User Manual

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9 Acoustic output description
The contents of this chapter for the entire system (including host, probe, accessories and
peripherals), in order to provide relevant information to the operator output sound and how to use
ALARA control principle of irradiation time and other important safety information. In addition,
this chapter also includes information related to the system of acoustic output real-time display.
Please read this chapter carefully before use.
9.1 Biological effect
It is generally believed that the diagnosis with ultrasound is safe. So far,thereisnoanyreports
about ultrasonic cause bodily injury.
In spite of this, we can not arbitrarily believe all the ultrasonic is absolutely safe. Studies have
shown that ultrasound with high intensity is harmful to animal body.
In recent years, with the rapid development of ultrasound technology, people are increasingly
concerned about the application of ultrasonic technique in diagnosis and mayleadtothepotential
risk of biological effect.
9.2 Caution use declaration
Although there is no confirmation of diagnosis by ultrasonic instrument can cause the patient to
produce biological effect, but there are still likely to prove the biological effects of existing
applications in the future. So we must be careful to use ultrasound, exert their clinical effect in the
premise to obtain the necessary clinical information, avoid long time using high intensity
ultrasound the.
9.3 ALARA principle(As Low As
Reasonably Achievable)
The use of ultrasonic should be carried out under the premise of ensuring theALARAprinciple,
obtain diagnostic information, as far as possible will not lead to the lowest level of the biological
effects of energy. The ultrasonic energy depends on the size of the output intensity and irradiation
time. The strength of ultrasonic wave need different patients and clinical cases are not the same.