[Improvement of focal dose determination in the small pelvis].

An easily applicable auxiliary method in order to register exactly the topographic relations on horizontal sections in the small pelvis is indicated. Only the body contour, pelvis pictures on two planes, diapositives with the corresponding pictures of the cross-section and a photographic enlarger are needed. A sagittal tomogram in the median plane, and for radium therapy the localization pictures on two planes are other helps.