Abstract: A sawing apparatus can have a drive shaft that is rotatable about a central axis for rotationally driving a saw blade. The apparatus includes an electrical rotary feedthrough for the electrically conductive connection of the drive shaft to a connection assembly. The electrical rotary feedthrough includes a first component having a contact section that tapers in the direction of a second component and the shell surface of said contact section forms a first contact surface. The second component has a receiving channel that extends along the central axis and the side surface of the receiving channel forms a second contact surface. The first contact surface lies against the second contact surface in sections. The receiving channel and the tapering contact section has a clearance for ruling out a purely axial abutment of the components. In addition, an electrical rotary feedthrough for a sawing apparatus, is described.

Abstract: A method for representing a blood vessel including a thrombosed section of the blood vessel in a patient is provided. The method includes capturing a first volume data set after administration of a contrast agent, locating a proximal and/or distal end of the thrombosed section of the blood vessel with the aid of the first volume data set, and defining a data capture area for a second volume data set based on the proximal and/or distal end of the thrombosed section of the blood vessel that has been located. The method also includes capturing the second volume data set, segmenting the thrombosed section of the blood vessel from the second volume data set, capturing fluoroscopic images, and superimposing the segmented thrombosed section of the blood vessel with the fluoroscopic images.

Abstract: The invention relates to elements of a method (1) for determining a damage characteristic value of a kidney (2).

Abstract: A method of guiding a catheter during an embolization operation includes receiving volume data of a patient volume, the patient volume including a lesion and a feeding vessel for the lesion, detecting the feeding vessel in the volume data, define a vessel connection path for the feeding vessel, the vessel connection path connecting first and second points in the volume data, the second point being disposed along the feeding vessel, receiving fluoroscopic projection data of the patient volume, and rendering the fluoroscopic projection data with an overlay during the embolization operation, the overlay including the vessel connection path for the feeding vessel.

Abstract: In order to classify a cerebral vascular segment as normal or pathological, a time-series of three dimensional (3D) images representing the cerebral vascular segment is generated. A length of the cerebral vascular segment is determined, and a blood flow speed through the cerebral vascular segment is determined based on the length and the generated time-series of 3D images. The cerebral vascular segment is categorized based on the determined blood flow, and a representation of the cerebral vascular segment is displayed based on the categorization.

Abstract: A method for representing a blood vessel including a thrombosed section of the blood vessel in a patient is provided. The method includes capturing a first volume data set after administration of a contrast agent, locating a proximal and/or distal end of the thrombosed section of the blood vessel with the aid of the first volume data set, and defining a data capture area for a second volume data set based on the proximal and/or distal end of the thrombosed section of the blood vessel that has been located. The method also includes capturing the second volume data set, segmenting the thrombosed section of the blood vessel from the second volume data set, capturing fluoroscopic images, and superimposing the segmented thrombosed section of the blood vessel with the fluoroscopic images.

Abstract: The invention relates to elements of a method (1) for determining a damage characteristic value of a kidney (2).

Abstract: A method for determining a vascularity of an object located in a body is proposed. A multidimensional volume image of a target area of the body including the object is acquired. The object is segmented in the volume image. An expanded volume of the object is calculated by expanding structure edges of a volume of the object in the volume image with a predetermined size. The volume of the object is subtracted from the expanded volume of the object for determining an immediate vicinity of the object. A further object in the volume image having a determined minimum volume in the immediate vicinity of the object is segmented. A number of voxels of the further object is compared with a total number of voxels in the immediate vicinity of the object for determining the vascularity of the object.

Abstract: A method for representing an exposure to radiation of an examination area of an object caused by radiological imaging is proposed. A 3D image of the examination area of the object being examined is acquired. Absorption coefficients of the examination area are determined. The radiation exposure of the examination area caused by radiological imaging is determined and is represented in the 3D image. A termination criterion is queried. The radiation exposure of the examination area is iteratively determined till the termination criterion is fulfilled.

Abstract: A method and a system for determining properties of a vessel in a medical image are provided. The method involves displaying the medical image including the vessel. The displayed vessel is segmented and indicated in the medical image. For an indicated vessel, a maximum curvature along a length of the vessel is determined as the property of the vessel. Another vessel parameter which can be determined is the smallest diameter along the length of the vessel.

