[Comparison of absorbed doses from cobalt irradiation sources]. / Srovnání absorbovaných dávek od kobaltových ozarovacu.

A comparison of absorbed doses from medical cobalt beams was performed by means of thermoluminescent dosimeters at all radiotherapeutic workplaces in Czechoslovakia. At most workplaces (58%) the deviation from the reference primary etalon placed at the Institute of Radiation Dosimetry of the Czechoslovak Academy of Sciences was below 3%. Neither of the workplaces exhibited deviation higher than 5%, indicating a good level of clinical dosimetry.

Determination of beam output factors for the CGR Saturne 2+ linear accelerator beams.

The demands of a busy clinic require that basic machine calculations be performed as accurately, rapidly and simply as possible. Simple method of predicting X-ray and electron beam output factors for rectangular field sizes on machines that have collimation similar to the CGR Saturne 2+ have been described. The calculated field output factors for rectangular and square field sizes were in agreement with measured data to within +/- 1% for all energies.