NOTE
Flow in the direction of the arrow will always be depicted above the baseline. Flow against the
direction of the arrow will always be depicted below the baseline.
3. Tap “Start Spectrum” to start the spectral trace. If you do not see a trace, adjust the position of the sample
volume.
4. To adjust the position of the sample volume:
a. Hold and drag the arrow, which will automatically pause the spectrum and restart B-mode reference image.
b. Tap the Update B-mode button to manually pause spectrum and restart B-mode.
5. To adjust scroll speed of trace, tap the “Slow Scroll/Fast Scroll” button.
6. To adjust the velocity scale, tap the button Low Flow/High Flow button or drag baseline.
7. To add annotations, freeze the image and tap the annotations button.
8. To add measurements, freeze the image and select linear measurements.
NOTE
Annotations and measurements may only be added to the Spectral trace region.
9. Velocity measurements will be represented in cm/s as Peak Systolic Velocity (PSV), the value of the vertical
distance from the baseline first caliper dot, and End Diastolic Velocity (EDV), the value of the vertical distance
from the baseline of the second caliper dot.
10. The difference in time between the left and right ends of the caliper will be represented as time (t) in seconds.
11. To save a Pulsed Doppler image, freeze then press the capture button.
NOTE
To automatically rotate the arrow 180 degrees, tap the invert button when the spectrum is
live. If the button is tapped when the spectrum is not live, changes will take effect when the
spectrum is restarted.
Pulsed-Wave Doppler in Abdomen
For Abdomen and Abdomen Deep, the pulsed wave doppler mode has the following differences compared to what
was previously discussed:
• There is no angle correction.
• There is no inversion.
• To move the Sample Volume around, the user can hold on the blue dot . Note: holding in the general vicinity of
the blue dot will move the gate as well.
Pulsed-Wave Doppler in Cardiac
For Cardiac presets the pulsed wave doppler mode has the following differences geared towards Cardiac
applications:
• There is no angle correction.
• There is no inversion.
• Similar to Fetal Heart Sounds, to move the Sample Volume around, the user can hold on the blue dot . Note:
holding in the general vicinity of the blue dot will move the gate as well.
Using Spectral Pulsed-Wave Doppler Mode
Using Modes 34
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