Figure 1.

The schematic illustration. Left: the number of solid components b0 =7 and the number of windows b1=0, then the ratio b1/b0=0/7=0, Right: the number of solid components b0=2 and the number of windows b1=4 and the ratio b1/b0=4/2=1.5.

Nakane et al. Diagnostic Pathology 2013 8(Suppl 1):S27   doi:10.1186/1746-1596-8-S1-S27