Pw-Mode; Pw Touch Screen Controls - EDAN Acclarix AX4 User Manual

Acclarix AX4 Diagnostic Ultrasound System User Manual

5.2 PW-mode

5.2.1. PW Touch Screen Controls

The following touchscreen controls impact the PW image. The location of the touchscreen
controls can be customized (see section 3.8 for details).
Name Control
Scale
Baseline
Invert
Angle
Correct
Quick-Angle
Filter
Colorize
Gray Map
Tint
Dynamic
Range
Description
Scale adjusts the range of velocities that are displayed. Upward
presses increase scale and downward presses decrease scale.
Increasing scale when the PW cursor is relatively deep may
result in invoking HPRF, if it is configured. See section 5.2.2 for
details.
The Baseline control adjusts the Doppler baseline. Upward
presses move the baseline up on the screen and downward
presses move the baseline down.
Normally, signals above the baseline are positive velocities
(moving toward the transducers). However, when Invert is
pressed, the negative velocities are displayed above the
baseline. Invert does not affect the baseline position.
Adjust the Doppler scale to account for the angle between the
Doppler cursor and the blood flow. Upward presses increment the
angle. Downward presses decrement the angle. Angles above 80
are not allowed.
Adjusts the angle correct quickly to one of 60/0/-60.
The Filter control removes excessive noise from movement of
vessel walls. Options of Low, Med. and High are available.
Switches between grayscale and colorized (pseudo-color)
postprocessing maps.
Adjusts the current postprocessing, either grayscale or tinted.
The Dynamic Range, or log compression, adjusts how signal
intensities are converted to brightness. A high dynamic range will
display more shades of gray, while a low dynamic range will
display fewer shades of gray and a more contrasty Doppler
display.
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Imaging