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418 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1

Appendix C: Descriptions of control panel controls

SV/Gate

Push up to increase. Pull back to decrease.

In M-Mode: This control adjusts the size of the sample gate, measured in mm. The

control adjusts the distance of the vertical line between the two yellow calipers.

In the dual window view, the system displays the M-Mode sample gate image

data. Current data is on the right side, trailing data extends to the left.

In PW Doppler Mode: This control adjusts the distance in mm of the vertical line

between the two yellow calipers of the sample volume.

In the dual window view, the system displays the spectral data that the system

acquires along this line. Current data is on the right side, trailing data extends to

the left.

In Power Doppler Mode and Color Doppler Mode: Adjusts the size of the gate,

indexed in a range from 1-6.

 Set your gate to 1 for the best axial resolution. This is optimal for identifying

very small vessels.

 Set your gate to 6 for the best sensitivity. This is optimal for studying deep

vessels such as an abdominal aorta.

Active during: Color Doppler Mode and Power Doppler Mode image acquisition

sessions. In M-Mode and PW Doppler Mode, the control is active in the full-

screen B-Mode window after you select the Mode.

Sweep Speed

Adjusts the cine loop playback speed parameter so that you can stretch out or

compress the cine loop data in the review window. Push up to increase the speed

and compress the cine loop image. Pull down to decrease the speed and expand

the cine loop image.

When you are reviewing the cine loop you can also use the

Cine Loop Review

control to adjust the sweep speed.

In M-Mode: Set the sweep speed parameter in a range from 200 Hz to 4000 Hz in

increments of 100 Hz. The system displays the updated values in the status bar in

the lower left area of the screen.

In cardiac applications you might want to decrease the M-Mode sweep speed so

you can view more wall movements over more cardiac cycles in the window, or

increase the speed so you can view more wall detail over one cycle.

In PW Doppler Mode and PW Tissue Doppler Mode: Set the sweep speed

parameter in a range from 0.25 seconds at 4000 Hz to 5.1 seconds at 200 Hz. In

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VDO MG 2100 Dokumentacja Strona 418