GE Vivid S70, User Manual

Page: 41 / 709

Acoustic output
Vivid S70 / S60
–
User Manual
2-9
BC092760-1EN 01
Changing imaging modes
Acoustic output depends on the imaging mode selected. The
choice of mode (2D, M-Mode, Doppler or Color Flow)
determines whether the ultrasound beam is stationary or in
motion. This greatly affects the energy absorbed by the tissue.
See ‘Image Optimization’ on
page 5-1
, for complete information
on changing imaging modes.
When operating in a combined mode, such as 2D and M-Mode,
the total acoustic output comprises contributions from each
individual mode. Depending on the modes in use, either or both
output indices may be affected.
The user can override the default settings, but care should be
taken to observe the displayed MI and TI values.
Power
It is possible to change the power in all operating modes so that
the operator can use the ALARA principle.