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(3) Default setting for acoustic power
24.2.5 Output display
This system displays thermal and mechanical indices in real-time. The display
conforms to the "Standard for Real-Time Display of Thermal and Mechanical Output
Indices on Diagnostic Ultrasound Equipment", which is the voluntary standard of AIUM
(American Institute of Ultrasound in Medicine) and NEMA (National Electrical
Manufacturers Association).
The display is intended to give the user information related to the likelihood of bioeffects
from tissue/bone heating (TI) and cavitation (MI). The user should practice ALARA (As
Low As Reasonably Achievable) with respect to these indices.
The absolute maximum acoustic intensity with any transducer/system combination will
remain below the FDA (Federal Food and Drug Administration) limit of 720 mW/cm
I
and either 1.9 MI or 190 W/cm
spta
For additional information on bioeffects beyond that contained in this labeling, contact
your TOSHIBA service representative. As further information becomes available on the
potential for bioeffects, these displays may change.
Information from AIUM is included in the operational information for MI and TI. You are
strongly encouraged to become familiar with this information and to understand the
potential for bioeffects. Always practice ALARA and avoid unnecessary use of
ultrasound.
2
, I
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sppa
No. 2B771-004EN*M
24-14
2
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