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Table 1 Estimated focal pressures of H-108 in water and in gel using a modified KZK equation [17]

From: The effects on thermal lesion shape and size from bubble clouds produced by acoustic droplet vaporization

Input voltage

V

In water

In gel

Compressional pressure

MPa

Rarefactional pressure

MPa

Compressional pressure

MPa

Rarefactional pressure

MPa

20

7.3

− 5.3

5.0

− 3.7

25

10.4

− 6.8

7.0

− 4.7

30

12.2

− 7.6

8.3

− 5.3

35

15.6

− 8.7

10.6

− 6.1

40

18.9

− 9.7

12.8

− 6.8

45

23.0

− 10.7

15.5

− 7.5

150

136.9

− 15.9

105.8

− 13.8

  1. The water density, the sound speed and sound attenuation coefficient in water used for calculations were 993 kg/m3, 1523.7 m/s [18] and 0.04 Np/m [19], respectively. The phantom density, sound speed and sound attenuation coefficient in phantom used were 995 kg/m3 [20], 1543 m/s [20] and 6.8 Np/m [20], respectively