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the more acoustic output power increased over a period of time.
■ The receiver control
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
5.2.5 Acoustic Power Settings
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 patient is created or the
application mode is changed, the system will retrieve the default settings. You can also reset the
parameters.
5.2.6 ALARA
It is required to practice ALARA when using ultrasound energy. Practicing ALARA ensures that the
total energy level is controlled below a low level at which bioeffects are not generated while
diagnostic information is being accumulated. The total energy is controlled by output intensity and
total radiation time. The output intensity necessary for examinations differs depending on the patient
and clinical case.
Not all examinations can be performed with an extremely low level of acoustic energy. Controlling
the acoustic level at an extremely low level leads to low-quality images or insufficient Doppler
signals, adversely affecting the reliability of the diagnosis. However, the sound power which is used
greater than the actual needs does not contribute to improving the quality of diagnostic information
either, it will increase the risk of biological effects.
The operator must take responsibility for the safety of patients.
5.3 Electromagnetic Compatibilities
Electromagnetic compatibilities are the abilities of the system or equipment to operate normally in
the electromagnetic environment and not to radiate any electromagnetic interruptions to any other
objects which are in the same environment.
This system is designed in accordance with the current EMC requirement. And the ultrasound image
will degrade instantly if the system is used in the electromagnetic field environment. If the
degradation of the image is found, it is recommended to inspect the operation environment to confirm
the radiation source.
