Figure 2.

Inputs to the network were generated by obtaining a 4 × 4 × 2 cm three-dimensional wedge of the subpleural regions of the bottom half of the lungs for each patient. Left: an example input slice with two example virtual wedge regions highlighted. Wedges were discarded if they contained no pleural space or no lung as defined by an automatically generated lung mask (middle). On average, 516 wedges were generated for each patient, totaling more than 114,000 wedges. Right: 18 example wedges from a patient. The red squares are sample wedges.