Abstract: An image processing system 100 for enabling a user to navigate through image data having at least three spatial dimensions by displaying views 155 of the image data, the image processing system comprising an image device 110 comprising a display 130 for displaying the views of the image data and an orientation sensor 120 for measuring an orientation of the image device with respect to a reference orientation for providing rotation data 125 indicative of a device rotation of the image device, means 140 for establishing a center of rotation in the image data, and an image processor 150 for establishing the views of the image data in relation to the device rotation by, for establishing a current view, (i) receiving the rotation data from the orientation sensor, (ii) establishing a view rotation in relation to the device rotation, and (iii) establishing the current view in dependence on the view rotation around the center of rotation with respect to a reference view.

Abstract: An image processing system 100 for enabling a user to navigate through image data having at least three spatial dimensions by displaying views 155 of the image data, the image processing system comprising an image device 110 comprising a display 130 for displaying the views of the image data and an orientation sensor 120 for measuring an orientation of the image device with respect to a reference orientation for providing rotation data 125 indicative of a device rotation of the image device, means 140 for establishing a center of rotation in the image data, and an image processor 150 for establishing the views of the image data in relation to the device rotation by, for establishing a current view, (i) receiving the rotation data from the orientation sensor, (ii) establishing a view rotation in relation to the device rotation, and (iii) establishing the current view in dependence on the view rotation around the center of rotation with respect to a reference view.

Abstract: Image processing system 100 for enabling a user to navigate through image data having at least three spatial dimensions by displaying views 155 of the image data, the image processing system comprising an image device 110 comprising a display 130 for displaying the views of the image data and an orientation sensor 120 for measuring an orientation of the image device with respect to a reference orientation for providing rotation data 125 indicative of a device rotation of the image device, means 140 for establishing a center of rotation in the image data, and an image processor 150 for establishing the views of the image data in relation to the device rotation by, for establishing a current view, (i) receiving the rotation data from the orientation sensor, (ii) establishing a view rotation in relation to the device rotation, and (iii) establishing the current view in dependence on the view rotation around the center of rotation with respect to a reference view.

Abstract: A medical image system (100)for enables a user to navigate through three-dimensional 3D image data showing an anatomical structure by simultaneously displaying a set of views of the 3D image data showing the anatomical structure. The system includes a data input (140) for receiving orientation data (142), a user input (120) for receiving a navigation command (122)from the user, a plane processor (160) for, in dependence on the navigation command, adjusting a spatial configuration of a set of planes (102) for obtaining a further set of planes (162) intersecting the 3D image data, and a view processor (180) for, in dependence on the further set of planes and the orientation data, establishing a further set of views (182) of the 3D image data for displaying the further set of views as an update of the set of views.

Abstract: The invention relates to a method of MR imaging near metal parts using SEMAC. It is an object of the invention to provide an improved MR imaging technique that is sufficiently fast and robust against susceptibility effects. The invention proposes to apply a weaker slice-selection magnetic field gradient (Gslice) for reduction of ripple-artefacts near metal parts or to apply undersampling in the slice-selection direction of the SEMAC sequence or to apply both these aspects. According to one aspect of the invention, a sparsity constraint is used to make the reconstruction of the undersampled MR images more stable. Moreover, the invention relates to a MR device (1) and to a computer program to be run on a MR device (1).

Abstract: A method and apparatus for parallel MR imaging include the steps of: —subjecting a portion of a body (10) to a first imaging sequence (21,22) of RF pulses and switched magnetic field gradients, wherein first MR signals (11,12) are acquired via at least two RF coils having different spatial sensitivity profiles within the examination volume, —deriving the spatial sensitivity profiles of the at least two RF coils from the acquired first MR signals, —subjecting the portion of the body to a second imaging sequence of RF pulses and switched magnetic field gradients, wherein second MR signals are acquired by parallel acquisition via the at least two RF coils with sub-sampling of k-space, and—reconstructing a MR image from the acquired second MR signals and from the spatial sensitivity profiles of the at least two RF coils. A type and/or parameters of the first imaging sequence are selected automatically depending on the presence of a metal implant in the body.

