X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Reexamination Certificate
2005-03-15
2005-03-15
Bruce, David V. (Department: 2882)
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
C378S154000, C378S155000
Reexamination Certificate
active
06868137
ABSTRACT:
It is an object of one of the inventions to acquire a radiation image in which a stripe pattern originating from a scattered ray removing grid is less apt to interfere with observation. An image acquisition apparatus of one of the inventions includes a sensor for spatially sampling a radiation transmission distribution of an object to be imaged at a spatial sampling interval and acquiring an image of the object, and a scattered ray removing grid for removing scattered rays from the object, wherein an interval of elements of the scattered ray removing grid is set such that a spatial frequency of a stripe pattern, in the image, which originates from the scattered ray removing grid becomes not greater than 40% of a sampling frequency that is a reciprocal of the spatial sampling interval.
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Bruce David V.
Canon Kabushiki Kaisha
Keaney Elizabeth
Morgan & Finnegan L.L.P.
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