Best, worst, and average NDCG plotted for the dataset containing 79 liver lesions, using (a) proposed (c) Gilhuijs's, and (e) Levman's features. Organ border knowledge is used in all methods. In (a), for K = 5, 10, and 15, the combined distance achieved an average NDCG score of 84%, 85%, and 85%, respectively; In (c), for K = 5, 10, and 15, the combined distance achieved an average NDCG score of 78%, 79%, and 81%, respectively; In (e), for K = 5, 10, and 15, the combined distance achieved an average NDCG score of 81%, 82%, and 84%, respectively. Best, worst, and average NDCG plotted for the dataset containing 58 lung nodules, using (b) proposed (d) Gilhuijs's, and (f) Levman's features. In (b), for K = 5, 10, and 15, the combined distance achieved an average NDCG score of 84%, 85%, and 85%, respectively; In (d), for K = 5, 10, and 15, the combined distance achieved an average NDCG score of 75%, 76%, and 77%, respectively; In (f), for K = 5, 10, and 15, the combined distance achieved an average NDCG score of 73%, 75%, and 78%, respectively.

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