Angel,
It is either x rays or protons beams that are applied. Protons are considered particles (most of the time) so we call this proton beams.
You most likely are getting IMRT which is x rays (or photons).

Hope that helps

M



Partial glossectomy (25%) anterior tongue. 4/6/07/. IMRT start @5/24/07 (3x) Erbitux start/end@ 5/24/07. IMRT wider field (30x) start 6/5/07. Weekly cisplatin (2x30mg/m2), then weekly carbo- (5x180mg/m2). End of Tx 19 July 07.