6 - 10 Operator’s Manual
6 Image Acquisition
6.7.2 PW/CW Mode Image Parameter
Gain
This function is intended to adjust the gain of spectrum map. The real-time gain value is displayed
in the image parameter area.
SV
To adjust the SV position and size of sampling in PW mode, the real-time value of SV and SVD are
displayed in the image parameter area in the top-left corner of the screen.
CW Focus Position
To adjust the CW mode SVD. The real-time focus position value is displayed in the image
parameter area in the top-left corner of the screen.
Image Quality
Refers to the transmitting frequency in Doppler mode of the probe, the real-time value of which is
displayed in the image parameter area.
Scale
This function is used to adjust the speed range of color flow, which is adjusted through PRF in the
system. The real-time PRF value is displayed in the image parameter area.
To provide a much clearer color flow image.
Use low PRF to observe low-velocity flows, and use high PRF to observe high-velocity flows.
iTouch
To optimize image parameters as per the current tissue characteristics for a better image effect.
Auto Calculation
This function is used to trace the spectrum and calculate the PW mode image parameters. The
results are displayed in the results window.
In real-time scanning, the results displayed are derived from the calculation of the latest cardiac
cycle.
In the freeze and cine status, the results displayed are calculated from the current selected area.
• Auto Calculation Parameter: To set the calculation results to display.
• Auto Calculation Cycle: To set the heart cycle number for auto-calculation.
• Trace Area: To set the trace area of the Doppler wave in the spectrum map, applicable for auto
calculation, V Max and V Mean display.
• Trace Smooth: To set the smooth level when tracing.
• Trace Sensitivity: This function is used to set the sensitivity of tracing in the spectrum.
Speed
This function is used to set the scan speed of PW mode imaging.
T/F Res
Adjusts for a balance between time resolution and spatial resolution.
WF (Wall Filter)
To display the image accurately, it adjusts the cut-off used in the wall filter, and filters out the flow
noise which is produced by vessel wall vibration. The real-time value is displayed in the image
parameter area.
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