Dosimetry Measuring for CIX3 Cabinet XRay Irradiator XStrahl

Purpose: To review and compare the results of dosimetric measurements obtained by various methods on the CIX3 Cabinet XRay Irradiator XStrahl. Material and methods: The measurements were carried out using the CIX3 Cabinet XRay Irradiator XStrahl. The equipment included a PC Electrometr, a connecting cable and a Farmer ionization chamber and additional filters made of highpurity copper of various thicknesses. The chamber was calibrated to absorbed dose as well as air kerma. The measurements included half value layer and absorbed dose at reference points at levels of 30, 40, 50, and 60 cm from the radiation source for all defined modes of the devices. The absorbed dose was measured by two methods, in air and in a waterequivalent phantom at a depth of 2 cm relative to the surface level from the radiation source. In addition, there were identified parameters such as reproducibility of radiation, its linearity and timeerror. Results: The obtained values of the half value layers are in agreement with the calculated values and correspond to the tolerance levels specified in the documentation. The absorbed dose measured by the two methods has a good level of overlap at the levels of 30 cm, 40 cm and 50 cm. At 60 cm, the absorbed dose in the phantom is ~5–9 % was lower than the dose in air. Conclusion: In general, the methods used to measure the parameters of this kind of Xray equipment are adequate. The method of measuring the absorbed dose by an ionization chamber calibrated in air kerma units is preferred.