Biomedical subjects
Publications and source records attributed to W Lobodziec.
A method of correcting the output dose rate of the radiotherapeutic cobald units is presented. This method links measurements values with the decay formula for increasing the accuracy of output dose rate determining. The least squares method has been applied to mathematical processing of the data. Results were discussed on the record of output dose rate which had been measured since 1969.
We are presenting a method of calculating the dose-rate distributions in partially shielded field. An attenuator was placed in central beam axis and also in an off-axis geometry. The study was made with a Co-60 radiation and with photons generated by 10 and 23 MV Linac at depths, in phantom, from 5 to 30 cm. To obtain the calculated values of dose-rates; the contributions of the three components to the total dose-rate were measured. The calculated dose-rate distributions agree well with the measured data in case of 10 MV and 23 MV radiation.
The paper discusses the dependence of percentage depth dose and tissue phantom ratio on depth and on radiation field size for photons produced in a linac Saturne II plus. The results expressed by the simple formulas have been presented in tables and on graphs.
The method of calculation of the two- and three-dimensional dose-rate distribution for wedged beams of 9 MV X-rays and Co-60 gamma-rays is presented. The method was examined for Linac Neptune 10p and Gammatron 80S. The experimental results show that for computing the dose-rate distribution of a wedged beam it is sufficient to know: 1. the profile function for open fields defined as the relative dose-rate distribution across the radiation beam and 2. the parameters of the wedge filter. The computed and measured results are presented in tables and on graphs.
A method of calculation of the three-dimensional dose-rate distribution for X-rays of Linac Neptun 10p and gamma-rays of Gamma-tron 80S is presented. The experimental results show that the profiles function defined as the relative dose-rate across the radiation beam is useful for this purpose, and it is sufficient to determine the profile function only at one depth and for one field size. The results of measurements are presented on the graphs.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.