X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Reexamination Certificate
2006-07-11
2006-07-11
Glick, Edward J. (Department: 2882)
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
C378S097000
Reexamination Certificate
active
07076027
ABSTRACT:
The object of the present invention is to enable photographing of a desired X-ray image in accordance with each of fluoroscopy, radiography of moving images in an area of interest and spot radiography by simplified operations, and to reduce an exposure dose to a subject. A correlation table is previously input before radiographing (S1), and is memorized (S2). A radiographer sets an irradiation field R to R1(S3), and an X-ray aperture is opened by predetermined quantity (S4). An opening value is sent to a control part (S5), and X-rays irradiate a subject P on an irradiation condition of a tube voltage (V) and tube current (A) based on the correlation table (S6). The emitted X-rays pass through the subject, enter a planar X-ray-detecting element, then are read and converted to picture signals. In addition, a method of reading picture signals through a reading circuit can be linked to information on the correlation table, and the reading circuit is controlled so as to add picture signals, for instance, of 4 by 4 (=16) pixels which are adjacent to each other into a picture signal of 1 pixel and read it (S7).
REFERENCES:
patent: 5539798 (1996-07-01), Asahina et al.
patent: 6222906 (2001-04-01), Sakaguchi et al.
patent: 6292537 (2001-09-01), Zimmermann
patent: 2786849 (1998-05-01), None
Canon Kabushiki Kaisha
Glick Edward J.
Morgan & Finnegan , LLP
Song Hoon
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