CTH and adenoma: In both the centers, showing AVmean ≤ 10 HU, AVmin ≤ 0 HU, and CTH negative pixels ≥ 10% (all P<0.001), and In center A and B, the AUC of AVmean, AVmin, CTH negative pixels for the differential diagnosis of adenoma and non-adenoma was 0.941~0.956 and 0.952~0.958, respectively.