title: Analytical approach for depth dose calculations (60Co beams with fixed source-target distance).
abstract: A method is described to calculate depth dose distribution to a principal plane using analytical formulas for 60Co teletherapy units and constant source-to-target distance. The formulas were derived from experimental measurements taking into consideration the obliquity of the beam. For the purposes of dose calculation the beam was divided into primary and scattered components. A computer program incorporating the formulas was developed for an IBM 360/67 computer. Dose distributions computed and obtained from experimental measurements were in good agreement. The computer program is now in use for treatment planning, including rotational techniques.
mesh_terms: D003037:Cobalt Radioisotopes / Q000627:therapeutic use*; D003201:Computers; D006801:Humans; D008433:Mathematics; D008722:Methods; D011867:Radioisotope Teletherapy; D011879:Radiotherapy Dosage; D013819:Thermoluminescent Dosimetry
chemical_list: D003037:Cobalt Radioisotopes