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. Author manuscript; available in PMC: 2014 Oct 2.
Published in final edited form as: Phys Med Biol. 2013 May 28;58(12):4195–4204. doi: 10.1088/0031-9155/58/12/4195

Figure 2.

Figure 2

(left) Experimental setup with the Washington University 4D Phantom and a clinical LINAC. The resin tumor model rests on a solid water slab that is mounted to the motion stages of the phantom. The treatment field light is on to show the outline of the radiation field. (right) Screenshot of the Graphical user interface (GUI) for real-time visual feedback during tracking operation. Each green arrow corresponds to a landmark, the red arrow to the average landmark position (which is fed to the predictor). The window/level of the image was adjusted to enhance the display contrast for the tumor model.