Predictive value of a constructed artificial neural network model for microvascular invasion in hepatocellular carcinoma: A retrospective study

Figure 1 Representative examples of hepatocellular carcinoma magnetic resonance imaging radiological signs. A: Axial portal venous phase image: A high-signal ring surrounding the tumor lesion edge in the left lobe of the liver, demonstrating good continuity, indicative of a complete pseudocapsule; B: Axial delayed phase image: A high-signal ring around the tumor lesion edge in the right lobe of the liver with interrupted continuity, suggesting an incomplete pseudocapsule; C: Axial T2-weighted imaging image: Irregular liver margin and diffuse reticular slightly low-signal change of the liver parenchyma, characteristic of cirrhosis; D: Axial arterial phase image: Thickened and tortuous enhanced blood vessels within the tumor lesion in the right lobe of the liver, representing tumor vessels; E: Axial T2-weighted imaging image: Irregular patchy high-signal region within a large tumor, suggesting areas of cystic degeneration or necrosis; F: Axial delayed phase image: Corresponding to E, showing no enhancement in the areas of suspected cystic degeneration or necrosis.