Patent application number | Description | Published |
20080230709 | ENERGY DISCRIMINATING DETECTOR DIFFERENT MATERIALS DIRECT CONVERSION LAYERS - A diagnostic imaging system includes a high frequency electromagnetic energy source that emits a beam of high frequency electromagnetic energy toward an object to be imaged. An energy discriminating (ED) detector receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source. The ED detector includes a first direct conversion layer and a second direct conversion layer. The first direct conversion layer comprises a first direct conversion material and the second direct conversion layer comprises a second direct conversion material that is different from the first direct conversion material. A data acquisition system (DAS) is operably connected to the ED detector and a computer operably connected to the DAS. | 09-25-2008 |
20090052612 | SYSTEM AND METHOD OF OPTIMIZING A MONOCHROMATIC REPRESENTATION OF BASIS MATERIAL DECOMPOSED CT IMAGES - A system and method of a diagnostic imaging system includes a high frequency electromagnetic energy source that emits a beam of high frequency electromagnetic energy toward an object to be imaged, a detector that receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source and attenuated by the object, a data acquisition system (DAS) operably connected to the detector, and a computer operably connected to the DAS. The computer is programmed to obtain CT scan data with two or more incident energy spectra, decompose the obtained CT scan data into projection CT data of two or more basis materials, reconstruct linearly weighted projections of the two or more basis materials, determine an optimized energy for the two or more basis materials within a region-of-interest (ROI), and form a monochromatic image of the projection CT data at the optimized energy using the two or more basis material projections. | 02-26-2009 |
20090092219 | METHOD AND APPARATUS FOR PERFORMING DUAL-SPECTRUM CT WITH FAST KV MODULATION AT MULTIPLE-VIEW INTERVALS - A CT system includes a rotatable gantry having an opening for receiving a subject to be scanned, a rotatable gantry having an opening for receiving a subject to be scanned, an x-ray source configured to project x-rays having multiple energies toward the subject, and a generator configured to energize the x-ray source to a first voltage and configured to energize the x-ray source to a second voltage, the first voltage distinct from the second voltage. The system further includes a controller configured to cause the generator to energize the x-ray source to the first voltage for a first duration, acquire imaging data for at least one view during at least the first duration, after the first duration, cause the generator to energize the x-ray source to the second voltage for a second duration, and acquire imaging data for two or more views during at least the second duration. | 04-09-2009 |
Patent application number | Description | Published |
20090161814 | METHOD FOR CALIBRATING A DUAL -SPECTRAL COMPUTED TOMOGRAPHY (CT) SYSTEM - A method for calibrating and reconstructing material density images in a dual-spectral computed tomography (CT) system | 06-25-2009 |
20090214095 | SYSTEM AND METHOD TO OBTAIN NOISE MITIGTED MONOCHROMATIC REPRESENTATION FOR VARYING ENERGY LEVEL - In dual energy CT, through basis material decomposition (BMD), a pair of density images can be reconstructed. The noises in this image pair are negatively correlated due to the BMD process. A technique is presented for obtaining the monochromatic images at desired energy levels with reduced correlation noise. The technique includes obtaining a plurality of optimum attenuation coefficients for an energy level, selecting a desired energy level, obtaining a plurality of desired attenuation coefficients for the desired energy level, computing a scaling factor for a corresponding noise component based on the optimum attenuation coefficients and the desired attenuation coefficients, and generating a monochromatic image based upon the scaling factor. | 08-27-2009 |
20100020921 | SYSTEM AND METHOD FOR GENERATING COMPUTED TOMOGRAPHY IMAGES - A computed tomographic imaging system is provided for generating computed tomography images. The computed tomographic system includes a processor configured to access image data encoding X-ray projections at a detector position and a plurality of X-ray source beam focal spot positions and to align pixel values for the projections in a direction of deviation of the positions. The processor is also configured to determine a correction factor for at least one of the projections based upon the aligned pixel values and upon a sum of the projections and to correct the pixel values for the at least one of the projections based upon the correction factor. | 01-28-2010 |
20110026668 | Apparatus and Method for Voltage Modulation in X-Ray Computed Tomography - The present invention discloses a computed tomography imager comprising: an x-ray source disposed in a gantry; a detector assembly for receiving an x-ray emission from an x-ray source, the x-ray source and the detector assembly rotatable about an imaging target; an imager control system for selectively modulating a kVp operating value in the x-ray source during a scan slice in accordance with an x-ray modulation software program; and a computer for receiving data from the detector assembly, and for providing control signals to the imager control system by executing the x-ray modulation software program for at least a portion of the total possible rotational scanning range of the x-ray source. | 02-03-2011 |
