User guide

Chapter 3: Imaging 27
Imaging
3 Press the MMODE key.
The time scale above the trace has small marks
at 200ms intervals and large marks at
one-second intervals.
4 Do any of the following as needed:
• Select the sweep speed (Slow, Med,
or Fast).
•Press the
UPDATE key to toggle between the
M-line and M-Mode trace.
• If using a duplex layout, press the
MMODE
key to toggle between the full-screen
M-line and the duplex layout.
To set a duplex layout, see “Presets
setup” on page 22.
CPD and color Doppler imaging
Color power Doppler (CPD) and color Doppler
(Color) are optional features.
CPD is used to visualize the presence of detectable
blood flow. Color is used to visualize the presence,
velocity, and direction of blood flow in a wide range
of flow states.
To display the CPD or Color image
1 Press the COLOR key.
A ROI box appears in the center of the 2D
image.
2 Select CPD or Color.
The current selection also appears in the upper
left-hand screen.
The Color indicator bar on the upper left-hand
screen displays velocity in cm/s in Color imaging
mode only.
3 Using the touchpad, position or resize the ROI
box as needed. Press the
SELECT key to toggle
between position and size.
While you position or resize the ROI box, a green
outline shows the change. The ROI box indicator
on the left-hand screen shows which touchpad
function is active.
4 Adjust controls as desired. See “CPD and
Color controls.”
CPD and Color controls
In CPD or Color imaging, you can set the following
on-screen controls.
Color, CPD Toggle between CPD and Color.
The current selection appears in
the upper left-hand screen.
Color
Suppress
Shows or hides color information.
You can select Show or Hide
while in live or frozen imaging. The
setting shown on-screen is the
current selection.
Flow
Sensitivity
The current setting appears
on-screen.
• Low optimizes the system for
low flow states.
• Med optimizes the system for
medium flow states.
• High optimizes the system for
high flow states.
PRF Scale Select the desired pulse repetition
frequency (PRF) setting by
pressing the control keys.
There is a wide range of PRF
settings for each Flow Sensitivity
setting (Low, Med, and High).
Available on select transducers.
Wall Filter Settings include Low, Med, and
High.
Available on select transducers.
Steering Select the steering angle setting of
the color ROI box (-15, 0, or
+15). If adding PW Doppler, see
“PW Doppler controls” on
page 29.
Available on select transducers.