Full figure (37 kB)Fig. 1. Impact of dose grid size on visualization isodose rate distributions. The isodose lines decrease from 10, 5, 2, 1, 0.5, and 0.2 cGy/h for a 0.5 U model 6711 I source. The radioactive component is indicated by the centrally positioned rectangle within the source capsule. From upper left to lower right, the grid size is 5, 2, and 1 mm, and 0.1 mm on a side. Scale ticks indicate 10 mm. First citation in article