Scope: This International Standard applies to the BASIC SAFETY and ESSENTIAL PERFORMANCE of GAMMA BEAM THERAPY EQUIPMENT, including MULTI-SOURCE STEREOTACTIC RADIOTHERAPY equipment, hereafter referred to as ME EQUIPMENT. If a clause or subclause is specifically intended to be applicable to ME EQUIPMENT only, or to ME SYSTEMS only, the title and content of that clause or subclause will say so. If that is not the case, the clause or subclause applies both to ME EQUIPMENT and to ME SYSTEMS, as relevant. HAZARDS inherent in the intended physiological function of ME EQUIPMENT or ME SYSTEMS within the scope of this standard are not covered by specific requirements in this standard except in 7.2.13 and 8.4.1 of the general standard. The object of this particular standard is to establish particular BASIC SAFETY and ESSENTIAL PERFORMANCE requirements for GAMMA BEAM THERAPY EQUIPMENT.