VDO MG 2100 Dokumentacja Pobierz pdf (Strona 38)

38 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1

Chapter 4: How the Vevo 2100 Imaging System works

M-Mode overview

M-Mode is used primarily to measure the movement and dimensions of cardiac

structures such as chambers and walls.

M-Mode works fundamentally differently than B-Mode. Where B-Mode uses

multiple scanning beams to create its image, M-Mode uses just one.

So, when you have guided your transducer beam to the depth that gives you a

proper cross-section of the heart, you can then set M-Mode to lay its single beam

across that cross-section. In effect, it is like positioning a tight string through the

heart, and recording the movement of the heart structure cross-sections along that

string.

This way, the movement of the heart structures move up and down that single

line so you can then take measurements along that line over time. These

movements over time are the waves that you see in the M-Mode image.

Related information

 Mode window workspace (page 44)

 Acquiring M-Mode images (page 225)

 Analyzing M-Mode images (page 235)

PW (Pulsed Wave) Doppler Mode overview

PW Doppler Mode (Pulsed Wave Doppler) is an ultrasound mode you can use to

measure the velocity and direction of flow. The Vevo software presents the

detected PW Doppler signal as both a spectral image in the display window as

well as an audio output through the system speakers.

Related information

 Mode window workspace (page 44)

 Acquiring PW Doppler Mode images (page 246)

 Acquiring PW Tissue Doppler Mode images (page 260)

 Analyzing PW Doppler Mode images (page 262)

Color Doppler Mode overview

Color Doppler Mode uses Doppler principles to determine the mean velocities of

blood within the region of interest. The system then applies color that represents

these various velocities under the convention of BART (Blue=Away

Red=Toward).

This mode is useful for bloodflow applications such as:

 Distinguishing non-vascular tissue structures from vascular tissue structures

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VDO MG 2100 Dokumentacja Strona 38