Resources Contact Us Home
X-ray CT scanner

Image Number 5 for United States Patent #5684855.

Only an umbra of an X-ray beam is allowed to enter a designated detecting device arrays of an X-ray detector, whereby stable and good X-ray detection signals and images are provided. Even if a focal spot in an X-ray tube shifts, occurrence of artifacts or shifts of CT numbers is prevented to improve image quality. An X-ray CT scanner comprises an X-ray tube and X-ray detector, which are opposed to each other with a patient lying down on a couchtop between them, and a pre-collimator inserted between the X-ray tube and patient for restricting the width in a slice direction of an X-ray beam irradiated by the X-ray tube. The X-ray detector consists of, for example, a two-dimensional detector in which a plurality of detecting device arrays are arranged in the slice direction, each detecting device array including a plurality of detecting channels. The scanner further comprises a unit for controlling the pre-collimator in a manner that a detecting device array designated among the plurality of detecting device arrays receives only an umbra of the X-ray beam. An X-ray CT image is reconstructed using data detected by the designated detecting device arrays.

  Recently Added Patents
Process of preparing functionalized polymers via enzymatic catalysis
Organic semiconductor compound, semiconductor device, solar cell and producing method of organic semiconductor compound
System for encrypting and decrypting a plaintext message with authentication
Buildable dinnerware
Liquid crystal display
Process for the preparation of diene polymers of statistical vinylarene-diene copolymers
Portable gaming device and gaming system combining both physical and virtual play elements
  Randomly Featured Patents
Contents rating method
Microspectrometer based on a tunable fabry-perot interferometer and microsphere cavities
Image forming apparatus
High affinity human antibodies to human IL-18 receptor
Automobile door locking systems
Additive for, treatment fluid for, and method of plugging a tubing/casing annulus in a well bore
Wafer-processing tape and method of producing the same
Method and apparatus for input classification using non-spherical neurons
Boat rudder with integrated dynamic trim foils
Phenylethane derivatives and acid addition salts thereof for increasing lean meat deposition and/or improving lean meat to fat ratio in warm blooded animals