Abstract: The present invention relates to tracking an interventional device. In order to provide a facilitated and simplified real-time tracking of an interventional device, a medical imaging system (10) for tracking an interventional device is provided, that comprises an interface unit (12), and a processing unit (14). The interface unit is configured to provide first image data (18) of a first part of an interventional device, which first part is arranged outside an object. The first image data comprises 3D image data. The interface unit is configured to provide second image data (20) of a second part of the interventional device, which second part is a continuation of the first part, and which second part is arranged inside the object. The second image data comprises 2D image data.

Abstract: An apparatus (130) and a method for adjusting, in perfusion imaging system, a periodic contrast agent injection rate signal (IS) for an injector (135) as function of an image sampling rate determined by the rotational speed of an X-ray source (107)-detector (109) assembly of an X-ray imager (100). Frequency, periodicity and pulse width of the contrast agent injection rate signal (IS) is adjusted to mitigate temporal signal aliasing in a sample of a time attenuation contrast (TAC) signal.

Abstract: An interactive holographic display system includes a holographic generation module configured to display a holographically rendered anatomical image. A localization system is configured to define a monitored space on or around the holographically rendered anatomical image. One or more monitored objects have their position and orientation monitored by the localization system such that coincidence of spatial points between the monitored space and the one or more monitored objects triggers a response in the holographically rendered anatomical image.

Abstract: A patient table usable in an X-ray image acquisition arrangement including a table plate connected to a table base via at least one movable joint. The table plate is movable using at least one actuator. To set or re-establish an accurate position/orientation of the movable table plate, the patient table includes a positioning system including a first sensor arrangement for providing position data of the at least one movable joint and a second sensor arrangement for providing position data of the table plate. The accurate position data provided by the second sensor arrangement may be used in a method for improved three-dimensional roadmapping.

Abstract: The present invention describes a method for rendering and displaying a curved planar reformat (CPR) view (7?) of a blood vessel's 3D tubular structure (1), wherein the viewing direction of the curved planar reformat view (7?) is coupled to the viewing angle on a segmented or raw representation of the 3D tubular structure's rendered voxel volume to be visualized or, alternatively, to the C-arm geometry of a 3D rotational angiography device's C-arm system (6). The proposed method thus enables measurements on the X-ray image which do not suffer from spatial foreshortening and do not need to be calibrated. Thereby, said coupling can be performed bidirectional. According to a first aspect of the proposed method, this means that the viewing direction of the aforementioned curved planar reformat view (7?) follows the viewing angle on a segmented or raw representation of the 3D tubular structure's rendered voxel volume to be visualized, or vice versa.

Abstract: In a method for positioning an X-ray image acquisition device a straight reference plane (30) intersecting a three-dimensional representation of the object, a center point (34) within the intersection of the object, a normal vector (38) to the reference plane and at least one tangential vector (40) within the reference plane are created. Thereafter, the reference plane, the object's frame of reference and the X-ray image acquisition's frame of reference are registered. At least one viewing direction derived from the normal vector (38) and/or at least one tangential vector (40) is defined, wherein the X-ray image acquisition device is adjusted to the geometrical parameters of the X-ray image acquisition device.

Abstract: The present invention relates to the determination of brain deformation. The invention relates in particular to a device for tracking brain deformation, an imaging system for tracking brain deformation, a method for tracking brain deformation, a method of operating a device for tracking brain deformation, as well as to a computer program element and a computer readable medium. For providing enhanced information about the brain deformation, a first 3D representation (112) of a cerebrovascular vessel structure of a region of interest of an object is provided (110) and (114) a second 3D representation (116) of the cerebrovascular vessel structure. Then, at least a part of the first 3D representation is elastically three dimensionally registered (118) with at least a part of the second 3D representation. A deformation field (122) of the cerebrovascular vessel structure is determined (120) based on the elastic registration.

Abstract: The present invention relates to interactive registration of 2D images with 3D volume data, and in particular relates to the registration of two 2D images with 3D volume data.

Abstract: The invention relates to a device and a method for providing a basis for registering a three-dimensional model of an anatomical region with two-dimensional projection images, by deriving a three-dimensional model of an anatomical region at a phase of a periodic signal; deriving two-dimensional projection images of a region which overlaps with the anatomical region re-constructed as the three-dimensional model; pre-5 selecting a subset of projection images out of the derived two-dimensional projection images, which are closest to the phase; and selecting a reference image for the registration from the subset of pre-selected projection images by choosing the projection image with the most contrast.

Abstract: In a medical viewing system having an X-ray image acquisition device a data processing unit is adapted for generating two different views on a three-dimensional image set, wherein a first view is corresponding to the viewing direction of the X-ray image acquisition device and a second view has a rotational offset to the first viewing direction. The first view may include live X-ray images, e.g. for monitoring a stent placement. The second view 10 supports a clinician to unambiguously judge whether ostia connection points may be blocked that are not clearly visible in anterior-posterior images.

