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. Author manuscript; available in PMC: 2012 Oct 1.
Published in final edited form as: Med Eng Phys. 2011 Apr 8;33(8):934–942. doi: 10.1016/j.medengphy.2011.03.001

Fig. 1.

Fig. 1

Four example images showing mammographic breast tissue density rated by radiologists in four BIRADS categories including (a) BIRADS 1 - almost entire fatty, (b) BIRADS 2 - scattered fibro-glandular density, (c) BIRADS 3 - heterogeneously dense, and (d) BIRADS 4 - extremely dense.