X-ray CT apparatus, x-ray CT apparatus afterglow correction...

Details X-ray CT apparatus, x-ray CT apparatus afterglow correction... X-ray CT apparatus, x-ray CT apparatus afterglow correction...

2006-02-21

2006-02-21

Bruce, David V (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S008000, C378S901000

Reexamination Certificate

active

07003071

ABSTRACT:
An X-ray CT apparatus including an X-ray source for applying X-rays to an object, an X-ray detector arranged to face the X-ray source for determining the amount of transmitted X-rays of the object as projection data, basic-data acquisition means for acquiring response data of the projection data as basic data with no object present in advance every time the image of the object is acquired, analyzing means for analyzing an afterglow component of the acquired basic data into a plurality of time constants and their component ratios, storage means for storing the analyzed time constants and component ratios, correcting means for extracting an afterglow component of the projection data on the basis of the stored time constants and component ratios during radiography of the object and removing the extracted afterglow component of the projection data from the projection data to produce corrected projection data, reconstructing means for reconstructing an image using the produced corrected projection data, and display means for displaying the reconstructed image.

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Kenjiro Oda, Yoshio Matsumoto, Shin-ichiro Mishima, “ Optimizing Power of Genetic Algorithm Concerning Parameter Estimation of Mathematical Model: Application To An Organic Material Decomposition Model”, 1996, (and English translation of section 4).

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