User guide

30 Adjusting depth and gain
Adjusting depth and gain
To adjust depth
You can adjust the depth in all imaging modes but
the trace modes. The vertical depth scale is marked
in 0.5 cm, 1 cm, and 5 cm increments, depending
on the depth.
 Press the following keys:
•
UP DEPTH key to decrease the displayed
depth.
•
DOWN DEPTH key to increase the displayed
depth.
As you adjust the depth, the maximum depth
number changes in the lower right screen.
To adjust gain automatically
 Press the AUTO GAIN key. The gain adjusts each
time you press this key.
To adjust gain manually
 Press the gain keys :
In each pair of gain keys, the left key decreases
gain, and the right key increases gain.
•
NEAR adjusts the gain applied to the near
field of the 2D image.
•
FAR adjusts the gain applied to the far field of
the 2D image.
•
GAIN adjusts the overall gain applied to the
entire image. In CPD or Color imaging, the
GAIN keys affects the color gain applied to
the region of interest (ROI) box. In PW and
CW Doppler imaging, the
GAIN keys affect
Doppler gain.
Near and far correspond to the time gain
compensation (TGC) controls on other
ultrasound systems.
Freezing, viewing frames,
and zooming
To freeze or unfreeze an image
 Press the FREEZE key.
On a frozen image, the cine icon and frame
number appear in the system status area.
To move forward or backward in the cine
buffer
 Freeze the image, and do one of the following:
• Press the keys. The left key moves
backward, and right key moves forward.
• Use the touchpad. Left moves backward,
and right moves forward.
•Press the
LEFT ARROW and RIGHT ARROW keys.
The frame number changes as you move
forward or backward. The total number of
frames in the buffer appears on-screen in the
system status area.
To zoom in on an image
You can zoom in 2D and Color imaging. You can
freeze or unfreeze the image or change the imaging
mode at any time while zooming.
1 Press the
ZOOM key. A ROI box appears.
2 Using the touchpad, position the ROI box as
desired.
3 Press the
ZOOM key again.
The image in the ROI box is magnified by 100%.
4 (Optional) If the image is frozen, use the
touchpad or arrow keys to pan the image up,
down, left, and right. (You cannot pan in Dual.)
To exit zoom, press the
ZOOM key again.