Abstract: A patient table (1) usable in an X-ray image acquisition arrangement (100) is proposed. The patient table (1) comprises a table plate (3) being connected to a table base (5) via at least one movable joint (9), wherein the table plate (3) is movable using at least one actuator (11). In order to set or re-establish an accurate position/orientation of the movable table plate (3), the patient table comprises a positioning system including a first sensor arrangement (15) for providing position data of the at least one movable joint (9) and a second sensor arrangement (17) for providing position data of the table plate (3), e.g. by tracking at least one marker (21) attached to the table plate (3). Using such patient table (1) may allow for accurately automatically positioning the table plate (3). Furthermore, the accurate position data provided by the second sensor arrangement (17) may be used in a method for improved three-dimensional roadmapping.

Abstract: In a method for positioning an X-ray image acquisition device a straight reference plane (30) intersecting a three-dimensional representation of the object, a center point (34) within the intersection of the object, a normal vector (38) to the reference plane and at least one tangential vector (40) within the reference plane are created. Thereafter, the reference plane, the object's frame of reference and the X-ray image acquisition's frame of reference are registered. At least one viewing direction derived from the normal vector (38) and/or at least one tangential vector (40) is defined, wherein the X-ray image acquisition device is adjusted to the geometrical parameters of the X-ray image acquisition device.

Abstract: A Method and system for visualising information by combining 3DRA with diagnostic data like regular CT or MR, and colorized physiologic data like perfusion or functional data to obtain a plurality of volumes obtained from the same patient. These volumes may be a 3DRA volume, a regular greyscale CT or MR volume and a colorized physiologic parameter like a perfusion CT, a perfusion MR or a functional MR volume. Then, an anatomic structure like a vessel is segmented from the 3DRA volume, a slab out of the regular CT or MR data is rendered through the segmented vessel, and a slice out of the colorized volume of the perfusion or functional data is rendered on top of the slab.

Abstract: The invention relates to a device and a method for providing a basis for registering a three-dimensional model of an anatomical region with two-dimensional projection images, by deriving a three-dimensional model of an anatomical region at a phase of a periodic signal; deriving two-dimensional projection images of a region which overlaps with the anatomical region re-constructed as the three-dimensional model; pre-5 selecting a subset of projection images out of the derived two-dimensional projection images, which are closest to the phase; and selecting a reference image for the registration from the subset of pre-selected projection images by choosing the projection image with the most contrast.

Abstract: Automated Vessel Analysis (AVA) allows qualitative and quantitative feedback to the user, regarding vessel pathologies (such as stenosis), with a minimum of user input. However, present algorithms may be unsuitable for large datasets, especially because of the rather long pre-processing time. Here an imaging method for placing probes on the vessel tree is presented that does not require any pre-processing time at 5 all, and performs very well on (very) large datasets, both in terms of speed and memory consumption. The method comprises the steps: classifying voxels of a 3D data volume as voxels of the first, the second or further types, determining a starting voxel in a tubular structure of voxels of the first type, determining the centre line in the proximity of the starting voxel, and fitting a plane through the starting voxel, perpendicular to the 10 centre line.

Abstract: A Method and system for visualising information by combining 3DRA with diagnostic data like regular CT or MR, and colourised physiologic data like perfusion or functional data to obtain a plurality of volumes obtained from the same patient. These volumes may be a 3DRA volume, a regular greyscale CT or MR volume and a colourised physiologic parameter like a perfusion CT, a perfusion MR or a functional MR volume. Then, an anatomic structure like a vessel is segmented from the 3DRA volume, a slab out of the regular CT or MR data is rendered through the segmented vessel, and a slice out of the colourised volume of the perfusion or functional data is rendered on top of the slab.

Abstract: The present invention describes a method for rendering and displaying a curved planar reformat (CPR) view (7?) of a blood vessel's 3D tubular structure (1), wherein the viewing direction of the curved planar reformat view (7?) is coupled to the viewing angle on a segmented or raw representation of the 3D tubular structure's rendered voxel volume to be visualized or, alternatively, to the C-arm geometry of a 3D rotational angiography device's C-arm system (6). The proposed method thus enables measurements on the X-ray image which do not suffer from spatial foreshortening and do not need to be calibrated. Thereby, said coupling can be performed bidirectional. According to a first aspect of the proposed method, this means that the viewing direction of the aforementioned curved planar reformat view (7?) follows the viewing angle on a segmented or raw representation of the 3D tubular structure's rendered voxel volume to be visualized, or vice versa.

Abstract: It is described a method for determining and assessing the tissue surrounding an object being inserted into a patient. The method comprises acquiring a first dataset representing a first 3D image of the patient, acquiring a second dataset representing a second 3D image of the blood vessel structure of the patient and acquiring a third dataset representing a 2D image of the patient including the object. The method further comprises recognizing the object within the 2D image, registering two of the three datasets with each other, whereby the object is back-projected in the blood vessel structure, in order to generate a first combined dataset, and registering the first combined dataset with the remaining dataset in order to generate a second combined dataset representing a further image surrounding the object. The method allows for combining diagnostic scanning such as CT, 3D RA and real-time 2D fluoroscopy.