ECO 3 EXPERT Ultrasound Diagnostic System
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Display and Report
Located on the upper middle section of the system display monitor, the acoustic output display
provides the operator with real-time indication of acoustic levels being generated by the system.
For Scan
Only display and report MI, and start from 0.4 if maximum MI > 1.0, display in increments of 0.2.
Below is a simple guideline for the user when TI exceeds one limit exposure time to 4(6-TI)
minutes based on the ‘National Council on Radiation Protection. Exposure Criteria for Medical
Diagnostic Ultrasound: I. Criteria Based on Thermal Mechanisms. Report No.113 1992’.
Operator Control Features:
The user should be aware that certain operator controls may affect the acoustic output. It is
recommended to use the default (or lowest) output power setting and compensate using Gain
control to acquire an image. Other than the output power setting in the soft-menu, which has the
most direct impact on the power; the PRF, image sector size, frame rate, depth, and focal position
also slightly affect the output power. The default setting is normally around 70% of the allowable
power depending on the exam application mode.
Controls Affecting Acoustic Output
The potential for producing mechanical bioeffects (MI) or thermal bioeffects (TI) can be influenced
by certain controls.
Direct: The Acoustic Output control has the most significant effect on Acoustic Output.
Indirect: Indirect effects may occur when adjusting controls. Controls that can influence MI and TI
are detailed under the bioeffect portion of each control in the Optimizing the Image chapter.
Always observe the Acoustic Output display for possible effects.
Best practices while scanning
HINTS: Raise the Acoustic Output only after attempting image optimization with controls that have
no effect on Acoustic Output, such as Gain and STC.
WARNING: Be sure to have read and understood control explanations for each mode
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