The class tt(Tomo) is derived from tt(ModBase).

tt(Tomo's) base class extracts the tt(costs) parameter from the configuration
file.

The modality's specificity is obtained by finding the case's actual age in the
vector tt(d_specVect) (as configured in the configuration file) and returning
the associated specificity value.

Likewise, the radiation doses and sensitivity values are returned by the
tt(vDose) and tt(vSensitivity) members, using bi-rad category as index (0 for
'a' through 3 for 'd').
