribution of an electromagnetic field. An objective function is based on a difference between the received MRI signal and the simulated signal in the time domain. The plurality of spatial parameter distributions are fitted based on the objective function. The sample is excited again before the sample reaches an equilibrium state.

Abstract: The invention relates to a method of MR imaging of an object (10) placed in an examination volume of a MR device (1). It is an object of the invention to enable improved electrical properties tomography. The invention proposes that the method comprises the steps of:—subjecting the object (10) to two or more imaging sequences for acquiring MR signals, wherein the imaging sequences each comprise at least one RF pulse and at least one switched magnetic field gradient; reconstructing two or more MR phase images from MR signals acquired by means of imaging sequences comprising switched magnetic field gradients of opposed polarity; deriving a spatial distribution of electrical properties of the object (10) from the MR phase images.

Abstract: An antenna array adapted for magnetic resonance imaging, wherein the antenna array comprises at least one antenna element, wherein each antenna element comprises:-a substrate with a first side and a second side, wherein the substrate comprises a dielectric material,-at least one dipole antenna, wherein the dipole antenna is attached to the second side of the substrate, wherein the dipole antenna comprises a first connection adapted for connecting the dipole antenna to a transmission line.