Automatic Optimization; Transmit Power - GE Voluson S6 Basic User Manual

2D Mode
6.2.5 2D Automatic Optimization

6.2.6 Transmit Power

6.2.7 Transmit Focus
6-6
This function will optimize the contrast resolution according to the histogram of the scan area.
The shape of the ROI will depend on the probe, scan depth and scan angle. The primary result
is a value for the lower and upper endpoint of the histogram.
Pressing the [auto] key causes automatic optimization of the gray scale to enhance the
contrast. When the key is pressed again, the optimization according to the histogram will be
updated and remain active.
Double-click the [auto] key to switch off the Automatic Optimization of the 2D mode image.
Remarks:
•
When the Automatic Optimization function is active, the [auto] key is brightly illuminated.
•
When Automatic Optimization is active, an asterisk (* nearby the Gray map number) is
displayed in the B mode Image Info area. (For example: C5 / M7*)
•
The Automatic Optimization is also possible in Pulsed Wave (PW) Doppler mode; 'PW
on page 8-4
Operation'
•
The Automatic Optimization is also possible in 3D/4D mode; 'After the Static 3D
Sectional Planes Acquisition'
•
In CF, CW, PD the optimized settings for the 2D image are kept, but the [auto] function is
disabled.
The [Transmit Power] control governs the acoustic output of the transducer. It shall be set to
the minimum value which still allows well evaluable information. Always keep the power level
and the exposure time AS LOW AS REASONABLY ACHIEVABLE.
Use the [Power] control to adjust the amount of acoustic output.
Remarks:
•
The current value is displayed in the Image Information area on the monitor.
•
The maximum possible acoustic output can be reduced by this control function, if certain
values of Mechanical and Thermal Indices are exceeded.
•
The adjustment of transmit power output changes also the actual output adjustment of all
other modes.
The selected focal zone determines the depth range of optimized sharpness of the ultrasound
beam. The [Foc.Zones] field of the screen displays the current number of focal zones for
transducers which allow changing the number of focal zones.
on page 9-21
Voluson® S6/S8 Basic User Manual
5433669-100 Revision 4