X-ray or gamma ray systems or devices – Specific application – Tomography
Reexamination Certificate
2007-12-25
2007-12-25
Thomas, Courtney (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Tomography
C378S019000, C378S901000
Reexamination Certificate
active
10901212
ABSTRACT:
A radiographic apparatus removes lag-behind parts from radiation detection signals taken from an FPD as X rays are emitted from an X-ray tube, on an assumption that the lag-behind part included in each X-ray detection signal is due to an impulse response formed of a plurality of exponential functions with different attenuation time constants. When a single attenuation time constant and intensity are provisionally set, checking is made whether an attenuation to a noise level of X-ray detection signals occurs in an X-ray non-emission state following an X-ray emission state. When the set attenuation time constant and intensity are found appropriate (OK), the impulse response having the single exponential function is determined valid. Corrected radiation detection signals are obtained by removing the lag-behind parts using the impulse response determined.
REFERENCES:
patent: 4000425 (1976-12-01), Craig
patent: 5249123 (1993-09-01), Hsieh
patent: 5265013 (1993-11-01), King et al.
patent: 5359638 (1994-10-01), Hsieh et al.
patent: 5517544 (1996-05-01), Levinson
patent: 6295331 (2001-09-01), Hsieh
patent: 6493646 (2002-12-01), Hsieh et al.
patent: 7003071 (2006-02-01), Nagaoka et al.
patent: 2003/0194058 (2003-10-01), Tsujii
patent: 2003/0223539 (2003-12-01), Granfors et al.
patent: 2005/0036582 (2005-02-01), Nagaoka et al.
patent: 2005/0151086 (2005-07-01), Spahn
Investigation of a Solid-State Detector for Advanced Computed Tomography, Hsieh et al., IEEE Transactions on Medical Imaging, vol. 19, No. 9, Sep. 2000.
Adachi Susumu
Asai Shigeya
Fujii Keiichi
Hirasawa Shinya
Nishimura Akihiro
Cheng Law Group PLLC
Shimadzu Corporation
Taningco Alexander
Thomas Courtney
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