ECO 2 Ultrasound Diagnostic System
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Soft tissue:
Describes low fat content tissue that does not contain calcifications or large gas-filled spaces.
Scanned: (auto-scan)
Refers to the steering of successive burst through the field of view, e.g. B mode.
Unscanned:
Emission of ultrasonic pulses occurs along a single line of sight and is unchanged until the
transducer is moved to a new position. For instance, the PW, and M mode.
TI:
TI is defined as the ratio of the In Situ acoustic power (W.3) to the acoustic power required to raise
tissue temperature by 1°C (Wdeg), TI = W.3/Wdeg.
Three TIs corresponding to soft tissue (TIS) for abdominal; bone (TIB) for fetal and neonatal
cephalic; and cranial bone (TIC) for pediatric and adult cephalic, have been developed for
applications in different exams.
An estimate of the acoustic power in milli-watts necessary to produce a 1°C temperature elevation
in soft tissue is:
Wdeg = 210/fc,for model 1 to 4, where fc is the center frequency in MHz.
Wdeg = 40 K Dfor model 5 and 6, where K (beam shape factor) is 1.0, D is the aperture diameter
in cm at the depth of interest.
MI:
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