Graphene is an allotrope (form) of carbon consisting of a single layer of carbon atoms arranged in an hexagonal lattice. It is the basic structural element of many other allotropes of carbon, such as graphite, charcoal, carbon nanotubes and fullerenes.
In cases where surgery and radiation are combined, proton therapy is an ideal part of brain cancer treatment. Different brain tumors require different doses of radiation for control and eradication. Like any other organ in the body, the brain can only tolerate a limited amount of radiation.
November 21, 2012 -- Proton therapy is a type of external beam radiotherapy that uses a beam of protons to eradicate aberrant tissues and cells such as those found in cancerous tumors.he idea behind using proton beam treatments to decimate a tumor is that protons have a larger mass, shorter penetration distance and thus less scatter of radiation than more traditional sources of radiation therapy such as X-rays.