High intensity focused ultrasound in clinical tumor ablation

Figure 6 Dynamic contrast-enhanced gradient-echo T1-weighted magnetic resonance images (180/6. 0, 90° flip angle, 128 × 256 matrix, 10-mm-thick sections, 2-mm intersection gap, one signal acquired, and 18-s acquisition time) obtained with breath holding in 48-year-old man who underwent high-intensity focused ultrasound ablation for advanced pancreatic cancer. The tumor was 4.5 cm × 4.5 cm in diameter and located in the body of the pancreas. A: Image obtained before high-intensity focused ultrasound shows the blood supply in the pancreatic lesion (arrowhead); B: Image obtained 2 wk after high-intensity focused ultrasound shows no evidence of contrast enhancement in the treated lesion (arrowhead), which is indicative of complete coagulation necrosis in the pancreatic cancer.