Compensator:


A compensator is similar to a Multi-Leaf Collimator (MLC) in the fact that it adjusts the intensity of the beam to deliver the planned dose to the treatment volume and to limit does to the surrounding critical structures. This technique is not often used in conventional radiation therapy but is utilized often in proton therapy.  These devices can be made out of brass for conventional radiation therapy and acrylic or wax for proton therapy.