Cirs Doppler String Phantom 043, Руководство пользователя, Страница: 12 / 32

9
Selecting Velocities and Waveforms
Constant Speeds
The following example demonstrates how to generate various Doppler target velocities:
To create a constant flow at 52 cm/sec the following steps must be taken:
1. Turn the controller on or enter
<Ctrl> Z
to restart the program.
2. Issue
U
or
D
to select the type of fluid in the tank.
3. Issue
C
to select Constant speeds.
4. Issue
S52
to select a speed of 52 cm/sec.
Note
: Only whole numbers are allowed for velocities.
Test Waveforms
To select a changing velocity profile such as a sine wave that ranges from -100 cm/sec to +100 cm/sec the fol-
lowing steps must be taken:
1. Turn the controller on or enter <Ctrl> Z to restart the program.
2. Issue U or
D
to select the type of fluid in the tank.
3. Issue T to select Test waves. The screen displays '100 Sine'.
4. To select a different waveform issue U to move up the list. Continue issuing
U
or
D
until the desired
waveform is displayed.
5. Issue an
<Enter>
command to execute the selected waveform.
Human Waveforms
To select a human Doppler waveform such as the "Common Carotid' waveform the following steps must be
taken:
1. Turn the controller on or enter
<Ctrl> Z
to restart the program.
2. Issue
U
or
D
to select the type of fluid in the tank.
3. Issue
P
to select Physiological waves. The screen displays 'Common Carotid'.
4. To select a different waveform issue
U
to move up the list. Continue issuing
U
or
D
until the desired
waveform is displayed.
5. Issue an
<Enter>
command to execute the selected waveform.
Flow Reversal
To reverse the flow direction of any constant speed or waveform first execute the desired speed or waveform
and then issue an R. The target string will stop and then accelerate up to the desired speed or waveform in the
opposite direction.
Setting up for Quality Control Testing
The following example demonstrates how to test ultrasound machines for Doppler accuracy at 100 cm/sec at
the end of the manufacturing process.
1. Insert the ultrasound machine’s probe into the holder on the tank.
2. Prepare the ultrasound machine to send Doppler data to the process controller machine. Enter the
insonation angle to the process controller if not already done.
3. Turn on the Doppler phantom or issue a cold start with
<Ctrl> Z.