Table 2.
Fuzzy rules used in the Mamdani-fuzzy inference system (Mzenda B et al. 2010)
| Rule | If inputs | Output PTV margin | |
|---|---|---|---|
| ∆TCP | ∆NTCP | ||
| R1 | Almost zero | Almost zero | Almost zero |
| R2 | Very small | Almost zero | Small |
| R3 | Very small | Very small | Small |
| R4 | Small | Small | Medium |
| R5 | Small | Medium | Medium |
| R6 | Medium | Medium | Medium |
| R7 | Medium | High | Small |
| R8 | High | High | Very small |
| R9 | High | Very high | Almost zero |
| R10 | Very high | Very high | Almost zero |
TCP: Tumour control probability, NTCP: Normal tissue complication probability, PTV: Planning target volume