Patent ID: 8634516
Filing Date: 2014-01-21
Classification: A61B,G01T

Abstract:
1. An energy subtraction radiographic imaging system for providing energy subtraction images of an object, comprising: an X-ray radiation source configured to generate X-rays having various energy levels including lower energy levels and higher energy levels transmitting through the object; a radiation imaging apparatus configured to operate in association with operation of the X-ray radiation source for receiving X-rays transmitted through the object, the radiation imaging apparatus including a first imaging device, a second imaging device and an attenuating element disposed between said first imaging device and said second imaging device, the attenuating element configured to substantially absorb the X-rays at lower energy levels and substantially allowing transmission of the X-rays at higher energy levels so that said second imaging device substantially receives the X-rays at higher energy levels, said first imaging device configured to include a first pixel array generating first electric signals by receiving the X-rays transmitted through the object and include a first circuitry acquiring said first electric signals from said first pixel array and forming first digital image data of the object using said first electric signals for outputting said first digital image data, and a first storage device for storing said first digital image data of the object output from the first circuitry, said second imaging device configured to include a second pixel array generating second electric signals by receiving the X-rays at higher energy levels transmitted through the attenuating element and include a second circuitry acquiring said second electric signals from the second pixel array and forming second digital image data of the object using said second electric signals output from the second circuitry, and a second storage device for storing said second digital image data of the object output from the second circuitry; and an image processing device configured to acquire said first and second digital image data output respectively from said first and second imaging devices for providing energy subtraction radiographic images of the object using said first and second digital image data.