Abstract: A concept for facilitating a user interface for interacting with interventional medical devices depicted in an image. The positions of one or more features of at least one interventional medical device are identified. A size and shape of an interactive zone is determined for each feature, where an interactive zone (when provided on a display of a user interface) facilitates interaction with the corresponding feature and/or interventional medical device. The size of the interactive zone is chosen to be larger than the size of the feature. A position for the interactive zone is selected based on the position/position of the corresponding feature in the image. Zone information is then output to define the size, shape and position of the interactive zones with respect to the image.

Abstract: The invention relates to a visualization system (10) for visualizing an accuracy of an alignment of a position and shape of an instrument (33), which has been determined by a position and shape determination device (9), with an image of the instrument. The accuracy is determined for different regions of the instrument as defined by the position and shape and of the image, wherein among these regions at least one region is determined, in which the determined accuracy indicates that it is insufficient. A visualization is then generated in which the determined region is indicated on a representation of the position and shape and/or the image. This visualization guides a user's eyes to the region which should not be missed, while deciding whether, for instance, a navigation of the instrument during a subsequent interventional procedure should be based on this alignment, which in turn allows for an improved navigation accuracy.

Abstract: An OSS foreshortening detection system employing an interventional device (40) including a OSS sensor (20) having shape nodes for generating shape sensing data informative of a shape of OSS sensor (20). The system further employs a OSS foreshortening detection device (80) including a OSS shape controller (90) for reconstructing a shape of a portion/entirety of interventional device (40) derived from a generation of the shape sensing data by OSS sensor (20). Device (80) further includes a OSS foreshortening controller (100) for monitoring any foreshortening of the interventional device (40) within an image of the interventional device (40) including the OSS foreshortening controller (100) detecting a location of any occurrence of a foreshortening of the interventional device (40) within the image of interventional device (40) derived from the reconstruction of the shape of the portion/entirety of interventional device (40) by the OSS shape controller (90).

Abstract: The invention relates to an assessing device (13) for assessing the suitability of a shape of an instrument like a guidewire for a registration of a position and shape determination device (10) like an optical shape sensing device with an imaging device (2). Curvature values being indicative of the curvature at several positions along the instrument are determined, which are used for determining shape feature values. These shape feature values are then used for determining a suitability value being indicative of the suitability of the shape of the instrument for the registration procedure, wherein an output is provided to a user based on the determined suitability value. The user can therefore modify the shape until the output indicates that the shape of the instrument is suitable for the registration, without requiring any image. This can reduce a radiation dose if the image is, for instance, an x-ray image.

Abstract: A system and method for determining the length of a non-shape-sensed interventional device (102) which includes a shape-sensed guidewire (106) that is received in the lumen (103) of the device. A hub (107) is configured to secure a position of the shape-sensed guidewire and interventional device. A registration module (124) is configured to register a position of the distal tip (117) of the non-shape-sensed interventional device to a position of the shape-sensed guidewire. A determination module (126) determines the length of the non-shape-sensed interventional device using a known position of the device in the hub and the position of the distal tip of the device. The system includes a detection module (146) that receives curvature data from the shape-sensed guidewire and is configured to determine the state of the shape-sensed guidewire with respect to an interventional device.

Abstract: A method is provided for segmenting an image of a region of interest of a subject. The method includes receiving training images, at least some of which include a training interventional device; constructing ground truth data, including at least a ground truth image, for each training image; training a segmentation model using the training images based on intensity and vesselness features in the training images and the associated ground truth images; acquiring a new test image showing the region of interest; extracting vesselness values of pixels or voxels from the new test image; dividing the new test image into multiple patches; and performing segmentation of the new test image using the trained segmentation model to generate a segmentation image, corresponding to the new test image, with values indicating for each pixel or voxel in the segmentation image a presence or an absence of an interventional device.

