Calculation of biologically effective doses (BED) in a Java Applet

The dose at which cells response to radiation is defined as the biologically effective dose (BED) and depends on both the total physical dose (TD) and the relative efffetiveness (RE) of this dose:

where D is the total physical dose, d is the physical dose per fraction and α/β is the biological coefficient specific for each tissue. α and β are the coefficient of non-repairable and repairable damage, respectively.
The radiation survival probability (S) can be derived from the BED:

Download the source code for this applet.

References:

Dale, RG. The application of the linear quadratic dose effect equation to fractionated and protracted radiotherapy. Br J Radiol, 58:515-28, 1985

Oldham M. Radiation physics and applications in therapeutic medicine. Phys Educ., 36:460-67, 2001.