[Approach-related dosage calculation in the surroundings of enclosed radium preparations and its combination with dosage calculation].

This study contains discussions about different possibilities of dose calculation with an electronic computer in the environment of radium applicators. First of all, it is demonstrated that no time can be saved in the exact calculation, even if varying mathematical methods are chosen. Therefore, possibilities are discussed in order to save calculation time by approximation procedures; methods are quoted - one less and one more complicated - for realising such a procedure. Furthermore, the reasons are mentioned that are contrary to an immediate inclusion of this calculation into the physical irradiation planning. Possibilities to overcome these difficulties are cited.