Abstract: The invention relates to a method of MR imaging of an object (10) positioned in an examination volume of a MR device (1). It is an object of the invention to enable efficient and high-quality non-Cartesian MR imaging, even in situations of strong B0 inhomogeneity. In accordance with the invention, the method comprises: —subjecting the object to an imaging sequence comprising at least one RF excitation pulse and modulated magnetic field gradients, —acquiring MR signals along at least one non-Cartesian k-space trajectory, —reconstructing an MR image from the acquired MR signals, and —detecting one or more mal-sampling artefacts caused by B0 inhomogeneity induced insufficient k-space sampling in the MR image using a deep learning network. Moreover, the invention relates to a MR device (1) and to a computer program.

Abstract: A fat suppressed diffusion image determination apparatus, a corresponding method and a corresponding computer program determine a diffusion weighted magnetic resonance image (DWI) of an object. The fat suppressed diffusion image determination apparatus includes a diffusion reference image providing unit for providing a diffusion reference MR image of the object, a fat image determination unit for determining a fat image from the diffusion reference MR image, a diffusion weighted image providing unit for providing a diffusion weighted MR image of the object, a fat suppressed image determination unit for determining a fat suppressed diffusion weighted MR image using a combination of the diffusion weighted MR image and the fat image.

Abstract: The invention provides for a magnetic resonance imaging system (100) for acquiring magnetic resonance data (144, 146) of a subject (118) within an imaging zone (108), wherein the magnetic resonance imaging system comprises a memory storing a set of parameter ranges (150). At least a portion of the parameter ranges are user configurable.

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 MR signal acquisition in a single scan providing the necessary information for electric properties imaging (EPT), namely a phase map as well as tissue boundaries. The method of the invention comprises the following steps: —subjecting the object (10) to a multi echo steady state imaging sequence or a fast spectroscopic imaging sequence comprising RF pulses and switched magnetic field gradients, wherein two or more echo signals are generated after each RF excitation; —acquiring the echo signals; —deriving a magnitude image and a phase map from the acquired echo signals, which phase map represents the spatial RF field distribution induced by the RF pulses in the object (10); and —reconstructing an electric conductivity map from the magnitude image and from the phase map, wherein tissue boundaries are derived from at least the magnitude image.

Abstract: The invention relates to a method of MR imaging of an object (10) positioned in an examination volume of a MR device (1). It is an object of the invention to enable efficient and high-quality non-Cartesian MR imaging, even in situations of strong B0 inhomogeneity. In accordance with the invention, the method comprises: —subjecting the object to an imaging sequence comprising at least one RF excitation pulse and modulated magnetic field gradients, —acquiring MR signals along at least one non-Cartesian k-space trajectory, —reconstructing an MR image from the acquired MR signals, and —detecting one or more mal-sampling artefacts caused inhomogeneity induced insufficient k-space sampling in the MR image using a deep learning network. Moreover, the invention relates to a MR device (1) and to a computer program.

Abstract: A method of magnetic resonance (MR) imaging to enable ‘silent’ zero echo time (ZTE) imaging in combination with water/fat separation. The method includes subjecting the object to a first self-refocusing zero echo time imaging sequence, wherein a first sequence of gradient echo signals is acquired as a first number N1 of radial k-space spokes at a first repetition time TR1; subjecting the object to a second self-refocusing zero echo time imaging sequence, wherein a second sequence of gradient echo signals is acquired as a second number N2 of radial k-space spokes at a second repetition time TR2, wherein N2?N1 and/or TR2?TR1; and reconstructing a MR image from the acquired gradient echo signals. Signal contributions of chemical species (e.g., water and fat) may be separated exploiting the different echo times attributed to the gradient echo signals.

Abstract: The invention relates to a method of MR imaging of an object positioned in an examination volume of a MR device (1). It is an object of the invention to enable ‘silent’ zero echo time (ZTE) imaging in combination with water/fat separation. In accordance with the invention, a method of MR imaging of an object positioned in the examination volume of a MR device is disclosed.

Abstract: The invention provides for a magnetic resonance imaging system (100) for acquiring magnetic resonance data (144, 146) of a subject (118) within an imaging zone (108), wherein the magnetic resonance imaging system comprises a memory storing a set of parameter ranges (150). At least a portion of the parameter ranges are user configurable.

Abstract: The invention relates to a fat suppressed diffusion image determination apparatus, a corresponding method and a corresponding computer program, for determining a diffusion weighted magnetic resonance image (DWI) of an object (10), the fat suppressed diffusion image determination apparatus (100) comprising: a diffusion reference image providing unit (110) for providing a diffusion reference MR image of the object (10), a fat image determination unit (120) for determining a fat image from the diffusion reference MR image, a diffusion weighted image providing unit (130) for providing a diffusion weighted MR image of the object, a fat suppressed image determination unit (140) for determining a fat suppressed diffusion weighted MR image using a combination of the diffusion weighted MR image and the fat image. The invention allows for a robust fat suppression in diffusion MRI with improved SNR and scan time trade-off.

Abstract: A method of MR imaging of a body (10) of a patient reduces contrast blurring in PROPELLER imaging combined with multi-echo acquisitions.

