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. Author manuscript; available in PMC: 2016 Apr 21.
Published in final edited form as: Phys Med Biol. 2015 Mar 27;60(8):3175–3191. doi: 10.1088/0031-9155/60/8/3175

Figure 4.

Figure 4

The absolute error in the neural network basis material thickness estimates using varying numbers of hidden processing elements in (a) simulations, (b) collimated experiments, and (c) uncollimated experiments. The absolute errors reached their minimum when nH = 3 in simulations, nH = 5 in collimated experiments, and nH = 3 in uncollimated experiments.