Abstract: The invention relates to a method of parallel MR imaging, wherein a reference scan is performed by means of a stimulated echo sequence including i) at least two preparation RF pulses (?) radiated toward a portion of a body (10) during a preparation period (21), and ii) one or more reading RF pulses (?) radiated toward the portion of the body (10) during an acquisition period (22) temporally subsequent to the preparation period (21). One or more FID signals (I1) and one or more stimulated echo signals (I2) are acquired during the acquisition period (22). The spatial receive and/or—if applicable—transmit4 sensitivity profiles of at least two RF coils (11, 12, 13) are derived from the acquired FID signals (I1) and/or from the acquired stimulated echo signals (I2). The parameters of the stimulated echo sequence are selected such that it is robust against susceptibility-induced artifacts. Moreover, 10 the invention relates to a MR device (1) and to a computer program for a MR device (1).

Abstract: When magnetic resonance imaging in the vicinity of a metallic object (like, for instance, a metal implant), severe spatial perturbations of the static magnetic field occur. In order to suppress the back-folding of distant off-resonant signals into the region of interest, the imaging volume is spatially restricted by selection gradients applied concurrently with the excitation and the refocusing RF pulses in a spin echo sequence. The selection gradient applied during the excitation pulse has an amplitude and/or a polarity different from that of the selection gradient applied during the refocusing pulse so that the respectively selected slices in an off-resonance frequency versus spatial coordinate diagram become tilted with respect to one another. The applied imaging technique may of the SEMAC or MAVRIC type and may incorporate compressed sensing, parallel imaging, fat suppression and/or SVD-based noise reduction.

Abstract: The invention relates to a method of parallel MR imaging which comprises the steps of: ?—subjecting a portion of a body (10) to a first imaging sequence (21,22) of RF pulses and switched magnetic field gradients, wherein first MR signals (11,12) are acquired via at least two RF coils having different spatial sensitivity profiles within the examination volume, ?—deriving the spatial sensitivity profiles of the at least two RF coils from the acquired first MR signals, ?—subjecting the portion of the body to a second imaging sequence of RF pulses and switched magnetic field gradients, wherein second MR signals are acquired by parallel acquisition via the at least two RF coils with sub-sampling of k-space, and ?—reconstructing a MR image from the acquired second MR signals and from the spatial sensitivity profiles of the at least two RF coils. According to the invention, the type and/or parameters of the first imaging sequence are selected automatically depending on the presence of a metal implant in the body.

Abstract: The invention relates to a method of MR imaging near metal parts using SEMAC. It is an object of the invention to provide an improved MR imaging technique that is sufficiently fast and robust against susceptibility effects. The invention proposes to apply a weaker slice-selection magnetic field gradient (Gslice) for reduction of ripple-artefacts near metal parts or to apply undersampling in the slice-selection direction of the SEMAC sequence or to apply both these aspects. According to one aspect of the invention, a sparsity constraint is used to make the reconstruction of the undersampled MR images more stable. Moreover, the invention relates to a MR device (1) and to a computer program to be run on a MR device (1).

Abstract: The invention relates to a method of parallel MR imaging, wherein a reference scan is performed by means of a stimulated echo sequence including i) at least two preparation RF pulses (a) radiated toward a portion of a body (10) during a preparation period (21), and ii) one or more reading RF pulses 03) radiated toward the portion of the body (10) during an acquisition period (22) temporally subsequent to the preparation period (21). One or more FID signals (I1) and one or more stimulated echo signals (I2) are acquired during the acquisition period (22). The spatial receive and/or—if applicable—transmit4 sensitivity profiles of at least two RF coils (11, 12, 13) are derived from the acquired FID signals (I1) and/or from the acquired stimulated echo signals (I2). The parameters of the stimulated echo sequence are selected such that it is robust against susceptibility-induced artefacts. Moreover, 10 the invention relates to a MR device (1) and to a computer program for a MR device (1).

