摘要:
A system and corresponding method for organ wall analysis are provided, the system including a processor, an imaging adapter in signal communication with the processor for receiving organ scan data indicative of an organ, a distance mapping unit in signal communication with the processor for providing a three-dimensional distance map of a segmented outer surface of an organ, and a ray-casting unit in signal communication with the processor for providing a maximum intensity projection substantially normal to the segmented outer surface for each of a plurality of rays, and for forming a ray collection by casting each of the plurality of rays from a center of the organ through the respective maximum intensity projection to the segmented outer surface; and the corresponding method including providing a three-dimensional distance map of a segmented outer surface of an organ, providing a maximum intensity projection substantially normal to the segmented outer surface for each of a plurality of rays, and forming a ray collection by casting each of the plurality of rays from a center of the organ through the respective MIP to the segmented outer surface.
摘要:
Disclosed is a method and apparatus for generating a two dimensional (2D) image of a structure (e.g., an organ) that has at least one pixel corresponding to at least one voxel of a three dimensional (3D) image of the structure. First, the surface of the structure in the 3D image is modeled by a geometrical volume such as an ellipsoid. Next, normal maximum intensity projection (MIP) rays are cast (i.e., projected) for voxels of the geometrical volume. The 2D image is then generated using the rays. The 2D image has at least one pixel that corresponds to at least one voxel of the 3D image.
摘要:
The monitoring system for a gas turbine engine including a viewing tube assembly having an inner end and an outer end. The inner end is located adjacent to a hot gas flow path within the gas turbine engine and the outer end is located adjacent to an outer casing of the gas turbine engine. An aperture wall is located at the inner end of the viewing tube assembly and an optical element is located within the viewing tube assembly adjacent to the inner end and is spaced from the aperture wall to define a cooling and purge chamber therebetween. An aperture is defined in the aperture wall for passage of light from the hot gas flow path to the optical element. Swirl passages are defined in the viewing tube assembly between the aperture wall and the optical element for passage of cooling air from a location outside the viewing tube assembly into the chamber, wherein swirl passages effect a swirling movement of air in a circumferential direction within the chamber.
摘要:
A method of segmenting tubular structures in digital images includes selecting a point in an image of a tubular object to be segmented, defining an initial state of the selected point, initializing measurement weights, a conditional probability distribution and a prior probability distribution of a feature space of the initial state, sampling the feature space from the prior probability distribution, estimating a posterior probability distribution by summing sample measurements weighted by the measurement weights, and segmenting a cross section of the tubular object from the posterior probability distribution.
摘要:
An automatic trash pickup assembly which may be attached to a forward portion of a vehicle such as a trash truck for use in picking up and conveying to a rear portion of the truck, trash, refuse, and the like, which may be packed in any disposable container. An inclined elevating conveyor assembly is attached to the vehicle at one point through a ball and socket assembly and to the front of the vehicle by a sliding bar and sleeve. A fully floating reel is carried above the forward end of the conveyor and is structured to move up or down in response to the size of the trash encountered. A revolving underroller, having extending and retracting cleats, is affixed to the forward end of the conveyor and counterrotates with the floating reel. The conveyor assembly is laterally movable from a position extending directly in front of the vehicle to a position wherein the conveyor swings outboard of the vehicle to remove trash from the sidewalk or curb adjacent the roadway. The attachment of the conveyor assembly to the vehicle allows such sideways movement without subjecting the inclined conveyor assembly to twist or tilt. Further, apparatus is provided for automatically changing the elevation of the forward end of the conveyor in response to changes in height of the surface from which the trash is to be removed.
摘要:
A telemetry system for use in a combustion turbine engine (10) having a compressor (12), a combustor and a turbine (16) and includes a sensor (118) in connection with a turbine blade (111) or vane (23). A transmitter assembly (117) includes a telemetry transmitter circuit/transceiver may be affixed on a turbine blade (111) or seal plate (115) proximate the turbine blade with a first connecting material (119) deposited on the turbine blade (111) for routing electronic data signals, indicative of a condition of the turbine blade (111), from the sensor (118) to the telemetry transmitter circuit/transceiver. An induction power system for powering the telemetry transmitter circuit/transceiver may include a rotating data antenna (116) affixed to the seal plate (115) with an electrical connection (122) between the telemetry transmitting circuit/transceiver for routing electronic data signals from the telemetry transmitter circuit/transceiver to the rotating data antenna (119).
摘要:
A method of segmenting tubular structures in digital images comprises providing a digitized image, selecting a point within an object for segmenting in the image, defining an initial state of the selected point in the object, performing an initial segmentation of a 2D cross section of the object based on the initial state, predicting a new state of said object about a new point that is a translation of said selected point along the object tangent, correcting said new state prediction based on a measurement of said new point in said image, and segmenting a 2D cross section of said object based on said new state.
摘要:
An inspection system formed at least from a viewing tube for inspecting aspects of a turbine engine during operation of the turbine engine. An outer housing of the viewing tube may be positioned within a turbine engine using at least one bearing configured to fit into an indentation of a support housing to form a ball and socket joint enabling the viewing tube to move during operation as a result of vibrations and other movements. The viewing tube may also include one or more lenses positioned within the viewing tube for viewing the turbine components. The lenses may be kept free of contamination by maintaining a higher pressure in the viewing tube than a pressure outside of the viewing tube and enabling gases to pass through an aperture in a cap at a viewing end of the viewing tube.
摘要:
An apparatus, method and program storage device are provided for co-registration of multi-modal images in a three-dimensional environment, where the apparatus includes a source of excitation light, an electromagnetic-ray source disposed relative to the source of excitation light, an electromagnetic-ray transparent mirror having a first surface disposed towards the excitation light and a second surface disposed towards the electromagnetic-ray source, a target location disposed towards the first surface of the electromagnetic-ray transparent mirror for locating a target and receiving the excitation light and the electromagnetic rays, an electromagnetic-ray detector disposed on an opposite side of the target location relative to the electromagnetic-ray transparent mirror for detecting electromagnetic-rays transmitted through the target, a second electromagnetic-ray transparent mirror having a light-reflective surface disposed towards the target location, and a light detector disposed towards the light-reflective surface of the second electromagnetic-ray transparent mirror for detecting light from the target.
摘要:
In an optical probe (10) having an inner tube (30) arranged to house one or more optical elements (32), a method is provided which allows constructing the inner tube to have at least two corresponding inner tube sections (32, 34) separable from one another along a longitudinal axis of the inner tube. While corresponding inner tube sections (32, 34) are detached from one another, one or more of the optical elements may be disposed into either of the inner tube sections. The inner tube sections may be attached to one another by way of at least one removable affixing element to facilitate servicing of the probe.