Acoustic Output Mechanical And Thermal Indices; Mechanical And Thermal Indices - Siemens ACUSON Antares Instructions For Use Manual

2 S a f e t y a n d C a r e
Acoustic Output Mechanical and Thermal
Indices
WARNING: Ultrasound procedures should be used for valid reasons, for the
shortest period of time, and at the lowest mechanical/thermal index setting
necessary to produce clinically acceptable images.
The ultrasound system incorporates an output display of Mechanical and
Thermal Indices to allow you to monitor, and to limit, the amount of
ultrasound energy that is transferred to the patient.
Note: For ultrasound systems distributed in the United States of America, refer to the
Medical Ultrasound Safety ultrasound education program brochure produced by the AIUM
that is included in the System Reference.

Mechanical and Thermal Indices

The ultrasound system displays the Mechanical and Thermal Indices during
real-time imaging, in all imaging modes, when the Mechanical Index or the
Thermal Indices are equal to or exceed a value of 0.4.
Note: During exams using Cadence Contrast Agent Imaging (CCAI), the system always
displays values for the Mechanical Index (MI) and the Maximum of Mechanical Indices
measured at the active focal zones (MIF).
xxx xxxx
Example of the location of mechanical and thermal indices on the image screen.
Indices display in the abbreviated form shown below:
MI: Mechanical Index
MIF: Maximum of the Mechanical Indices measured at the active focal
zones (displayed during CCAI exams only)
TIB: Bone Thermal Index (fetal application)
TIS: Soft Tissue Thermal Index
TIC: Cranial Thermal Index
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