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Analysis of marker detection failure in the breast region of patient 3. (a) Mammography image of ex-vivo breast tissue of patient 3. Zoomed-in view shows the marker (normal to the imaging plane) near a needle. (b) PA image of a marker placed vertically. (c) US image of the vertical marker. (d) PA image of the same marker when it was horizontal. (e) US image results of the horizontal marker. The scale bar is 10 mm.