Abstract: A magnetic resonance imaging system (10) includes a magnetic gradient coil system (22) configured for generating gradient magnetic fields by providing a predetermined temporal electrical current profile to at least one magnetic gradient coil in accordance with a desired magnetic resonance examination mode. An additional device (50), which is not part of the original magnetic resonance imaging system (10) is positioned within an inner region (44) of the magnetic resonance imaging system (10) for special examination or other purposes. The additional device (50) is capable of generating an eddy current in at least a portion of the additional device (50) when exposed to the generated gradient magnetic field.

Abstract: A medical imaging system comprising: a memory and a processor configured by machine executable instructions that cause the processor to: receive multiple magnetic resonance images, the multiple magnetic resonance images comprising voxels; calculate an image segmentation for each of the multiple magnetic resonance images, the image segmentation dividing each of the multiple magnetic resonance images into regions; assign a tissue classification to each of the regions using a magnetic resonance imaging tissue classifier; calculate a Hounsfield unit map for each of the multiple magnetic resonance images by assigning a Hounsfield unit value to each of the voxels according to the tissue classification, the Hounsfield mapping comprising a mapping between the tissue classification to Hounsfield units; and calculate a virtual CT image for each of the multiple magnetic resonance images using the Hounsfield unit mapping.

Abstract: The invention provides for a magnetic resonance imaging system (100, 300, 500) comprising a radio-frequency system (114, 116) comprising multiple coil elements (114) for acquiring imaging magnetic resonance data (166) from a subject (118). The magnetic resonance imaging system further comprises a memory (150) for storing machine executable instructions (160). The memory further stores imaging pulse sequence commands (164). The imaging pulse sequence commands are configured for controlling the magnetic resonance imaging system to acquire the imaging magnetic resonance data according to a chosen parallel magnetic resonance imaging protocol. The magnetic resonance imaging system further comprises a processor (144) for controlling the magnetic resonance imaging system.

Abstract: The present invention provides a safety monitoring device (10) for detecting radio frequency resonances in a subject of interest (12) comprising an essentially tubular examination space (14), which is vertically arranged, for locating therein the subject of interest (12), an radio frequency resonance device (16), which has at least one connection port (21), for covering at least a part of the examination space (14) along its longitudinal axis, a rotation device (22) for rotating the radio frequency resonance device (16) relative to the subject of interest (12), a controlling device (30) for controlling the rotation of the radio frequency resonance device (16), and a detection device (34) for monitoring an impedance of the at least one connection port (21) of the radio frequency resonance device (16) during the rotation and detecting radio frequency resonances out of the monitored impedance of the at least one connection port (21) of the radio frequency resonance device (16).

Abstract: The invention relates to a method of MR imaging of a body (10) of a patient. It is an object of the invention to provide a method that reduces contrast blurring in PROPELLER imaging combined with multi-echo acquisitions.

Abstract: A light data communication link device (50) for use in a magnetic resonance examination system (10) comprises a first light emitter and receiver unit (52) and a second light emitter and receiver unit (76). A light generating member (54), a first optical waveguide (62) and a light diffuser (58) of the first light emitter and receiver unit (52), a distance in space between the light diffuser (58) and a converging lens (84) of the second light emitter and receiver unit (76), and the converging lens (84), a second optical waveguide (88) and a light receiving member (80) of the second light emitter and receiver unit (76) form a first optical pathway (90) for data communication.

Abstract: Magnetic resonance (MR) imaging of an area (144) of a subject of interest (120) includes issuing a breath-hold command to the subject of interest (120), performing motion detection of the subject of interest (120) to detect a breath-hold condition in the area (144) of the subject of interest (120), upon detection of the breath-hold condition in the area (144) of the subject of interest (120), performing k-space (154) sampling of the area (144) of the subject of interest (120) with a given resolution, processing the k-space (154) samples covering the area (144) of the subject of interest (120) to obtain a MR image of the area (144) of the subject of interest (120).

Abstract: A magnetic resonance imaging (MRI) system (600) obtains magnetic resonance (MR) images of a volume. The MRI system includes at least one controller (610) configured to perform a preparation scan (103, 301) to acquire preparation echo phase information (105, PEPI) for a plurality of dynamics of a scan (300); output a plurality of pulse sequences (200), each pulse sequence is configured for a corresponding dynamic of the plurality of dynamics of the scan and includes a navigator sequence (204) and an image sequence (206); acquire navigation and image information (111, 117) for each corresponding pulse sequence of the plurality of pulse sequences; and/or form corrected image information (125) by correcting echo phase information in accordance with the preparation echo phase information, correcting at least one of gradient delay or frequency offset of the image information in accordance with the navigation information.

Abstract: A magnetic resonance imaging system (10) comprises a magnetic gradient coil system (22) configured for generating gradient magnetic fields by providing a predetermined temporal electrical current profile to at least one magnetic gradient coil in accordance with a desired magnetic resonance examination mode. An additional device (50), which is not part of the original magnetic resonance imaging system (10) as such, is intended to be positioned within an inner region (44) of the magnetic resonance imaging system (10) for special examination or other purposes. The additional device (50) is capable of generating an eddy current in at least a portion of the additional device (50) when being exposed to the generated gradient magnetic field.

Abstract: The invention provides for a medical imaging system (100, 300) comprising: a memory (112) for storing machine executable instructions (140) and a processor (106) for controlling the medical system.