Resources Contact Us Home
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
Administrable compositions
Maintenance guidance display device, maintenance guidance display method, and maintenance guidance display program
Multi-domain dynamic group virtual private networks
System for controlled release of an active principle and method for preparation
Methods and systems for assessing sales activity of a merchant
Polypeptides and immunizing compositions containing gram positive polypeptides and methods of use
Chemically bonded carbon nanotube-polymer hybrid and nanocomposite thereof
  Randomly Featured Patents
Differential magneto-resistive head pre-amplifiers for single polarity power supply applications
Tracking file access patterns during a software build
Boat kettle grill support bracket
Transgenic animal as a model for fibrotic diseases
Mold, for screw-threaded articles
Magnetic manipulation of biological samples
Complete destruction shell
Self-test system
Virtual computer system and migration method of virtual computer
Signal coding