Fig. 2
From: How to develop a meaningful radiomic signature for clinical use in oncologic patients
Feature selection is accomplished by applying several methods in a cascade manner. A typical workflow in the first phase permits only stable features to be forwarded, then a zero or near-zero variance method is removing useless features, then a correlation analysis is removing redundant features and finally a more sophisticated method like maximum relevance minimum redundancy (mRMR) or recursive feature elimination (RFE) is used to craft the final Radiomic signature