Fig. 3.

(a) Optimization of hyper-parameters for random forests: number of trees (41) and minimum leaf size (17); (b) ROC curve for test data, with AUC of 0.89; (c) Out-of-bag feature importance; (c) Radiomic model test results for distant metastases using: all train samples (148 patients, yellow); samples filtered by our artifacts detection algorithm (107 patients, blue) and samples filtered visually (100 patients, green). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)