The thesis deals with the issue of operative dosimetry, to be specific, with personal dosimetry. The objective of the thesis is to compare several parameters, such as the dose, direction and energy dependence, in two types of electronic dosimeters made by the firm Siemens (type EPD1) and by the firm MGP Instruments (type DMC 2000XB). In the first section of my thesis the personal monitoring and related data such as quantities used to monitor external irradiation are introduced. In the next section the operative monitoring, focused mainly on electronic but also on thermoluminescent and radiophotoluminescent dosimetry, is described. The results of the irradiation (exposure) of electronic personal dosimeters of types EPD1 and DMC 2000XB are included in the thesis and the measured values are statistically processed. The dose, direction and energy dependence of both types of these dosimeters is evaluated and put into diagrams.