X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Patent
1998-05-18
1999-03-02
Wong, Don
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
378 7, 378901, H05G 164, A61B 603
Patent
active
058781080
ABSTRACT:
A radiographic apparatus which can improve at high speed the picture quality of an X-ray fluoroscopic image or an X-ray radiographic image is disclosed. In a radiographic apparatus acquiring an X-ray fluoroscopic image or an X-ray radiographic image and having a scattered X-ray corrector for eliminating a scattered X-ray component from the acquired X-ray fluoroscopic image or X-ray radiographic image, the scattered X-ray corrector comprises: scattered X-ray intensity distribution function generator for generating a scattered X-ray intensity distribution function on the basis of the acquired X-ray fluoroscopic image or X-ray radiographic image; a moving average calculator for executing moving average calculation a plurality of times in each of the vertical and lateral directions of the acquired X-ray fluoroscopic image or X-ray radiographic image; a window width calculator for calculating a window width of the moving average calculation on the basis of the scattered X-ray intensity distribution function; and a difference calculator means for calculating the difference between the acquired X-ray fluoroscopic image or X-ray radiographic image and an image to which the moving average calculation is performed.
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Baba Rika
Ishikawa Ken
Ueda Ken
Ueki Hironori
Umetake Keiji
Bruce David Vernon
Hitachi Medical Corporation
Wong Don
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