Use this routine to see the exact dose differences, on a pixel-by-pixel basis, between two images. The output of this routine provides a difference image and a difference histogram. You can set an acceptable threshold (e.g. + -3%) and the software will tabulate the number and percent of pixels exceeding your tolerance in red, and cold pixels exceeding your tolerance in blue. Then change your threshold and watch as the analysis is recalculated in an instant. You can also view a Subtraction Histogram and/or Subtraction 3D Surface Plots.

This routine gives you the ability to compare step and shoot to sliding window techniques; compare treatment with different numbers of beams; compare plans delivered at different dose rates; or compare plans from two different types of treatment planning systems.