Resources Contact Us Home
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
Coater platter homing tool
Electromagnetic coupling device of an electromagnetic radiation detector
Process for machining pressure detection hole and apparatus for machining pressure detection hole
Method and product for manufacturing vulcanized footwear or cupsole footwear
Simultaneous compiler binary optimizations
Enhanced clearance in an artificial kidney incorporating a pulsatile pump
Liquid crystal display device having an outer-side optical member and a backlight-side optical member
  Randomly Featured Patents
Serial access memory having data registers shared in units of a plurality of columns
Methods and apparatus for instruction addressing in indirect VLIW processors
Creams containing vitamin D3 derivatives
Procedure for operating a reducing agent metering valve of a SCR-exhaust gas purifying system
Vacuum cleaner
Automatic device for the value-setting of printing wheels in a franking machine
Determining the position and angular orientation of food products
Feedback circuit
Method and apparatus for reading and decoding information
Pressure control apparatus