Abstract: An OSS foreshortening detection system employing an interventional device (40) including a OSS sensor (20) having shape nodes for generating shape sensing data informative of a shape of OSS sensor (20). The system further employs a OSS foreshortening detection device (80) including a OSS shape controller (90) for reconstructing a shape of a portion/entirety of interventional device (40) derived from a generation of the shape sensing data by OSS sensor (20). Device (80) further includes a OSS foreshortening controller (100) for monitoring any foreshortening of the interventional device (40) within an image of the interventional device (40) including the OSS foreshortening controller (100) detecting a location of any occurrence of a foreshortening of the interventional device (40) within the image of interventional device (40) derived from the reconstruction of the shape of the portion/entirety of interventional device (40) by the OSS shape controller (90).

Abstract: An image processing device (400), comprising an image input interface (402) configured to receive input pixel values allocated to pixels in a two-dimensional pixel grid, a marker input interface (404) configured to receive marker position data indicative of a position of a marker within the pixel grid, and a marker position refining unit (406) configured to identify, using the pixel data and the marker position data, a target pixel having a highest symmetry value, i.e. identification value, which has been determined based on weighed symmetry values of the pixels within a search region that includes the marker position, and to determine a refined marker position data as the position data of the target pixel.

Abstract: The invention relates to an assessing device (13) for assessing the suitability of a shape of an instrument like a guidewire for a registration of a position and shape determination device (10) like an optical shape sensing device with an imaging device (2). Curvature values being indicative of the curvature at several positions along the instrument are determined, which are used for determining shape feature values. These shape feature values are then used for determining a suitability value being indicative of the suitability of the shape of the instrument for the registration procedure, wherein an output is provided to a user based on the determined suitability value. The user can therefore modify the shape until the output indicates that the shape of the instrument is suitable for the registration, without requiring any image. This can reduce a radiation dose if the image is, for instance, an x-ray image.

Abstract: The invention relates to a visualization system (10) for visualizing an accuracy of an alignment of a position and shape of an instrument (33), which has been determined by a position and shape determination device (9), with an image of the instrument. The accuracy is determined for different regions of the instrument as defined by the position and shape and of the image, wherein among these regions at least one region is determined, in which the determined accuracy indicates that it is insufficient. A visualization is then generated in which the determined region is indicated on a representation of the position and shape and/or the image. This visualization guides a user's eyes to the region which should not be missed, while deciding whether, for instance, a navigation of the instrument during a subsequent interventional procedure should be based on this alignment, which in turn allows for an improved navigation accuracy.

Abstract: The invention relates to a registration system (13) for registering an optical shape system to an imaging system with an imaging device (2) like a radiation C-arm device with a tracking device (4) like an optical shape sensing tracking device. One or more optical cameras (27) are used to detect position information of a tracked object to register the shape coordinate system with that of the imaging system. The optical cameras are pre-calibrated with the imaging system, so that the detected position information in the camera system can directly be translated to the imaging system.

Abstract: The invention relates to a registration system (13) for registering an imaging device (2) like an x-ray C-arm device with a tracking device (4) like an optical shape sensing tracking device. An object detection unit (5) is adapted to a) allow a user to add markers to an image of an object for indicating arbitrary positions on the object and b) provide a representation of the object based on the added markers, wherein a registration unit (6) determines registration parameters based on a location of the object tracked by the tracking device and on the location of the representation. This kind of registration can be performed with any object being visible for the user in the image, thereby permitting to use a wide variety of objects for the registration.

Abstract: An image processing device (400), comprising an image input interface (402) configured to receive input pixel values allocated to pixels in a two-dimensional pixel grid, a marker input interface (404) configured to receive marker position data indicative of a position of a marker within the pixel grid, and a marker position refining unit (406) configured to identify, using the pixel data and the marker position data, a target pixel having a highest symmetry value, i.e. identification value, which has been determined based on weighed symmetry values of the pixels within a search region that includes the marker position, and to determine a refined marker position data as the position data of the target pixel.

