Radiation is still emitted into a black box
Today it is not possible to follow the anatomical and functional changes of the tumour and surrounding tissue e.g. organs at risk in the patient during the cancer radiation treatment. The changes are resulting in significant variations in the position, shape, and volume of the tumour and surrounding healthy tissue.
Possibilities for performing high-precision adaptive radiation therapy have improved but radiation therapists are still left with a black box problem during the treatment.
Consequently, due to anatomical and functional changes, the radiation might be emitted to healthy tissue and it will not efficiently be covering the entire volume of the tumour.