Duplex

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6 Terms

1
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What does duplex mean?

Doing two things at the same time.

2
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Duplex is an older term used to describe what?

The performance of PW Doppler and grayscale imaging at the same time.

3
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What are the three setting options for Duplex imaging?

  1. Dedicated Doppler

  2. Updated Doppler

  3. Simultaneous Doppler

4
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What is dedicated Doppler?

Where the 2-D image is frozen and the machine is 100% dedicated to Doppler. This gives the best spectral display.

5
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What is updated Doppler?

Where the 2-D image is updated at a variable rate. This machine is 90% dedicated to Doppler and it gives us good spectral trace.

6
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What is simultaneous Doppler?

Where the 2-D image and the Doppler signal are both “live” (sampled back and forth fast enough to appear live). This reduces image rate though and only dives us an acceptable spectral trace.