20150182179 | SYSTEMS AND METHODS FOR INCREASED ENERGY SEPARATION IN MULTI-ENERGY X-RAY IMAGING - A multi-energy X-ray imaging system includes an X-ray source and an X-ray detector. A filtering device includes an X-ray translucent substrate having a plurality of septa disposed therein at a plurality of fixed positions with respect to the substrate. A controller is programmed to acquire a first set of projection data at a first energy spectrum by controlling the X-ray source to emit the X-rays at the first energy spectrum and controlling the position of the filtering device to focally align the plurality of septa with the X-ray beam emitted from the focal spot, and to acquire a second set of projection data at a second energy spectrum with a mean energy greater than the mean energy of the first energy spectrum by controlling the X-ray source to emit the X-rays at the second energy spectrum and controlling a change in the position of the filtering device to focally misalign the plurality of septa with the X-ray beam emitted from the focal spot. | 07-02-2015 |
Patent application number | Description | Published |
20100124616 | METHOD OF FORMING AN ABRADABLE COATING - A method of forming a coating comprises depositing a first coating layer on a surface of a substrate, wherein the coating comprises a ceramic or metal, a lubricant, and a fugitive material. At least a portion of the fugitive material is decomposed, transformed or volatized by heating the first coating layer with a localized heat source. | 05-20-2010 |
20140147242 | SEAL SYSTEMS FOR USE IN TURBOMACHINES AND METHODS OF FABRICATING THE SAME - A seal system, for an apparatus that includes a rotatable portion with airfoils coupled thereto and a stationary portion with an inner surface, includes an abradable portion including at least one abradable layer of an abradable material formed over the inner surface. The seal system also includes an abrading portion disposed over at least a portion of a substrate of the airfoil. The abrading portion includes at least one abrading layer formed on at least a portion of the substrate and a plurality of abrasive particles embedded within the abrading layer. The plurality of abrasive particles includes at least one of substantially all of one of tantalum carbide (TaC), aluminum oxide (Al | 05-29-2014 |
20140178641 | METHODS OF COATING A SURFACE AND ARTICLES WITH COATED SURFACE - A method of coating a surface is provided. The method comprises feeding a feedstock to a thermal spray torch, the feedstock comprising a liquid, disposing the feedstock on a substrate by thermal spray under conditions selected to produce a textured surface comprising a hierarchical structure, wherein the hierarchical structure comprises agglomerations of at least partially melted and solidified particles derived from the feedstock with individual at least partially melted and solidified particles derived from the feedstock disposed on a surface of the agglomerations; and applying a surface energy modification material over the textured surface. An article comprising a component having a coated surface is also provided. | 06-26-2014 |
20150083227 | REDUCED FLUID DRAG ACROSS A SOLID SURFACE WITH A TEXTURED COATING - An article includes a substrate with a coating having asperities such that an average spacing between the asperities is between about 0.01 and about 1.5 micron. An average surface roughness of the coating is up to about 2 microns, and an average porosity of the coating is in the range from about 35% to about 70%. A material to reduce surface energy is disposed on the coating. A method for making such an article and a method for decreasing fluid drag across such an article are also provided. | 03-26-2015 |
20150114903 | ARTICLE AND APPARATUS FOR ENHANCING THE COALESCENCE OF A DISPERSED PHASE FROM A CONTINUOUS PHASE IN AN EMULSION - An apparatus for enhancing the coalescence of a dispersed phase from a continuous phase in an emulsion is presented. The apparatus includes at least one inlet for receiving the emulsion, at least one outlet for discharging the emulsion after coalescing the dispersed phase, and at least one article disposed between the inlet and the outlet. The article includes a plurality of regions disposed on a surface in a predefined pattern, wherein a portion of the plurality of regions is substantially wetting with respect to the dispersed phase, and a portion of the plurality of regions is substantially non-wetting with respect to the dispersed phase, and wherein the pattern includes a plurality of inter-connected regions that are substantially non-wetting with respect to the dispersed phase. A related article is also presented. | 04-30-2015 |
20150118414 | METHOD FOR MANUFACTURING AN ARTICLE - A method for manufacturing an article configured to enhance the coalescence of a dispersed phase from a continuous phase in an emulsion is presented. The method includes forming a pattern of a plurality of regions on a surface of the article, wherein a portion of the plurality of regions is substantially wetting with respect to the dispersed phase, and a portion of the plurality of regions is substantially non-wetting with respect to the dispersed phase. The pattern further includes a plurality of inter-connected regions that are substantially non-wetting with respect to the dispersed phase. | 04-30-2015 |
