Medical electrical equipment. Dosimeters with ionization chambers as used in radiotherapy

This document specifies technical requirements and test methods for dosimeters utilizing charged ionization chambers employed in radiotherapy. These instruments are designed to measure the dose delivered by electromagnetic radiation or particle beams used in medical treatments. The scope encompasses the physical characteristics, calibration procedures, and performance criteria necessary to ensure accuracy and reliability in clinical settings. Particular attention is given to the construction of the ionization chambers, the stability of the reading systems, and the environmental conditions under which measurements are performed. The text outlines the definitions of key parameters such as absorbed dose, exposure, and related quantities relevant to radiation therapy applications. It details the methodology for determining the sensitivity of the device and verifying its linearity over a defined range of doses. Furthermore, the document addresses safety aspects related to the electrical insulation and mechanical integrity of the equipment. By adhering to these specifications, medical physicists and engineers can standardize the quality control processes for radiation dose measurement. The provisions aim to minimize uncertainties in treatment delivery and promote consistency across different medical facilities. Compliance with these guidelines ensures that therapeutic doses are accurately administered to patients, supporting effective cancer treatment protocols without compromising safety standards.