Abstract: A monitoring system (10) includes at least one video camera (14), a motion unit (40), and a segmentation unit (42). The at least one video camera (14) is configured to continuously receive video of a subject in normal and darkened room conditions. The motion unit (40) identifies clusters of motion of the subject based on respiratory and body part motion in the received video of the subject. The segmentation unit (42) segments body parts of the subject based on the identified clusters of subject motion.

Abstract: The invention relates to a positions determination apparatus for determining positions, at which an interventional instrument (3) is located, in a projection image. An input unit (16) allows a user to indicate the position of a tip (23) of the interventional instrument (3) in the projection image, wherein the positions, at which the interventional instrument is located, in the projection image are determined based on the projection image, the indicated tip position and a three-dimensional representation of the interventional instrument, which is defined by its position and shape as determined by a tracking device like an OSS device. By using the projection image, the indicated tip position and the representation the positions in the projection image, at which the interventional instrument is located, can be determined very accurately. Based on these determined positions the projection device and the tracking device can be very accurately registered to each other.

Abstract: A system and method for determining the length of a non-shape-sensed interventional device (102) which includes a shape-sensed guidewire (106) that is received in the lumen (103) of the device. A hub (107) is configured to secure a position of the shape-sensed guidewire and interventional device. A registration module (124) is configured to register a position of the distal tip (117) of the non-shape-sensed interventional device to a position of the shape-sensed guidewire. A determination module (126) determines the length of the non-shape-sensed interventional device using a known position of the device in the hub and the position of the distal tip of the device. The system includes a detection module (146) that receives curvature data from the shape-sensed guidewire and is configured to determine the state of the shape-sensed guidewire with respect to an interventional device.

Abstract: The invention relates to a positions determination apparatus for determining positions, at which an interventional instrument (3) is located, in a projection image. An input unit (16) allows a user to indicate the position of a tip (23) of the interventional instrument (3) in the projection image, wherein the positions, at which the interventional instrument is located, in the projection image are determined based on the projection image, the indicated tip position and a three-dimensional representation of the interventional instrument, which is defined by its position and shape as determined by a tracking device like an OSS device. By using the projection image, the indicated tip position and the representation the positions in the projection image, at which the interventional instrument is located, can be determined very accurately. Based on these determined positions the projection device and the tracking device can be very accurately registered to each other.

Abstract: The invention relates to a method, a system (101) and a computer program product to identify a particular data object of a data type in a database (104) that comprises data objects of the data type. The system (101) comprises a query composition unit (102) to compose a search query to identify a candidate data object being a candidate for the particular data object. A search unit (103) identifies the candidate data object in the database (104) based on the search query. A presentation unit (105) presents the candidate data object to the user. A feedback receiving unit (106) receives user feedback on the relevance or irrelevance of a segment of the candidate data object. The search unit (103) further identifies an improved candidate data object in response to the received user feedback. The improved candidate data object is an improved candidate for the particular data object.

Abstract: The invention relates to a method for determining at least one applicable path (32) for the movement of an object, especially of a surgical and/or diagnostical device, in human tissue (14) or animal tissue by means of a data set of intensity data obtained by a 3D imaging technique, the applicable path (32) of movement connecting a starting position (28) of the device with a defined target location (30).

Abstract: A system (100) includes a retrieval unit (110) for retrieving an image from the storage of images, on the basis of the similarity of images from the storage of images to a query image. The similarity is defined by means of a similarity function. A relevance unit (120) computes the relevance of a first portion of the retrieved image to a respective first portion of the query image and of a second portion of the retrieved image to the respective second portion of the query image. A visualization unit (130) visualizes the relevance of the first and second portion of the retrieved image to the respective first and second portion of the query image. The relevance of the first and second portion of the retrieved image to the respective first and second portion of the query image is computed using a first and second relevance function. The computed values of the relevance are visualized, e.g. using a color coding and coloring the first and second portion of each retrieved image.