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
LED-array package
Semiconductor element-embedded wiring substrate
Tropoelastin derivatives
Servomotor control circuit
Formation of an optical waveguide
Flash drive
Administrable compositions
  Randomly Featured Patents
Cement block splitter
Method for transparently exchanging data packets
Image printer
Electronic clinical reference and education system and method of use
Language independent code assist user preferences configuration method, system, article of manufacture, and computer program product
Insulated building blocks and composite walls having stackable half-bond symmetry
Water vapor barrier for a concrete flooring system
Straw chopper mounting for a combine
Nitrogen flow stabilizer with tire pressure measuring capabilities
Gripper system for stacked unit loads