Figure 1:

In (a) and (b) the axial and coronal views (respectively) reflect a primarily adipose breast composition (low CT number) with interior scattered fibroglandular tissue (higher CT number). In (c) the coronal view is shown with the sampled region outlined in purple. In (d), the CT slices are rendered into an isosurface using the slice and pixel spacing DICOM information provided with the scan and displayed with the surface normal generated at each vertex. In (e) the average superficial tissue CT# from the region sampled in (c) is averaged and displayed over the surface. The isosurface is projected to the same view as the Cherenkov image (f), and surface is co-registered to the background image. The intensity mask from the Cherenkov image is applied to spatial CT image.