title: Dose-rate distribution under partially shielded beams.
abstract: 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.
authors: Centre of Oncology, Department of Medical Physics, Gliwice, Poland.
authors: J
authors: J
authors: Malicki
authors: W
authors: W
authors: Lobodziec
authors: K
authors: K
authors: Slosarek
mesh_terms: D003037:Cobalt Radioisotopes / Q000627:therapeutic use; D006801:Humans; D008433:Mathematics; D008961:Models, Structural; D010315:Particle Accelerators; D011827:Radiation; D011835:Radiation Protection; D011878:Radiotherapy / Q000379:methods*; D011879:Radiotherapy Dosage; D012542:Scattering, Radiation
chemical_list: D003037:Cobalt Radioisotopes