Complementary diagnostic value of conventional ultrasound and contrast-enhanced magnetic resonance imaging for post-hepatectomy hepatocellular carcinoma surveillance

Figure 2 Time distribution of first recurrence detection by imaging modality. Bar chart showing which imaging modality first detected recurrence among the 66 cases detected by the combined approach. Contrast-enhanced magnetic resonance imaging (CE-MRI) was the first modality to detect recurrence in 51 cases (77.3%, blue bar), ultrasound (US) was first in 11 cases (16.7%, orange bar), and both modalities detected recurrence simultaneously in 4 cases (6.1%, light blue bar). The median time advantage of CE-MRI for first detection was 3.2 months (range, 1.5-6.0 months) compared with subsequent detection by US. IQR: Interquartile range.