Patents Examined by Chih-Cheng Glen Kao
  • Patent number: 7394887
    Abstract: A method for reconstructing tilted cone beam data acquired using a CT apparatus. The CT apparatus has a gantry and a table. The gantry has an x-ray source and a detector array with columns and rows. The gantry is tilted at a gantry tilt angle with respect to the table and a plurality of projection data is acquired using the CT apparatus. Fan-parallel rebinning is performed on a row by row basis to form a plurality of reconstructed pixels. The coordinate locations of the plurality of reconstructed pixels are adjusted based on the gantry tilt angle and used to form a reconstructed image.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: July 1, 2008
    Assignee: General Electric Company
    Inventors: Jiang Hsieh, Xiangyang Tang
  • Patent number: 7394890
    Abstract: An x-ray imaging system uses particular emission lines that are optimized for imaging specific metallic structures in a semiconductor integrated circuit structures and optimized for the use with specific optical elements and scintillator materials. Such a system is distinguished from currently-existing x-ray imaging systems that primarily use the integral of all emission lines and the broad Bremstralung radiation. The disclosed system provides favorable imaging characteristics such as ability to enhance the contrast of certain materials in a sample, to use different contrast mechanisms in a single imaging system, and to increase the throughput of the system.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: July 1, 2008
    Assignee: Xradia, Inc.
    Inventors: Yuxin Wang, Wenbing Yun, Frederick William Duewer
  • Patent number: 7313216
    Abstract: A scan control method for an X-ray CT apparatus wherein a subject with a contrast agent injected therein is helically scanned with an X-ray beam and image reconstruction is performed based on projection data obtained through an X-ray detector. The method includes controlling a velocity of a helical scan following motion of the contrast agent in the subject.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: December 25, 2007
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Akihiko Nishide, Kotoko Morikawa, Akira Hagiwara, Yasuhiro Imai
  • Patent number: 7308076
    Abstract: A method and system include at least one X-ray source for producing at least one X-ray beam, at least one detector assembly, at least one shutter, and a barcode reader. The shutter directs the at least one X-ray beam toward the detector assembly. The barcode reader is affixed, in a predetermined proximity, to the shutter for detecting a barcode on an object that is moved along the shutter thereby causing the shutter to be opened from a closed state and/or fully closed once the barcode has been detected.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: December 11, 2007
    Assignee: Smiths Heimann GmbH
    Inventors: Wolfgang Studer, Erwin Kirsten
  • Patent number: 7277525
    Abstract: An object is rotated by a rotation device 15 in X rays 25 generated by a X-ray generation device 11. The rotation device 15 makes constant the integration value of the X rays 25 reaching a two-dimensional X-ray sensor 12 during each charge integration time during which a plurality of image data are acquired.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: October 2, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventor: Osamu Tsujii
  • Patent number: 7274769
    Abstract: A method and apparatus for the transportation, remote and unattended mounting, and visual alignment and monitoring of protein crystals for synchrotron generated x-ray diffraction analysis. The protein samples are maintained at liquid nitrogen temperatures at all times: during shipment, before mounting, mounting, alignment, data acquisition and following removal. The samples must additionally be stably aligned to within a few microns at a point in space. The ability to accurately perform these tasks remotely and automatically leads to a significant increase in sample throughput and reliability for high-volume protein characterization efforts. Since the protein samples are placed in a shipping-compatible layered stack of sample cassettes each holding many samples, a large number of samples can be shipped in a single cryogenic shipping container.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: September 25, 2007
    Assignee: The Regents of the University of California
    Inventors: Robert A. Nordmeyer, Gyorgy P. Snell, Earl W. Cornell, William F. Kolbe, Derek T. Yegian, Thomas N. Earnest, Joseph M. Jaklevich, Carl W. Cork, Bernard D. Santarsiero, Raymond C. Stevens
  • Patent number: 7264396
    Abstract: A system for medical emergency care and monitoring of a patient includes as its first component a patient holding apparatus with a fixed base and a table mounted on it, and the table protrudes past the base on the head end with a radio transparent first region and on the foot end with a radio transparent second region. There is also a CT scanner which is movable on the floor along a guide element in such a way that the second region of the table can be brought, by moving the CT scanner, into the patient opening of the CT scanner. For taking x-ray images in the first region of the table, there is an x-ray unit. Another component pertains to a guided patient board that is ridable on the table in the longitudinal direction.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: September 4, 2007
    Assignee: Siemens Aktiengesellschaft
    Inventor: Peter Jährling
  • Patent number: 7266180
    Abstract: A method of manufacturing a collimator mandrel having variable attenuation characteristics is presented. The manufacturing process includes the placement of a layer of attenuating material on a core of base material. The layer of attenuating material is relatively thin and varies in thickness circumferentially around the core. The collimator mandrel may be manufactured by placing a cast about a core of non-attenuating material, filling a void between the cast and the core with an attenuating material, allowing the material to cure, and removing the cast from the assembly.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: September 4, 2007
    Assignee: General Electric Company
    Inventors: Rowland Saunders, Steven Ross, Thomas L. Toth
  • Patent number: 7260174
    Abstract: A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.
