Figure 6
A hidden target test and its outcome are shown. (a) An acrylic cube phantom with four ballbearings inside; three were used for alignment and one was used as a target. (b) The film shows the irradiated ballbearing target within a 10 mm-diameter mask. Note that the grid-like pattern observed in the film is a result of stitching the tiles (with varying exposures) from the optical microscope images. |