20150147479 | METHODS FOR THE FORMATION OF COOLING CHANNELS, AND RELATED ARTICLES OF MANUFACTURE - A method for the formation of channels on a metallic substrate is described. The method includes the steps of applying at least one layer of a metallic coating material onto a surface of the substrate by a cold spray technique, so as to define boundary walls for the channels, and to build the boundary walls to a desired height. Additional coating material is then applied on one or more surfaces of the boundary walls by the cold spray technique, so as to modify the shape of the channels. The substrate can be any type of high-temperature component or hot gas path component. In some instances, the substrate is a gas turbine engine wall. | 05-28-2015 |
20150354392 | ABRADABLE COATINGS - Turbine shroud abradable coatings that balance the apparently contradictory requirements of high flowpath solidity, low blade tip wear, and good durability in service. The shrouds include a shroud substrate, a coating system, and an abradable coating. The coating system overlies at least a portion of an outer surface of the shroud substrate. The coating system includes a bond coat, a thermal barrier coating (TBC), and/or an environmental barrier coating (EBC). The abradable coating overlies at least a portion of the barrier coating. The abradable coating defines a substantially smooth continuous flowpath surface. The abradable coating includes a hybrid microstructure including a relatively dense, high-durability phase corralling relatively porous abradable phases. The second phases are relatively more abradable by the blades of a turbine than the second regions. | 12-10-2015 |
20150354393 | METHODS OF MANUFACTURING A SHROUD ABRADABLE COATING - Methods of manufacturing turbine shrouds with an abradable coating that balance the apparently contradictory requirements of high flowpath solidity, low blade tip wear, and good durability in service. The methods include obtaining a shroud substrate. The methods may include obtaining a coating system on the shroud substrate. The methods include forming an abradable coating on a surface of the coating system so as to form a substantially smooth flowpath surface. Forming the abradable coating includes forming a relatively dense scaffold and relatively porous filler regions in-between the relatively dense abradable scaffold. The methods may also include machining the abradable so as to achieve a substantially smooth flowpath surface comprising a relatively porous abradable phase surrounded by a relatively dense, high-durability corrale phase. | 12-10-2015 |
20160084102 | ABRADABLE SEAL AND METHOD FOR FORMING AN ABRADABLE SEAL - An abradable seal having a metallic substrate and a multi-layered ceramic coating on the metallic substrate. The multi-layered ceramic coating includes a base layer deposited on the metallic substrate, an abradable layer overlaying the first layer, and an abrading layer overlaying the second layer. The abrading layer is formed of an abrading material. A turbine system and a method for forming an abradable seal are also disclosed. | 03-24-2016 |
20160108510 | COMPOSITIONS AND METHODS FOR THERMAL SPRAYING A HERMETIC RARE EARTH ENVIRONMENTAL BARRIER COATING - A rare earth silicate-based hermetic layer includes a thermal sprayed coating including a rare earth silicate having a hermetic microstructure. An environmental barrier coating includes a bond coat layer including silicon; and at least one rare earth silicate-based hermetic layer deposited on the bond coat layer by thermal spraying. The rare earth silicate-based hermetic layer includes a thermal sprayed coating including a rare earth silicate having a hermetic microstructure. An article for service in extreme environments may be provided with such an environmental barrier coating. A thermal spray feedstock for producing a rare earth silicate-based hermetic layer. | 04-21-2016 |
Patent application number | Description | Published |
20080198366 | Apparatus for measuring defects in a glass sheet - A method of measuring the topography of a large, thin, non-flat specular substrate in a production environment with minimal movement of a majority of the measurement apparatus. A gimbal-mounted reflecting element is used to steer a short coherence length probe beam such that the probe beam is substantially perpendicular to a local surface of the substrate. The probe beam and the reference beam are combined and the resulting interference pattern used to characterize defects on the local surface. | 08-21-2008 |
20080297784 | Inspection technique for transparent substrates - A method for inspecting a transparent substrate provides an index-matching fluid between an index-matched optical coupler and a surface of the transparent substrate. The method repeats, at two or more positions along the surface of the transparent substrate, steps of illuminating an inspection volume within the transparent substrate by directing a ribbon of light through the optical coupler and into the transparent substrate and detecting scattered light from the inspection volume at a detector that is optically conjugate with the inspection volume. | 12-04-2008 |
