Title:
放射線撮像装置および放射線検出信号処理方法
Document Type and Number:
Japanese Patent JP4483223
Kind Code:
B2
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.
Inventors:
Shoichi Okamura
Keiichi Fujii
Shin Adachi
Shinya Hirasawa
Toshinori Yoshimuta
Koichi Tanabe
Shigeya Asai
Akihiro Nishimura
Keiichi Fujii
Shin Adachi
Shinya Hirasawa
Toshinori Yoshimuta
Koichi Tanabe
Shigeya Asai
Akihiro Nishimura
Application Number:
JP2003290332A
Publication Date:
June 16, 2010
Filing Date:
August 08, 2003
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
A61B6/00; G01T1/00; G01N23/04; G01T1/17; G01T1/24; G21K5/02
Domestic Patent References:
| JP2000175892A | ||||
| JP2001243454A | ||||
| JP2001309915A | ||||
| JP2003052678A | ||||
| JP2004242741A | ||||
| JP2004321346A |
Attorney, Agent or Firm:
Tsutomu Sugiya