Abstract
The cassette, interspacer and film to be used for beam focus radiography were checked for use in a new type of radiography. The industrial X-ray film (Fuji, type 80) seems to be the most suitable, because the adequate density is obtainable during the course of therapy of 200-250 R. The edge of the cassette made of aluminum round and 1 mm thick, and the interspacer of mortopren are adequate for routine use, although there is a slight increase of the scattering causing less of a contrast of the radiogram.

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