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.
Palliative treatments are not intended to cure. Instead, they relieve symptoms and reduce the suffering caused by cancer. Some examples of palliative radiation therapy are: 1  Radiation given to the brain to shrink tumors formed from cancer cells that have spread to the brain from another part of the body (metastases).2  Radiation given to shrink a tumor that is pressing on the spine or growing within a bone, which can cause pain.alliative treatments are not intended to cure. Instead, they relieve symptoms and reduce the suffering caused by cancer. Some examples of palliative radiation therapy are: 1  Radiation given to the brain to shrink tumors formed from cancer cells that have spread to the brain from another part of the body (metastases).