VDO MG 2100 Dokumentacja Strona 260

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260 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1
Chapter 38: Acquiring PW Tissue Doppler Mode images
Acquiring PW Tissue Doppler Mode images
PW Tissue Doppler Mode uses PW Doppler ultrasound to measure the velocity
function of myocardial tissue, typically during the diastolic phase of the cardiac
cycle.
This chapter shows you how to acquire PW Tissue Doppler Mode images.
WARNING: High levels of ultrasound energy can damage tissue. Do not
touch the transducer when acoustic power could be generated.
In this chapter
Typical PW Tissue Doppler Mode image acquisition session.......................................260
Analyzing PW Tissue Doppler Mode images .................................................................261
Typical PW Tissue Doppler Mode image acquisition session
You acquire PW Tissue Doppler Mode images exactly the same way as you
acquire PW Doppler Mode images. The only difference is that the Vevo 2100
Imaging System processes the data in a slightly different way.
In PW Doppler Mode the system requires higher frequency signals to display the
fast-moving vascular flows. In PW Tissue Doppler, the system filters out higher
frequency signals so it can more accurately display the lower frequency signals
that define slower moving myocardial tissue.
f To acquire a PW Tissue Doppler Mode image:
Follow the acquisition procedure defined in Typical PW Doppler Mode image
acquisition session (page 246).
Press
Tissue
instead of
PW
when you begin the acquisition.
Set your sample volume as defined in Setting the PW Doppler sample volume
(page 257).
Chapter 38
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