Abstract: A method and a system for indicating a feeding vessel of a malformation in a medical image are provided. The method first displays the medical image of the malformation and its surrounding vessels. This enables a manual selects a portion of the displayed medical image with reference to the tumor. The feeding vessel of the tumor is segmented and finally indicated in the medical image based on said manual selection.

Abstract: A system automatically detects objects in an image and automatically displays a chosen object if the object is not currently visible in real time. An image data processing system automatically displays potentially hidden features in 3D (three dimensional) medical image data. A repository includes a 3D (three dimensional) image dataset representing an anatomical volume of interest. An image data processor processes the dataset retrieved from the repository by, (a) automatically detecting if a first object is obscured by a second object in the 3D image dataset, (b) automatically determining if the first object is visible by rotating the anatomical volume of interest and (c) rotating the anatomical volume of interest until the first object is visible in response to a command. A display processor initiates display of the rotated anatomical volume of interest.

Abstract: A method for representing a biological hollow organ is proposed. A 3D data record and a 2D data record are received. The 2D data record includes a part of a medical instrument, which is arranged within the biological hollow organ and has a point which can be detected in the 2D data record. The position of the detectable point is determined in the 2D data record and is transferred into the 3D data record. A subvolume of the 3D data record is determined. The center of gravity of the volume of the subvolume is the specific position of the detectable point in the 3D data record and the dimensions and the alignment of the subvolume can be predetermined. The subvolume of the 3D data record is visualized.

Abstract: A method of guiding a catheter during an embolization operation includes receiving volume data of a patient volume, the patient volume including a lesion and a feeding vessel for the lesion, detecting the feeding vessel in the volume data, define a vessel connection path for the feeding vessel, the vessel connection path connecting first and second points in the volume data, the second point being disposed along the feeding vessel, receiving fluoroscopic projection data of the patient volume, and rendering the fluoroscopic projection data with an overlay during the embolization operation, the overlay including the vessel connection path for the feeding vessel.

Abstract: An image processing system in the medical field is provided. The system for processing image data includes at lest two graphics processors, at least one renderer module for rendering image data and at least one reconstruction module for volume reconstruction. In a first operating mode of the system in which at least one reconstruction module is inactive, the instructions of at least one renderer module is able to be executed by at least two of the graphics processors. In a second operating mode of the system in which at least one reconstruction module is active, the instructions of at least one renderer module and the instructions of at least one reconstruction module is able to be executed separately on different graphics processors of the said graphics processors. During operation in one of the two operating modes, a switch can be made to the other operating mode in each case.

Abstract: Method for the representation of image data from several image data volumes in at least one common image representation on an image display unit connected to a computer, in particular for the representation of medical image data, whereby in the or at least one image representation image data from at least one data volume which are to be assigned or have been assigned to different areas of the image representation are represented by the computer, at least in part, with reciprocally different opacity.

Abstract: A method for visualizing a registration quality of medical image datasets is provided. A reference image and an object image are acquired and registered with each other to form a merged image by a registration method having a non-elastic and an elastic registration method section. A deformation field is determined having displacement vectors from image points of the object image to image points of the reference image which are conditioned by the elastic registration method section. One region of the merged image is overlayed with an overlay into which parameters of the deformation field are fed. The region of the merged image and the overlaid overlay is visualized.

Abstract: A method for representing an exposure to radiation of an examination area of an object caused by radiological imaging is proposed. A 3D image of the examination area of the object being examined is acquired. Absorption coefficients of the examination area are determined. The radiation exposure of the examination area caused by radiological imaging is determined and is represented in the 3D image. A termination criterion is queried. The radiation exposure of the examination area is iteratively determined till the termination criterion is fulfilled.

Abstract: A method for assisting optimum positioning of an occlusion site in a blood vessel in a tumor embolization is provided. Tumors are cut off from the blood supply by the embolization which is an artificial occlusion of blood vessels. The vessels around the tumor and at the same time the planned site for occlusion are firstly determined. A path from the access to the vessels can be determined based on image recognition, and with the aid of this path the site for occlusion can then be optimally determined. A computer system assists the doctor carrying out the treatment by a suitable display.

Abstract: A method for assessing a rupture risk of at least one aneurysm of a patient, with the rupture risk being assessed by a computing device as a function of at least one personal factor specific to the patient and at least one anatomy-linked factor relevant to the anatomy of the and/or in the area of the at least one aneurysm and at least one simulation-linked factor determined with reference to at least one simulation carried out by means of the computing device and/or a further computing device and based on anatomical data for the at least one aneurysm.