Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
X-ray CT scanner










Image Number 11 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
Secure mobile ad hoc network
Heteroleptic iridium complexes as dopants
Antenna device and wireless communication apparatus
Spin transition material
Chair
Processing abstract derived entities defined in a data abstraction model
Battery pack with connecting device
  Randomly Featured Patents
Electronic circuitry
Internal combustion engine system
Process for producing quarternary glycine nitriles
Adjustable cleaning of fibers in a spiralled air path and apparatus
Apparatus for hydroponic cultivation
Trash receptacle lining system
Arrangement for digital transmission of information across wires
Demodulator for digital FM signals
Shoe sole
Media communication system, and terminal apparatus and signal conversion apparatus in said system