title: Theoretical and experimental analysis of scatter from inhomogeneous slabs in a 60Co beam: the differential tissue-air ratio method (DTAR).
abstract: A theoretical and experimental analysis of scatter from inhomogeneous slabs in a 60Co beam has been developed. This analysis has been used to examine the differential scatter-air ratio method (DSAR). It has been found that a simplification of this method gives more accurate results than the original one. Thus, a method which takes advantage of this simplification has been developed, called the 'differential tissue-air ratio method (DTAR)'. It is compared with experimental results. The accuracy is satisfactory for a wide range of applications (usually approaching the limits of the precision of the measurements, about 2%) and leads to calculation times not significantly longer than any conventional method (e.g. Batho).
mesh_terms: D000388:Air; D003037:Cobalt Radioisotopes / Q000627:therapeutic use*; D006801:Humans; D008433:Mathematics; D008954:Models, Biological; D011878:Radiotherapy / Q000379:methods*; D011879:Radiotherapy Dosage
chemical_list: D003037:Cobalt Radioisotopes