Abstract:
The invention relates to a method and a system for the simultaneous reconstruction of the three-dimensional vessel geometry and the flow characteristics in a vessel system. According to one realization of the method, vessel segments (41) of a parametric models are fitted to differently oriented X-ray projections (P l , P k , P N ) of the vessel system that are generated during the passage of a bolus of contrast agent, wherein the fitting takes the imaged contrast agent dynamics and physiological a priori knowledge into account. In an alternative embodiment, the vessel geometry is reconstructed progressively along each vessel, wherein a new segment of a vessel is added based on the continuity of the vessel direction, vessel radius and reconstructed contrast agent dynamics.
Abstract translation:本发明涉及用于同时重建血管系统中的三维血管几何形状和流动特征的方法和系统。 根据该方法的一种实现方式,参数模型的血管段(41)适合于不同取向的X射线投影(P 1 sub>,P k sub>,P
Abstract:
A method and an apparatus for selectively and interactively processing data sets is proposed. A first data set is gathered and a second data set is gathered. A first feature is selected interactively from the first data set. After the selection, the first feature is brought in correspondence with a second feature in the second data set during an identification step. The first feature, the second feature and combinations thereof can be visualized.
Abstract:
It is an object of the invention to provide a more convenient system 40 for visualizing a certain object from a range of viewing angles in a scene comprising a plurality of objects at multiple viewing angles with some of the objects being view-obscuring objects, capable of identifying the view-obscuring objects and adjusting their transparency for obtaining a better view of the certain object comprising the interesting anatomical features. To achieve this object, the invention provides a system comprising segmenting means 41 for segmenting a multidimensional image data set into the plurality of objects, first selecting means 42 for selecting the certain object from the plurality of objects, second selecting means 43 and 44 for selecting a viewing angle from the range of viewing angles, identifying means 45 for identifying a view-obscuring object that obscures the view of the certain object when the certain object is viewed from the viewing angle selected, and transparency adjustment means 45 for changing the transparency of the view-obscuring object identified.
Abstract:
Deformable models are used for the segmentation of structures in 3D images. The basic principle of such methods consists of the adaptation of flexible meshes to the image. However, the simultaneous segmentation of multiple or composed objects often causes problems in that spatial relationships between the objects are violated, or that meshes are intersecting each other. According to the present invention, a priori knowledge about spatial relationships between objects is introduced into the shaped model. This allows to maintain spatial relationships between the objects and to avoid intersecting meshes.
Abstract:
It is proposed by the invention to simulate a deployment of an actual stent at a current position of said stent, wherein the simulation is based on geometrical information extracted from image data received from an imaging device, wherein the image data represent an anatomical structure and the stent relative to the anatomical structure, and on an identified position of the stent. The simulated stent may be visualized together with an X-ray image of the anatomical structure.
Abstract:
The invention relates to a system (100) for segmentation of image data describing an object comprising a first and second object component, the system comprising: a selection unit (120) for selecting a first component model of a plurality of first component models for adapting to the image data in order to delineate the first object component and for selecting a second component model of a plurality of second component models for adapting to the image data in order to delineate the second object component, a connection unit (130) for connecting the first and second component model, an initialization unit (140) for initializing the first and second component model in the image data volume, and an adaptation unit (150) for adapting the first and second component model to the image data, thereby segmenting the image data. Thus, the system (100) of the invention offers a good coverage of object variability, allowing many object models constructed from component models, while each component model is optimized to describe the modeled object component. Consequently, selecting an optimal first and second component model and an optimal way of connecting them improves the flexibility, robustness, and accuracy of the image data segmentation.
Abstract:
It is described a method for medical image comparison purposes, comprising the step of generating a first global image or mask with increased similarity to a second global image, wherein the first global image comprises at least partially a composition of different pre-captured images of a patient; wherein the pre-captured images are captured at different times.
Abstract:
It is disclosed a method and a device for measurement of a flow in an object, especially a lumen or a vessel, comprising: generating a temporal sequence of images of the object; determining reliability maps, whereas a reliability map corresponds to an image of the object. Another exemplary embodiment is a method and a device for calculating flow parameters (13), comprising: comparing (15) of a predicted image of a flow (16) with an image of a flow (17) with respect to a reliability map (18) of an image of the flow; and adaptation (12) of the predicted flow (16) with respect to the result of the comparing (15). Furthermore, it is described a computer program having instructions recorded thereon in order to execute one of the above- mentioned methods.
Abstract:
The present invention relates to a medical interventional system and a corresponding method. To provide an easier user interface also in more complex interventional systems by which the risk of faulty usage can be reduced. A medical interventional system is proposed comprising: - one or more medical instruments (5, 6) each carrying a detectable unique identifier (7) uniquely identifying a medical instrument or a type of medical instrument, - a detection unit (8) for detecting said identifiers (7) and for issuing a detection signal, - a transmitter (10) for transmitting said detection signal to an evaluation unit (13) and - an evaluation unit (13) for evaluating said detection signal.
Abstract:
The invention relates to a system (100) for computing a risk, the risk relating to injuring an anatomical structure by a medical device during a medical procedure, the system comprising: a structure unit (110) for obtaining a position of the anatomical structure; a device unit (120) for obtaining a position of the medical device; and a risk unit (130) for computing the risk relating to injuring the anatomical structure, based on the position of the medical device and the position of the anatomical structure. The system (100) may be used for planning a path of a medical device, which path minimizes said risk, or for monitoring said risk during the medical procedure.