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Table 1 Applied acoustic power and energy, estimated thermal dose volume (V240EM), and maximum recorded tissue temperature for 27 separate sonications using from 2 mm to 12 mm diameter cells for exposure durations ranging from 16 to 36 s in ex-vivo lamb legs (n = 6)

From: Value of diffusion-weighted imaging for monitoring tissue change during magnetic resonance-guided high-intensity focused ultrasound therapy in bone applications: an ex-vivo study

Cell diameter/exposure duration Power (W) Energy (kJ) V240EM (cm3) Maximum temperature (°C)
2 mm/16 s 90 1.44 0.83 81.2
120 1.92 2.63 67.2
150 2.40 3.06 94.9
190 3.04 3.57 112.4
190 3.04 2.87 101.4
4 mm/16 s 20 0.32 0.00 42.1
40 0.64 0.15 61.7
60 0.96 0.16 67.2
80 1.28 0.65 71.6
120 1.92 0.74 77.1
150 2.40 4.10 92.6
160 2.56 2.28 113.6
190 3.04 2.59 98.9
190 3.04 4.12 113.2
8 mm/20 s 20 0.40 0.03 62.5
40 0.80 0.39 58.8
40 0.80 0.61 54.6
60 1.20 1.16 69.1
80 1.60 0.90 68.8
120 2.40 3.36 77.1
150 3.00 5.14 78.7
150 3.00 4.38 81.8
12 mm/36 s 20 0.72 0.21 59.7
40 1.44 2.72 89.9
60 2.16 3.92 74.1
80 2.88 5.46 81.2
80 2.88 5.75 81.1
  1. In each case, the highest power exposure was delivered in two different samples