Comparison of Two Mammographic Views

The comparison of two views of the same breast is known as ipsilateral comparison. Figure  shows CC and MLO views of the same breast. There are two main strategies depending on when the segmentation is performed: after or before establishing correspondence between both views. Sun et al. [,] segmented both views independently and subsequently compared the results. In contrast, Highnam et al. [] proposed an alternative approach, consisting of initially obtaining correspondence and subsequently segmenting the images. Specifically, they proposed a simple breast acquisition model where they draw a point in one view and map this to a line in the other view. Local information is used to reduce the line to a point, to obtain a point to point correspondence between views.

Figure 2.4: CC and MLO views of the same breast.