User's Manual

Rev.1.01
2022. 03.
47 / 96
Doc # : BN-SM-EOP-01
- Direct Controls
The direct control of the acoustic output of this system is adjusting voltage size. But
its maximum acoustic output shouldn't be more than displayed acoustic output limit
in any modes.
- Indirect Controls
The controls that indirectly affect output are many imaging parameters. These are
operating modes, frequency, focal point number/position, image depth and pulse
repetition frequency (PRF).
The operating mode determines whether the ultrasound beam is scanning or non-
scanning. Thermal effect is closely connected to M Mode, PW and Color Mode.
Acoustic attenuation of tissue is directly related to transducer frequency.
The focal point number and position is related to active aperture of transducer and
beam width.
For the pulse repetition frequency (PRF), the higher the PRF, the more acoustic output
power increased over a period of time.
- Receiver Controls
The receiver control does not affect the acoustic output, including gain, dynamic range,
and image processing, etc. Therefore, in the image optimization, should adjust the
receiver control to optimize images firstly, the second are through direct control and
indirect control.
When acquiring images, it is recommended to use the default (or as low as possible)
acoustic output location and use the gain control to compensate. The default setting
is commonly 70% of maximum allowed acoustic output value, which will not cause
harm to the operator, and for the probe is the most effective value.
6.2.4 Acoustic Power Setting
The ultrasound system has been preset the parameters for each exam mode with
different probes before shipment. When the ultrasound system is powered on, a new