A digitized tomosynthesis method for projecting a 3D volumetric image of an object
onto a virtual projection plane that comprises an alpha blend plane subdivided
into a rectangular array of pixel cells. A ray of energy defines a trace representing
a virtual sight path ray passing from a view point through one pixel cell of the
alpha blend plane to define a view level image, wherein a 3D volumetric image of
the object is projected by computing the coordinate of an object voxel referenced
to the image plane, computing the image plane intercept of the ray of energy from
the source through the object voxel, and forming a plurality of successively selected
view level image planes at the alpha blend plane.