[A pocket calculator programmed by magnetic cards as irradiation time table (author's transl)].

A representation of isodoses expressed as percentage of the possible dose maximum is the most practicable method to represent isodose schedules for the therapy planning. This implies, however, that an irradiation time table must exist for every irradiation unit which allows to determine the time of irradiation per irradiated field. A programme for the pocket calculator TI 59 is described which serves as irradiation time table.