Figure 1From: CT brush and CancerZap!: two video games for computed tomography dose minimizationThe welcoming messages and initially uniform image in the CT Brush game. Buttons are available on screen to the player for increasing or decreasing the number of rays (n) or the width of the rays (w) at any time during play. “New” starts a new game. “Refine” allows the user to run the iterative CT algorithm (MART) to convergence. This does not add any dose. The rays are initially all green, meaning no dose has yet been applied along them.Back to article page