Konica Minolta SONIMAGE HS2, Руководство по эксплуатации

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10 .1 .1 Transducer Technical Data and Acoustic Output
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Transducer Technical Data and Acoustic Output
Display Resolution and Measurement Accuracy
MI values displayed on the screen are incremented by 0 .01 (when MI is less than 0 .1) or 0 .1 (when MI is 0 .1 or
greater), and TI values are incremented by 0 .1 .
It is important to note that displayed indices are obtained through measurement, and are subject to measurement
errors. Specific measurement uncertainties for acoustic output, acoustic pressure, and center frequency are 19 %,
9 .2 %, and 0 .58 % respectively . Measurement precision for ultrasonic power, peak rarefactional pressure, and center
frequency from a standard test transducer/driver combination is 19 %, 9 .3 %, and 0 .62 % respectively . The reported
values assume 90 % population (P) at 90 % confidence level (γ).
Definitions for these parameters can be found in "9.9 References for MI/TI".
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Default ultrasound output level
The tolerance for the ultrasound output level differs according to the exam type.
In order to avoid the danger of unnecessary high output ultrasound being inadvertently irradiated from the transduc-
er, set the default transmit level to any value lower than the maximum settable value (100 %) .
When changing the patient or the exam type, set the output level to the default setting by selecting an appropriate
EXAM .
Default ultrasound output level
Transmit level of all EXAMs 75 %
10 .1 Acoustic Output Reference