Method and apparatus for measuring the thickness of...

A - Human Necessities – 61 – B

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A61B 5/107 (2006.01) A61B 6/04 (2006.01)

Patent

CA 2391133

A method and apparatus for determining a degree of deflection in a breast compression plate. The mammography apparatus further includes an optical measuring device. The method and apparatus involve (a) providing a pattern on the breast compression plate, the pattern being imagable by the optical measuring device, and having a plurality of local pattern indicia; (b) adjusting the breast compression plate to a selected height; (c) imaging the breast compression plate using the optical measuring device to provide an image of the pattern, the image having a plurality of local image indicia including an associated local image indicia for each local pattern indicia in the plurality of local pattern indicia; and (d) for each local pattern indicia in the plurality of local pattern indicia, determining an associated local deflection of the breast compression plate from the associated local image indicia.

Procédé et appareil permettant de déterminer un degré de déflexion dans une plaque de compression du sein. L'appareil de mammographie comporte un dispositif de mesure optique. La méthode et l'appareil permettent de : a) fournir un motif sur la plaque de compression du sein, ce motif pouvant être à l'origine d'une image créée par le dispositif de mesure optique, et plusieurs indices de motifs locaux; b) régler la plaque de compression du sein à une hauteur sélectionnée; c) créer une image à partir de la plaque de compression du sein au moyen du dispositif de mesure optique afin d'obtenir une image du motif, cette image comportant plusieurs indices d'images locales, y compris des indices d'images locales associés à chaque indice de motifs locaux; d) déterminer, pour chaque indice de motifs locaux de l'ensemble, une déflexion locale connexe de la plaque de compression du sein à partir des indices d'images locales associés.

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