Samsung SONOACE R7 Manual de usuario descargar pdf (Pagina 123)

4-23

Chapter 4 Diagnosis Modes

 PW Spectral Doppler Mode Screen

 Sample Volume

When Sample Volume is on the blood ow of the 2D image, it represents Doppler Spectrum. The size

and depth of Sample volume is displayed in

[mm]

units. Its position is moved with the

Trackball

and

displayed in the xx.xx@yy.yy mm format. The format means that a Sample Volume of ‘xx.xx’ mm size is

located at a depth of ‘yy.yy’ mm.

For example, [email protected] mm means that a Sample Volume of 2.00mm size is located at a depth of

16.07mm.

X

Moving Sample Volume

Use the

Trackball

on the control panel.

X

Resizing Sample Volume

Adjust the Sample Volume size by pressing the

Change

button and using the

Trackball

on the

control panel. Press the

Change

button again to return to the Sample Volume Position Control

screen. The icon showing the two

Trackball

functions (SV Position/SV Size) is shown for a second and

then disappears.

X

Adjusting the angle of Sample Volume

Use the

dial-button on the control panel. If you rotate the dial-button clockwise, the angle

increases from between –70 ~ +70.



HPRF (High PRF) Function

This function measures blood ow for which the speed exceeds the specied limit at a specied depth.

It expands the scale into double the size of the original scale. This function is available only in PW

Spectral Doppler Mode (D Only).

X

Activating HPRF

To activate HPRF, increase the Scale values at the required depth. A The Phantom Gate will appear on

the D Line at a position higher than the sample volume. Once HPRF starts, PRF does not increase even

if you increase the scale value.

X

Finishing HPRF

While HPRF is in use, decrease the scale value by one step to nish HPRF. The maximum PRF values in

PW Spectral Doppler Mode are shown.

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