Figure 2From: IMRT treatment plans and functional planning with functional lung imaging from 4D-CT for thoracic cancer patients (a) Dose distribution of an anatomic IMRT treatment plan with high ventilation regions, as an example (b) The dose–(functional) volume histogram (DVH or DFVH) of the highly-functional lung region, at 20%, 30% and 40% for a large volume of NSCLS cancer patient. Back to article page