Figure 3

Tissue displacement model. The absolute value of the tissue displacement, |T ₀|, as a function of the distance |r| from the prostate centre, when a prostate with radius 2.5 cm is assumed to be displaced 0.5 cm. Inside the prostate, i.e. |r| < r _CTV, the displacement is constant. Outside the CTV, i.e. |r| > r _CTV, the displacement decreases exponentially and vanishes far from the prostate