VDO MG 2100 Spezifikationen PDF herunterladen (Seite 265)

Rev 1.1 VisualSonics Vevo 2100 Imaging System Operator Manual 265

Chapter 39: Analyzing PW Doppler Mode and PW Tissue Doppler Mode images

VTI measurement with automatic frequency trace

When you want to measure VTI over a series of cycles, use the automatic

frequency trace feature to instantly plot the caliper points on your frequency

waveform before you apply the VTI measurement.

f To place a VTI measurement with automatic frequency trace:

1. While you view a saved image from the Study Browser or an image that is

acquired but not stored during an image acquisition session, press

Measure

and toggle to view the measurement tools panel.

2. Select the appropriate auto trace option in the Peak or Mean drop-down

boxes as described in Applying automatic traces to the frequency waveform (page

267).

IMPORTANT You must select a Peak and Mean option other than none to activate

the auto-trace functionality for an acquired image.

3. Click the VTI button . The system highlights the button until you complete

your measurement.

4. Along the frequency baseline click on the beginning of a cardiac cycle

waveform to place the initial caliper, then click at the end of the cycle

waveform.

5. Continue adding points at the start and end of cardiac cycle waveforms until

you have selected the range of cycles you want to measure.

6. Right-click to apply your final caliper at the end of the last cycle.

7. The system plots individual caliper points along the range. If you selected the

Show Values and Labels option in the Measurements tab of the Preferences

window, the system displays the measurement value and editable label for

the measurement VTI #, where # is a sequential number.

8. If you want to rename the label and you have selected Show Values and

Labels in the Measurement tab of the Preferences window, type a new name

while the label text is selected, and then click outside the label to commit the

label.

9. If you have selected Show Values and Labels in the Measurement tab of the

Preferences window and you want to move the measurement or move the

label, select either item and then drag and drop it.

Next step

 Reporting your analysis results (page 184)

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VDO MG 2100 Spezifikationen Seite 265