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
High surface area composition for use in the catalytic hydroconversion of a heavy hydrocarbon feedstock, a method making such composition and its use
Charge pump circuit and power-supply method for dynamically adjusting output voltage
Target output device and extreme ultraviolet light source apparatus
Interferer region identification using image processing
Printing control method and printer for printing on a label
Device and method for adjusting a chrominance signal based on an edge strength
Integrated testing circuitry for high-frequency receiver integrated circuits
  Randomly Featured Patents
Downed aircraft position indicator
Color monitor with improved color accuracy and current sensor
Polynomial generation method for circuit modeling
Isoindolone compounds and their use as metabotropic glutamate receptor potentiators
C-shaped support for cable marking with at least one end having an oblique shaped surface
Ventilation device for a piston for a cartridge
Automatic forward/reverse gear change system having a main clutch disengaged and main vehicle brake engaged during a shuttle shift
Adjustable angled socket wrench extension
Valve area scheduling in a double acting piston for a hydraulically-actuated fuel injector
Method of forming bipolar transistor having closely spaced device regions