    Type: Grant
    Filed: September 13, 2004
    Date of Patent: August 21, 2007
    Assignee: General Electric Company
    Inventors: David M. Hoffman, James LeBlanc, John Tkaczyk, Robert F. Senzig, Yanfeng Du
  • Patent number: 7260176
    Abstract: An X-ray sensor signal processing circuit and method used in an industrial X-ray CT apparatus for processing an output signal of a semiconductor X-ray sensor which detects a pulsed X-ray emitted from an accelerator and passed through an object to be inspected. The circuit includes a first resistor having one terminal connected to the X-ray sensor and an other terminal connected to ground, a first capacitor having one end terminal connected to a connection point of the X-ray sensor and the first resistor, an operational amplifier having an inverting input connected to an other terminal of the first capacitor, and an integrator having a second resistor and a second capacitor each connected to the operational amplifier in parallel. The circuit is configured so that at least bias conditions of the X-ray sensor and the first capacitor are returned to a steady state after irradiation of the pulsed X-ray.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: August 21, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Kamimura, Shigeru Izumi, Hiroshi Kitaguchi, Atsushi Yamagoshi, Katsutoshi Satoh, Noriyuki Sadaoka, Tarou Takagi, Kouji Kuwabara, Shouhei Numata
  • Patent number: 7260171
    Abstract: The present invention is a directed method and apparatus for collimating a radiation beam such that the full intensity of the radiation beam does not impinge detectors of a radiation detector assembly that are particularly susceptible to saturation or over-ranging. This collimation can be dynamically adjusted on a per view basis using empirical or scout scan data.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: August 21, 2007
    Assignee: General Electric Company
    Inventors: Jerome S. Arenson, David Ruimi, Oded Meirav, Robert H. Armstrong
  • Patent number: 7260183
    Abstract: In order to realize a filter that can make a fine spectrum adjustment in a wide rage and can be miniaturized, and to realize an X-ray imaging apparatus provided with the filter, a filter of the present invention is provided with plural filter plates that can form a layer crossing X-ray and adjusting means that adjusts a combination of filter plates forming the layer by individually moving the plural filter plates so as to come in and out the X-ray passing space. The plural filter plates are formed such that the thickness of each filter plate is successively doubled with the thinnest filter plate defined as a reference. The adjusting means has a pair of moving in/out mechanisms for moving, every its half number, the plural filter plates in and out from both sides of the X-ray passing space.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: August 21, 2007
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Ping Yuan, Diansong Cao, Yuqing Li
  • Patent number: 7257186
    Abstract: An imaging method is disclosed for a multi-slice spiral CT scan. A CT unit is disclosed for carrying out this method. In the method, the filtering may be formed by use of multiple applications of a ramp filter and a masking operation to a projection image in a different sequence. The CT unit may include, for filtering purposes, multiple applications of a ramp filter and a masking operation to a projection image in a different sequence.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: August 14, 2007
    Assignee: Siemens Aktiengesellschaft
    Inventors: Herbert Bruder, Guenter Lauritsch, Karl Stierstorfer, Kwok Tam
  • Patent number: 7257196
    Abstract: A radiotherapeutic apparatus employs a collimator (52) set below a radiation source (50) and is adapted to move along an arc (54) substantially centered on the radiation source (50). As it sweeps the arc, the collimator (52) is adjusted so as to define the appropriate shape of radiation beam. A continuous sweep over the patient avoids edge artefacts and localized accumulation of leakage.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: August 14, 2007
    Inventors: Kevin John Brown, David Anthony Jaffray
  • Patent number: 7257195
