Table 1.

Phantom experiments: sonication characteristics and results. The power was fixed and sonication proceeded until a temperature rise of 15°C above baseline temperature was achieved. Average measurements of the 5°C and 10°C contours are given. In addition, the temperature rise rate is calculated over the initial 10 seconds after ultrasound is turned on for each of the three conditions. In these experiments, on average, the steered temperature rise rate is 83.5% of that measured from the static condition.

Type	Not Steered	Steered	Static
Number Sonications	4	6	6
Sonication Power (W)	74.0	74.0	74.0
Length >5°C (cm)	2.11 ± 0.15	0.59 ± 0.06	0.44 ± 0.07
Width >5°C (cm)	1.30 ± 0.11	0.61 ± 0.03	0.57 ± 0.06
Area >5°C (cm2)	2.05 ± 0.10	0.33 ± 0.03	0.26 ± 0.03
Length >10°C (cm)	1.38 ± 0.35	0.30 ± 0.06	0.24 ± 0.06
Width >10°C (cm)	0.60 ± 0.03	0.35 ± 0.04	0.28 ± 0.08
Area >10°C (cm2)	0.73 ± 0.19	0.10 ± 0.012	0.075 ± 0.018
Sonication Time (sec)	101 ± 24	14.0 ± 1.3	12.4 ± 1.7
Energy (J)	7480 ± 1787	1039 ± 99	921 ± 125
Temperature Rise Rate (°C/sec)	0.51 ± 0.05	1.15 ± 0.14	1.38 ± 0.05