Method and device for controlling the operation of a mammographi

Details Method and device for controlling the operation of a mammographi Method and device for controlling the operation of a mammographi

1990-11-20

1992-03-24

Howell, Janice A.

X-ray or gamma ray systems or devices

Specific application

Mammography

378 95, 378208, A61B 604

Patent

active

050995030

ABSTRACT:
Method and device for controlling the operations of a mammographic X-ray apparatus. In the apparatus the breast (4) to be photographed is pressed between a press plate (2) and a film cassette (5) or an equivalent depicting member. In the method the compression force (F) applied by the holder means to the breast (4) to be photographed, or a quantity that represents this force (F) indirectly, is measured. On the basis of the measurement, the velocity (V) of the compression movement of the press mechanism is regulated. The apparatus comprises a C-arm (1), at one of whose ends the X-ray tube (6) is placed and at the other end the film cassette (5). The C-arm (1) is rotatable around a shaft (8) by means of a motor (9). The device comprises a detector (3) or a series of detectors which measures the compression force and by means of which the operation of the press motor (7) for the breast holders is arranged to be controlled.

REFERENCES:
patent: 4658409 (1987-04-01), Summ
patent: 4744099 (1988-05-01), Huettenrauch et al.

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