X-ray examination apparatus including a subtraction unit

Details X-ray examination apparatus including a subtraction unit X-ray examination apparatus including a subtraction unit

1996-12-19

1999-01-12

Porta, David P.

X-ray or gamma ray systems or devices

Electronic circuit

With display or signaling

378 988, H04N 500

Patent

active

058598928

ABSTRACT:
An X-ray examination apparatus includes an X-ray source (1) for irradiating an object (2) by means of an X-ray beam (3) in order to form an X-ray image. An optical image is derived from the X-ray image by means of an X-ray detector (4). The optical image is picked up by means of an image pick-up apparatus (5). The image pick-up apparatus (5) includes a plurality of image sensors (6, 7) for deriving separate electronic sub-image signals from the optical image. The image pick-up apparatus also includes a subtraction unit (8) for subtracting the electronic sub-image signals from one another. The image pick-up apparatus (5) also includes a control circuit (9) which is arranged to make integration periods of individual image sensors (7, 8) commence at instants which are spaced a waiting period apart. The difference signal represents changes in the X-ray image or, when the X-ray energy is changed during the waiting period, differences in X-ray absorption due to energy-dependency.

REFERENCES:
patent: 4355331 (1982-10-01), Georges et al.
patent: 4544949 (1985-10-01), Kurihara
patent: 4549209 (1985-10-01), Grady et al.
patent: 4675731 (1987-06-01), Takasu et al.
patent: 4722097 (1988-01-01), Haendle
patent: 5436952 (1995-07-01), Haendle et al.
patent: 5602896 (1997-02-01), Diepstraten

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