SAEVO EVUS 8, Руководство пользователя

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6 Acquiring Images
68 Basic User Manual
To set the display format:
1. Select the
Menu
key in the real time scan. A menu pops up on the screen.
2. Select Dis Format by using the trackball or the ↑ or ↓ key.
3. Rotate the Menu key or select the ← or → key to adjust the setting.
■ Power
Power is used to select the amount of ultrasound acoustic power produced by the probe. The adjustment range of
the power is 1-100%, and ±10% can be adjusted each time. The real time value of the power is displayed in the
imaging information area on the basic screen.
To adjust the power:
1. Select
Power% by pressing the corresponding function key.
2. Rotate it to adjust the value.
NOTE:
Expose the patient to the lowest practical transmit power level for the shortest possible time to achieve a
satisfactory diagnosis.
■ Video Invert
Video invert is used to invert the M trace display related to brightness.
To enable or disable the video invert:
1. Select
Video Invert by pressing the corresponding function key.
2. Rotate it to enable or disable the feature.
6�5 Acquiring Spectral Doppler Images
Spectral Doppler imaging is intended to provide measurement data concerning the velocity, the direction, and the
category of the arterial or vein flow. It contributes a more accurate qualitative analysis than the color flow imaging.
Spectral Doppler includes Pulsed Wave Doppler (PW) mode and Continuous Wave Doppler (CW) mode.
6�5�1 PW Mode
Pulsed Wave Doppler (PW) is a Doppler mode that measures velocity in a PW sample volume and displays
that information in a spectral trace with audio output. PW includes conventional PW and High Pulse Repetition
Frequency (HPRF). PW Doppler can be combined with the B mode for rapidly selecting the anatomical site for PW
Doppler examination. The site where PW Doppler data is derived appears graphically on the B-Mode image.
Perform the following steps to acquire PW-mode images.
1. Optimize a B-mode image.
2. Select the
PW
key on the control panel to enter the inactivated B+PW mode 1.