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Radiomics feature selection using LASSO. (a) Selection of the optimal value of lambda (λ). Tuning log(λ) selection in the LASSO model used to perform 5-fold cross-validation via the minimum criteria. (b) The LASSO coefficient profiles included 1230 features. The vertical line was drawn at the selected log(λ) above, and 6 features with nonzero coefficients were finally identified.