20090213386 | Apparatus and method for measuring surface topography of an object - An apparatus for measuring surface topography of an object includes an optical arrangement capable of directing a first light beam at a surface of the object, providing a second light beam coherent with and spatially phase-shifted relative to the first light beam, and generating an interference beam from the second light beam and a reflection of the first light beam from the surface of the object. The apparatus further includes at least one line scan sensor for detecting and measuring the interference beam. | 08-27-2009 |
20090237654 | APPARATUS FOR MEASURING DEFECTS IN A GLASS SHEET - A method of measuring the topography of a large, thin, non-flat specular substrate in a production environment with minimal movement of a majority of the measurement apparatus. A gimbal-mounted reflecting element is used to steer a short coherence length probe beam such that the probe beam is substantially perpendicular to a local surface of the substrate. The probe beam and the reference beam are combined and the resulting interference pattern used to characterize defects on the local surface. | 09-24-2009 |
20100051817 | Systems and methods for determining the shape of glass sheets - Disclosed are systems and methods for determining the shape of a glass sheet during and/or after the forming process. In one example, a system for determining the shape of a glass sheet defining an interior bulk can include a light source, an image capture device and a processor that are configured to calculate the location of an energy centroid within a selected portion of the bulk of the glass sheet. | 03-04-2010 |
20130067956 | APPARATUS AND METHOD FOR CHARACTERIZING GLASS SHEETS - Disclosed is an apparatus for characterizing attributes of a moving glass sheet comprising complementary mechanical material handling technologies that progressively stabilize, position, capture, flatten, and release the lower portion of glass sheets traveling past the apparatus while posing minimal constraint on the top section of the sheet. The apparatus includes a pressure-vacuum (PV)-type device comprising distinct regions such that the glass sheets experience a non-contact but gradual increase in constraining force until the point where measurements can be performed, then a gradual decrease in constraining force until the glass sheets are released from the inspection station. This graduated force technique is applied along the direction of travel of the sheets and may also be applied vertically upwards along the height of the sheet to restrict the motion of the sheet without constraining it at pinch points near the conveyor. | 03-21-2013 |
20130135459 | APPARATUS AND METHODS FOR DETERMINING SURFACE COMPLIANCE FOR A GLASS SURFACE - A method for determining surface quality for a glass surface is provided. The method includes depositing a pattern of drops over the glass surface using a drop dispensing apparatus. Adjacent drops have a predetermined deposit size and a predetermined deposit spacing. Drop information for the pattern of drops is generated using a vision apparatus. An out-of-parameter condition is detected by analyzing the drop information and an indication of the out-of-parameter condition is provided. | 05-30-2013 |
20140123703 | THICKNESS CONTROL OF SUBSTRATES - A thickness of at least one preselected portion of a substrate, such as glass substrate for example, is controlled. A laser beam is directed to the at least one preselected portion of the substrate in a viscous state, thereby increasing a temperature and reducing a viscosity of the at least one preselected portion of the substrate in a viscous state sufficiently to cause the at least one preselected portion of the glass substrate to attain a desired thickness. The laser beam after it is generated can be directed to a reflecting surface from which the laser beam is reflected to the at least one preselected portion of the substrate in the viscous state. The substrate can comprise a glass ribbon produced in a downdraw glass forming process for example, and the laser beam can be directed onto a plurality of preselected portions of the glass ribbon. | 05-08-2014 |
20140248096 | APPARATUS AND METHOD FOR CHARACTERIZING GLASS SHEETS - Disclosed is an apparatus and method for characterizing attributes of a moving glass sheet comprising complementary mechanical material handling technologies that progressively stabilize, position, capture, flatten, and release the lower portion of glass sheets traveling past the apparatus while posing minimal constraint on the top section of the sheet. The apparatus includes a pressure-vacuum (PV)-type device comprising distinct regions such that the glass sheets experience a non-contact but gradual increase in constraining force until the point where measurements can be performed, then a gradual decrease in constraining force until the glass sheets are released from the inspection station. This graduated force technique is applied along the direction of travel of the sheets and may also be applied vertically upwards along the height of the sheet to restrict the motion of the sheet without constraining it at pinch points near the conveyor. | 09-04-2014 |