2 S a f e t y a n d Care
2 - 10 [ 1 ] I N S T R U C T I O N S F O R U S E
Indices display in the abbreviated form shown below:
MI: Mechanical Index
TIB: Bone Thermal Index (fetal application)
TIS: Soft Tissue Thermal Index
TIC: Cranial Thermal Index
Transmit Power Control
Adjust the transmit power and the corresponding acoustic pressure delivered
through the transducer to the patient by using the designated control on the
system. It is the main system function that determines the transmitted
intensity of ultrasound for all transducers and imaging modes during real-time
imaging, though it is not the only function that affects the mechanical and
thermal indices. The range and especially the maximum level of the
mechanical and thermal indices differ depending on the transducers. In
addition, each diagnostic exam type has preset values for mechanical and
thermal indices.
Note: Maximum transmit acoustic intensity and the mechanical index for each exam type
are limited in accordance with the United States Food and Drug Administration's (FDA)
recommendations and guidelines. System default transmit intensity and mechanical index
values are always below the FDA recommendations for each exam type. Although some
exam types may default to a condition of maximum allowable transmit power, there are
other system controls or functions that could raise acoustic output levels.
To increase the transmit power:
To increase the transmit power, rotate the FUNCTION SELECT control
to highlight the Tx tab along the bottom of the LCD. Then press
|
Tx Power× on the LCD or rotate the SELECT-R control clockwise.
To decrease the transmit power:
To decrease the transmit power, rotate the FUNCTION SELECT control
to highlight the Tx tab along the bottom of the LCD. Then press
|
Tx PowerØ on the LCD or rotate the SELECT-R control
counterclockwise.
[1] Instructions for Use
Functions Affecting
Acoustic Output 2-12
System Reference
System Presets Ch 3
Additional pages of
LCD selections can be
accessed by pushing
the PAGE control.
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