Abstract
An apparatus for automatic recording of dose distribution in moving-field radiotherapy was devised. Ionization current output from the ionization chamber inserted in the human phantom made of acrylite was amplified and converted into voltage by the direct current amplifier. Output from the direct current amplifier of each channel was integrated in the integrator, which was put into the divider. Relative dose value thus obtained were typewritten in the corresponding points on the recording paper automatically through the A-D convertor. Actual examples of dose distribution by this method are illustrated.
