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
Backup and recovery of distributed storage areas
Subcarrier cluster-based power control in wireless communications
Lighting fixture
Asynchronous loading of scripts in web pages
Handbag
Synergistic fungicidal interactions of 5-fluorocytosine and other fungicides
Method of operating an election ballot printing system
  Randomly Featured Patents
N-heteroarylmethyl-m-phenylenediamine derivatives-containing dyes for keratin fibers and novel n-heteroarylmethyl-m-phenylenediamine derivatives
Solid state imaging device
Rose plant named "Smooth Velvet"
Prevention and treatment of gram negative, flagellated bacterial infections
Aquatic motion display toy
Apparatus and method for etching glass panels
Photo dazzle color temperature correction
Calcilytic compounds
Foot massage apparatus
Multilayer wiring structure