VDO MG 2100 Dokumentacja Pobierz pdf (Strona 409)

Rev 1.1 VisualSonics Vevo 2100 Imaging System Operator Manual 409

Appendix C: Descriptions of control panel controls

from the face of the transducer at which the system begins to display the

ultrasound image.

To use this rocker switch control:

 Pull down to remove a 1mm strip of image data from the top. For example, if

your transducer is set to acquire data from 2mm to 12mm, when you pull the

control down once, the display will only show the data between 3mm and

12mm. The minimum depth varies by transducer.

 Push up to add a 1mm strip of image data to the top.

Display Map

Cycles you through a predefined set of optimization maps that you can apply

either while you are acquiring or reviewing image data.

Push up or pull down to cycle through the available maps for the active imaging

mode.

Doppler Angle

Adjusts the angle correction in 5-degree increments between the vertical line of

the ultrasound pulse from the face of the transducer and the direction of vascular

flow in the sample volume in a PW Doppler Mode image acquisition session. The

dashed yellow line indicates the direction of flow.

When the system receives the return signal, it applies an algorithm to the signal

data to correct for the delta. This produces usable PW Doppler Mode data.

To use this dial control:

1. Turn the dial to align the dashed yellow line with the direction of the vascular

flow in your sample volume region.

The system always displays the value of the resulting angle as a positive value

between 0 degrees and 80 degrees, regardless of which side of the vertical line

you align the dashed line.

For angles between 60 degrees and 80 degrees, the system applies the color

blue to the dashed line. This indicates that the angle is too great to correct.

2. Reposition your transducer and/or the animal to bring the angle of the vessel

as parallel as you can to the vertical yellow line that represents the transducer

beam.

Doppler Gain

Adjusts the frequency shift in increments of 1.0 dB. Turn clockwise to add gain

and brighten the Doppler data. Turn counterclockwise to reduce gain and darken

the data.

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VDO MG 2100 Dokumentacja Strona 409