Abstract: Medical image system 100 for enabling a user to navigate through three-dimensional [3D] image data showing an anatomical structure by simultaneously displaying a set of views of the 3D image data showing the anatomical structure, the system comprising a data input 140 for receiving orientation data 142, a user input 120 for receiving a navigation command 122 from the user, a plane processor 160 for, in dependence on the navigation command, adjusting a spatial configuration of a set of planes 102 for obtaining a further set of planes 162 intersecting the 3D image data, and a view processor 180 for, in dependence on the further set of planes and the orientation data, establishing a further set of views 182 of the 3D image data for displaying the further set of views as an update of the set of views.

Abstract: Image processing system 100 for enabling a user to navigate through image data having at least three spatial dimensions by displaying views 155 of the image data, the image processing system comprising an image device 110 comprising a display 130 for displaying the views of the image data and an orientation sensor 120 for measuring an orientation of the image device with respect to a reference orientation for providing rotation data 125 indicative of a device rotation of the image device, means 140 for N establishing a center of rotation in the image data, and an image processor 150 for establishing the views of the image data in relation to the device rotation by, for establishing a current view, (i) receiving the rotation data from the orientation sensor, (ii) establishing a view rotation in relation to the device rotation, and (iii) establishing the current view in dependence on the view rotation around the center of rotation with respect to a reference view.

Abstract: A method of acquiring medical image data with at least one region of interest with a predefined freely shaped geometry comprising the following steps: acquiring a first set of medical image data, identifying at least one anatomical landmark in the first set of image data, determining the at least one region of interest with a trained pattern recognition module using the at least one anatomical landmark.

Abstract: A method of acquiring at least one clinical MRI image of a subject comprising the following steps: acquiring a first survey image with a first field of view, the first survey image having a first spatial resolution,—locating a first region of interest and at least one anatomical landmarks in the first survey image, determining the position and the orientation of the first region of interest using the anatomical landmarks, the position and the orientation of the first region being used for—planning a second survey image,—acquiring the second survey image with a second field of view, the second survey image having a second spatial resolution, the second spatial resolution being higher than the first spatial resolution, generating a geometry planning for the anatomical region of interest using the second survey image,—acquiring a diagnostic image of the anatomical region of interest using the geometry planning.

Abstract: Method and apparatus for acquiring diagnostic information comprising:-a data acquisition module for acquiring image data of at least a part of a person's anatomy,-a planning module defining with reference to a spatial position and orientation of an example anatomy at least one series of scanning steps to be executed with the data acquisition module on an actual anatomy,-a user interface to adjust imaging parameters to be used in a selected scanning step of a series of scanning steps, for acquiring image data of that actual anatomy, wherein-the user interface displays for every step of the selected series of scanning steps predefined scanning parameters pertaining to the example anatomy, and-the user interface is arranged to have a user select the actual imaging parameters to be used in each such step of the selected series of scanning steps with reference to a pre-established three-dimensional survey volume of the actual anatomy.

Abstract: A method of acquiring medical image data with at least one region of interest with a predefined freely shaped geometry comprising the following steps: acquiring a first set of medical image data, identifying at least one anatomical landmark in the first set of image data, determining the at least one region of interest with a trained pattern recognition module using the at least one anatomical landmark.

Abstract: A method of acquiring at least one clinical MRI image of a subject comprising the following steps: acquiring a first survey image with a first field of view, the first survey image having a first spatial resolution,—locating a first region of interest and at least one anatomical landmarks in the first survey image, determining the position and the orientation of the first region of interest using the anatomical landmarks, the position and the orientation of the first region being used for—planning a second survey image,—acquiring the second survey image with a second field of view, the second survey image having a second spatial resolution, the second spatial resolution being higher than the first spatial resolution, generating a geometry planning for the anatomical region of interest using the second survey image,—acquiring a diagnostic image of the anatomical region of interest using the geometry planning.