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3. System overview > 3.4. Technical specifications
3.4.1. Ultrasound field distributions
The ultrasound field distribution was characterised by performing hydrophone measurements with
a Sonalleve system at the nominal focus with 20W acoustic power. Hydrophone needle was moved
in order to measure pressures in both coronal and axial planes. Y-axis is parallel to the beam axis.
Typical values for the dimensions of the focal spot are shown in the table below. Typical temporal-
average intensities are shown in figures below.
Frequency
0.85 MHz
1.0 MHz
1.2 MHz
1.44 MHz
Fig. 13: Typical temporal-average intensities ITA (x=0, y, z=0) at 0.85 MHz
Instructions for Use
109745C2 / 02-2022
6dB x-axis (mm)
2.3
1.9
1.6
1.3
6dB y-axis (mm)
17.5
14.7
12.3
10.0
6dB z-axis (mm)
2.3
1.9
1.6
1.3
42 (192)
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