VDO MG 2100 Specifiche Pagina 311

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Rev 1.1 VisualSonics Vevo 2100 Imaging System Operator Manual 311
Chapter 43: Acquiring Color Doppler Mode images
Color
Activates Color Doppler Mode acquisition and begins displaying the color box overlay
over the B-Mode background image.
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.
Active during: PW Doppler Mode, PW Tissue Doppler Mode, Color Doppler Mode,
Power Doppler Mode image acquisition sessions.
Velocity
Adjusts the PRF (pulse repetition frequency). The higher you set the PRF, the lower the
signal resolution.
SV/Gate
Push up to increase. Pull back to decrease.
In Color Doppler Mode: Adjusts the size of the multiple sample volumes that span the
depth of the region of interest, indexed in a range from 1-6.
Set your gate to 1 for the best axial resolution.
Set your gate to 6 for the best sensitivity.
Wall Filter
Filters out signals that correspond to low velocity axial motion. Typically these include
vessel wall movement, cardiac wall movement and tissue movement caused by
respiration. Push up to filter out more. Pull down to filter out less. In Color Doppler
Mode and Power Doppler Mode: Set as low as you can so that you don't lose any flow,
but higher than any motion that creates low frequency artifacting.
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