Radiation Therapy Overview, CyberKnife

Hi im going to get radiation in prosses .soon but im scare of close machines .this will be good for me i have .or had cancer tumer in my sinus .but like i said been remove part off but still Dr wants me to do the radiation to removed was left and so it wont come back will this be the machine i they will be using for this theraphy rediation please say yes cause im so scare of close machines