Fig. 4.

Exemplary case of sCT generation in presence of an artificial implant for patient number 18. The implant is not visible on the MR simulation (left) and not reproduced in the sCT (right). The dCT (centre) identifies the voxels with higher density. The PTV (red) and GTV (blue) contours are also reported. The relative dose difference between the reference sCT and the dCT are reported for the axial slice. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)