Acclarix AX4 Diagnostic Ultrasound System User Manual
Imaging
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Persistence
Persistence averages frames together to reduce random noise.
There are 4 options: Off, Low, Med., and High. The persistence
level corresponds to the number of frames averaged. The frame
rate is unchanged; as each new frame is acquired, it is averaged
with the preceding frames.
Frequency
Frequency allows selection of the fundamental or harmonic)
frequencies used for imaging. The Harmonic option must be
invoked to access the harmonic frequencies. Frequency selection
is available during live imaging.
Harmonic
The Harmonic control invokes and exits harmonic imaging. While
in harmonic imaging the control is highlighted and an
‘H’ is
displayed in the B-mode frequency field. Depending on the
transducer, there may be multiple harmonic frequencies.
Spatial
Compounding
Spatial Compounding combines images fired from multiple angles
to reduce speckle, reduce shadow artifacts, and enhance contrast.
Spatial compounding is an on/off control.
Focus Number
Focus Number adjusts the number of foci is displayed. As the
number of foci increases, image uniformity across depth will
increase, but the frame rate will decrease.
Focus Position
Focus Position adjusts the depth of the focus or foci. Upward
presses move the focus shallower, regardless of the U/D invert
status of the image.
Gray Map
Gray Map adjusts the postprocessing map used on the B-mode
image. In general, higher map numbers correspond to more
contrast in the image.
Colorize
The Colorize control adds a color tint to the B-mode image.
Tint
The Tint control changes the color tint being used. There are 20 tint
maps available. If Colorize had been off, changing the Color map
control will automatically activate it.
Left/Right
The Left/Right invert control is indicated by a backward R and is
used to toggle the left/right orientation of the image. The Edan E
orientation marker at the top of the image switches with the
left/right invert to match the orientation marker on the transducer.
Up/Down
The Up/Down invert control is indicated by an upside-down R and
is used to toggle the up/down orientation of the image. The TGC
curve is also re-oriented with Invert On, so that the top of the TGC
curve corresponds to the top of the image on the screen.
