Computed tomography-based radiomics to predict early recurrence of hepatocellular carcinoma post-hepatectomy in patients background on cirrhosis

Figure 3 Example of the typical computed tomography images of the semantic features. A: The tumour capsule is observed in the direction indicated by the arrow, with a ring-like high-density appearance around the tumour in the portal phase; B: Smooth tumour margins are observed in the direction of arrows; C: Peritumoural enhancement is visible in the direction of the arrow, characterised by a patchy, high-density area outside the tumour range in the arterial phase; D: Intratumour necrosis within the tumour is observed in the direction of the red arrow, demonstrating a low-density area in the arterial phase. Additionally, the yellow arrow highlights intratumour vascularity, appearing as a linear high-density area within the arterial phase.