a simple computer program for optimization of source loading in cervical intracavitary applicators a computer program has been developed to aid in the brachytherapy of cancer of the cervix using a leastsquares minimization algorithm the program will optimize the source loading in intracavitary applicators so as to reproduce as nearly as physical considerations allow the dose distribution requested by the user applicator geometry and the relative positions of anatomical points of interest must be supplied to the program as well as an inventory of available source strengths output from the computer includes the optimized source loading time of application and the resulting relative doses to the various userselected points of interest