Table 2.

In vivo porcine experiments: sonication characteristics and results. The temperature rise rate was calculated as the temperature rise per second over the first 10 second interval after ultrasound was turned on. The temperature rise rate for the steered condition was 95% that of the breathhold sonications, while both were substantially lower than that obtained in muscle tissue. For each ablation, the ablation power was 150 acoustic W, applied for 10 seconds (1.5 kJ).

Type	Steered Liver	Breath-hold Liver	Breath-hold Muscle
Number of Ablations	15	14	3
Temperature Rise Rate (°C/sec)	0.57 ± 0.13	0.60 ± 0.18	1.19 ± 0.15