    Abstract: A collimator for a computer tomograph includes a number of collimator plates and a holder for the collimator plates. The collimator plates include, at the edge, a number of tabs spaced apart from one another. In a fashion corresponding to this, the holder has receptacles that are assigned to the tabs and that are spaced apart from one another, into which the tabs of the collimator plates engage. This configuration ensures highly accurate positioning of even long collimator plates.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: August 14, 2007
    Assignee: Siemens Aktiengesellschaft
    Inventors: Andreas Freund, Claus Pohan
  • Patent number: 7254212
    Abstract: A system, including a particulate matter analyzer and collecting filter, provides a method of analyzing and collecting samples from fluids, such as collecting particulate matter from air. A mass measuring unit and composition analyzing unit can be provided for either simultaneous or immediately consecutive measurements within a single instrument. The filter material can have an antistatic electricity characteristic and can be impregnated with reference material to enable calibration of the composition analyzing unit.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: August 7, 2007
    Assignee: Horiba, Ltd.
    Inventors: Katsumi Saitoh, Junji Kato, Masahiko Fujiwara, Masayoshi Shinohara
  • Patent number: 7254213
    Abstract: The relation relates to a method and a radiological imaging device. A subject (4) is illuminated by a luminous flux (1) generated by an X-ray source (2). This luminous flux (1) is a pulse having a duration tp shorter than 1 ms. The signals S derived from the interaction of the luminous flux (1) with the subject (4) are then detected by means of an X-ray detector (5) having a response time tr shorter than 0.1 ms. Applications possible in medical imaging (mammography, dental care, . . . ).
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: August 7, 2007
    Assignee: Universite Pierre et Marie Curie
    Inventor: Jacques Bourgoin
  • Patent number: 7254209
    Abstract: A computed tomography (CT) reconstruction method includes implementing an iterative image reconstruction process for CT metrology of an object, wherein the iterative reconstruction process utilizes accurate forward projection. During each of a plurality of iterations, a reconstructed image is constrained by utilizing prior outer edge information obtained from a modality in addition to CT, and then transformed to a projection domain so as to generate a calculated sinogram. A correction image is determined based on the calculated sinogram and a measured sinogram.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: August 7, 2007
    Assignee: General Electric Company
    Inventors: Qi Zhao, Chunhe Gong, Bruno De Man, Samit Kumar Basu, Fracis Howard Little
  • Patent number: 7245699
    Abstract: An x-ray optical device includes an optic and an adjustable aperture that selectively occludes a portion of an x-ray beam. The adjustable aperture may be positioned between the optic and a sample and may be integrated with the optic or located in close proximity to the optic. The adjustable aperture enables a user to easily and effectively adjust the convergence of the x-rays. In doing so, the flux and resolution of the x-ray optical device can be optimized by using an optic having the maximum convergence allowed for all potential measurements, and then selecting a convergence for a particular measurement by adjusting the aperture.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: July 17, 2007
    Assignee: Osmic, Inc.
    Inventors: Boris Verman, Licai Jiang
  • Patent number: 7245700
    Abstract: A system and method for providing a sealing arrangement in an X-ray tube are provided. The X-ray tube includes a rotating portion having a plurality of ball bearings and a liquid metal within a housing having the ball bearings therein. The rotating portion is configured to rotate an anode. The X-ray tube further includes a sealing portion formed by a liquid metal vacuum interface configured in a radial direction to resist flow of liquid metal from the housing to a vacuum portion.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: July 17, 2007
    Assignee: General Electric Company
    Inventors: Harith Vadari, Ram Turaga, Mayank Tiwari, Hombe Gowda, Mark Ernest Vermilyea, Frédéric Dahan, Thomas Saint Martin