Guide for quality control and safety in clinical linear accelerators.

The main objective of this document has been to establish a guide for the design of the quality control programme in linear accelerators with isocentric assembly, incorporating the approaches of statistical process control and risk analysis. Throughout the text, it is emphasized that the guide is not prescriptive, and adaptation to the specific needs of each centre is encouraged. A brief description of the recommended tests is presented. A set of fundamental parameters and complementary ones are suggested, taking into account the results obtained from a survey of SEFM members, as well as proposals from other scientific societies, manufacturer comments, and consensus from this working group. Frequency and tolerance recommendations are provided for representative accelerators as a reference. This document presents a summarized version of the guide, which is accessible in Revista de Física Médica or on the website of the SEFM, providing a synthesis of the main recommendations.