EDAN Acclarix AX4 User Manual page 50

Acclarix AX4 Diagnostic Ultrasound System User Manual
Baseline
Invert
Wall Filter
Map
Persist
Smooth Filter
Threshold
Frequency
Steer
The Baseline control adjusts the Color baseline. Upward
presses move the baseline up on the scale and downward
presses move the baseline down. Baseline is not available in
PDI mode.
Normally, signals above the baseline are positive velocities
(moving toward the transducer). However, when Invert is
pressed then negative velocities are above the baseline. Invert
does not affect the baseline position. Invert is not available in
PDI mode.
The Filter control removes excessive noise from movement of
vessel walls. Options of Low, Med. and High are available.
Adjusts the current map for the active color variation.
Persistence determines the number of frames that are
averaged together for display. Levels of Off, Low, Med. and
High are available.
The smoothness filter determines the spatial filtering that is
applied to the Color image. Higher filter levels create a
smoother image. Upward presses increase the filter. Downward
presses decrease the filter.
When the system receives both B-mode and color signals from
a region within the Color ROI box, the Threshold determines
whether to display overlapping signals as grayscale or color.
In Color mode, higher Threshold values display more color, and
lower Threshold values display more grayscale.
In TDI mode, higher Threshold values display more grayscale,
and lower Threshold values display more color.
Upward presses increase threshold. Downward presses
decrease threshold.
Frequency determines the transmit frequency used by color
Doppler. Upward presses increase the frequency. Downward
presses decrease the frequency.
This control is only available for linear transducers. It steers the
Color ROI box angle left or right.
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Imaging