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Table 2 Summary of in vitro therapeutic power (MinTD) results

From: Deep bleeder acoustic coagulation (DBAC)—Part I: development and in vitro testing of a research prototype cuff system

Phantom Cluster position Cluster depth (cm) Number of Tx tiles HIFU focus (offset relative to center of cluster) (mm) Input acoustic power (W) Focal intensity (W/cm2)a T (°C)
X Y Z
7.5 cm Lower 3.75 2 −0.08 0.26 0.11 57.2 316 45–47
7.5 cm Middle 3.75 2 0.04 0.01 −0.02 56.4 316 49
15 cm Lower 5.5 3 0.55 −0.32 −0.83 98.2 316 39–55
15 cm Middle 4.5 3 0.21 −0.06 −0.05 83.8 316 48–51
15 cm Upper 7.5 2 NA NA NA 93.8 316 57–65b
15 cm Lower (B) 7.5 2 NA NA NA 83.9 316 35–42
25 cm Lower 12.5 3 0.12 −0.33 −0.3 167.0 316 43–49
25 cm Middle 8.0 3 −1.7 1.2 0.48 168.4 316 16–45c
25 cm Middle (B) 8.0 3 −0.74 −0.44 −0.02 144.7 316 42–48
25 cm Upper 5.0 3 −0.61 −0.04 1.0 134.0 316 55–62d
  1. NA coordinates not available due to data recording error
  2. aIntensity value spatially averaged over focal dithering pattern cross-section for each Tx beam focus then derated for attenuation along each beam path for beams; Intensities for all foci then superposed
  3. bAtypical curve shape with enhanced echogenicity observed in the TMM around the cluster
  4. cCoordinate value entered incorrectly
  5. dStrong oscillation present in TC readings; possibly indicating viscous heating artifact (see Fig. 16d above)