X-ray or gamma ray systems or devices – Specific application – Mammography
Patent
1997-07-07
2000-04-11
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Mammography
378207, A61B 604
Patent
active
060495839
ABSTRACT:
Methods and apparatus for testing and recording the performance of mammography compression devices are shown to include compression phantoms to which the compression force is applied and the compression phantom is imaged. The compression phantoms are provided with compression force measurement features for radiographically determining the performance of the mammography compression device in terms of the magnitude of the compression force applied to the compression phantoms. Methods for measuring compression forces of mammography systems using the compression phantoms are described as positioning a compression phantom, equipped with a compression force measurement feature, between a compression paddle and breast support platform of a mammography unit, applying a compression force to the compression phantom with the compression paddle to produce a spatial response of the compression force measurement feature, radiographing the compression phantom to produce a latent image on a film of the compression phantom and spatial response of the compression force measurement feature, processing the film to develop a radiographic image of the compression phantom and the spatial response of the compression force measurement feature, and determining the magnitude of the compression force applied to the compression phantom by comparing the radiographic image of the spatial response of the compression force measurement feature to a calibration pattern. Methods and apparatus described herein are useful for testing mammography compression devices and are particularly useful in providing permanent records of compression performance.
REFERENCES:
patent: 4744099 (1988-05-01), Huettenrauch et al.
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