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A method for estimating compressed breast thickness during mammography

¹ Breast Test Wales, 18 Cathedral Road, Cardiff CF1 9LJ ² University of Edinburgh Department of Medical Physics and Medical Engineering, Western General Hospital, Edinburgh EH4 2XU, UK

Measurement of compressed breast thickness during mammography is necessary for the calculation of breast dose. In theory, it should be possible to calculate breast thickness from the separation of images of radioopaque markers attached to the compression paddle. Such a technique has been evaluated on two models of X-ray set using simulated and real breasts. The results show that breast thickness at a given position can be determined with an average error of about 2 mm by this method, which is likely to be adequate for dosimetry.

Received for publication May 19, 1994. Revision received September 30, 1994. Accepted for publication December 7, 1994.

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