Nominal Standard Dose Definition

The method of treatment planning for a given DSN value is described in detail using various examples of problems. Beam tables are used to determine the total number of required fractions (NT) for the DSN. This is done by the ratio NSD/d, d represents the fractional dose in rad. Freight tables are treatment plans for 1 to 7 fractions per week. The corresponding value of T (elapsed days) is displayed for different days of the treatment initiation week with their respective values Freight and NSD/d. The management of multiple rest and rest periods is described. It describes a method for finding the NSD value for a treatment that has reached the maximum connective tissue tolerance that covers even the most complex treatment plans. Tumor gripping tables for NSD tumors and their use are described by examples of corresponding problems. The planning of an equivalent RET treatment by direct DSN methods (beam tables) and by an approximation method (tables provided) is described and the application is demonstrated using examples of problems.

The use of opposite and multiple parallel portals is evaluated in the dose values of Ret (peripheral radiobiological effect) and certain conclusions are drawn to guide the therapist. These show in which situations all portals should be used per session and when alternative portals are more advantageous. The effect of portal weighting is included in this analysis. The application of the ELLIS NSD method for radium treatment is described. If changes in the performance factors of the current NSD formula are required in the future, the basic treatment of NSD problems described in this manuscript remains unchanged. The values obtained from these tables can then be adjusted by the appropriate factors.