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Visual comparisons between shape prior based on PCA and SSC in four cases. (First column) a liver with a large region of tumor in the posterior portion of the right lobe. (Second column) a liver that is adjacent to the heart. (Third column) a liver that is adjacent to the kidney. (Forth column) a liver with a tumor in the interior portion of the left lobe. Notice the SSC shape prior has much less errors compared with PCA shape prior.
