Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Load balancing in shortest-path-bridging networks
Measurement system service for a vehicle instrument panel
Information processing apparatus, information outputting method and computer program storage device
Carrier or transport strip
Imidazole derivatives used as TAFIa inhibitors
Tint block image generation program and tint block image generation device
Method for manufacturing thin film transistor and method for manufacturing display device
  Randomly Featured Patents
Self-centering door lock guide
Modified minimum distance criterion for blended random and nonrandom encoding
Image processing device, method and program product processing barcodes with link information corresponding to other barcodes
Motorcycle
Method of operating a rotary internal combustion engine
Video microscopy method
System and method for decoding multiplexed, packet-based signals in a telecommunications network
Circuit board apparatus
Temporary traffic signal light cover
Fresnell lens and filter for use with computers and the like