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    • 12. 发明申请
    • X-RAY CT IMAGE RECONSTRUCTION METHOD
    • X射线CT图像重建方法
    • US20080240531A1
    • 2008-10-02
    • US12019653
    • 2008-01-25
    • Ichiro SASAKINoriyuki SADAOKA
    • Ichiro SASAKINoriyuki SADAOKA
    • G06K9/00H05G1/60
    • G06T11/006G06T2211/408G06T2211/421
    • In an X-ray CT image reconstruction method, position and size of a high X-ray absorber are determined by photographing a to-be-measured-target using high-energy X-rays, and performing the image reconstruction. Moreover, photographed data is computed which corresponds to a case where the high X-ray absorber is photographed using low-energy X-rays. Next, the to-be-measured-target is photographed using the low-energy X-rays. Furthermore, positions and sizes of low X-ray absorbers are determined by subtracting influence of the high X-ray absorber computed above from projection data which results from the photography using the low-energy X-rays. Finally, the positions and sizes of the high and low X-ray absorbers are synthesized on the reconstructed image.
    • 在X射线CT图像重建方法中,通过使用高能量X射线拍摄待测对象来确定高X射线吸收体的位置和大小,并进行图像重建。 此外,计算与使用低能量X射线拍摄高X射线吸收体的情况相对应的拍摄数据。 接下来,使用低能量X射线拍摄被测量目标物。 此外,低X射线吸收体的位置和大小通过从使用低能量X射线的摄影得到的投影数据中减去上述计算的高X射线吸收器的影响来确定。 最后,在重建图像上合成高低X射线吸收体的位置和大小。