— This document can involve the use of hazardous materials, operations, and equipment. This document does not purport to address all of the safety problems associated with their use. It is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Moreover this document does not cover the aspects related to the people protection against the X-ray. To obtain information applicable to this aspect, it is convenient to refer to national and international standards, and also to the local regulations if they exist.