Fig. 3. 55-year-old man with histologically confirmed gastric cancer and liver metastasis.

A, B. Contrast-enhanced axial CT images acquired during portal phase reveal marked enhancing wall thickening in antrum of stomach (arrows in A), suggesting AGC. Liver metastasis (arrowhead in A) is also noted. Other metastatic nodules in liver (arrowheads in B) and lymph nodes (arrows in B) are also apparent. C. On parametric perfusion map, PS value of primary gastric cancer was 69.32 mL/100 g/min, which is higher than cut-off value of 29.7 mL/100 g/min (arrows). D. Follow-up axial CT image obtained after two cycles of fluorouracil and oxaliplatin (i.e., FOLFOX) chemotherapy reveals marked decrease in size for both hepatic (arrowheads) and lymph node (arrow) metastases, indicating PR. CT = computed tomography