User's Manual

Acclarix AX8 Diagnostic Ultrasound System User Manual Imaging
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Dynamic
Range
The Dynamic Range, or log compression, adjusts how echo intensities are
converted to brightness. A high dynamic range presents a flat image, while
a low dynamic range present a large range of intensities. Only available in
PDI/DPDI mode.
Frame rate
Adjusts the tradeoff between frame rate and spatial resolution. Higher
settings provide more temporal resolution.
Acoustic
power*
Adjusts the acoustic output power of the activated transducer. It is only
available in live imaging. Higher acoustic power numbers correspond to
more brightness and contrast in the image and more force of penetration,
but ALARA principle should be followed in actual situations.
Table 5-5 Color Mode Touch Screen Controls
5.4.2. Color Mode Variants
The Acclarix AX8 system supports 3 types of Color Doppler imaging:
 Color (Color Doppler): This is velocity Color Doppler that shows direction and velocity
of flow. Different colors represent different velocities, and positive flow has different
colors than negative flow.
 PDI (Power Doppler Imaging): PDI shows the power, or intensity, of the Doppler signal.
PDI is typically more sensitive to low levels of flow, but can not distinguish the velocity
or direction of the flow.
 DPDI (Directional Power Doppler Imaging): This is similar to DPI in that it shows the
power of the Doppler signal instead of the velocity. However, it does map positive flow to
different colors than negative flow.
5.5 M-mode
5.5.1. M-mode Touch Screen Controls
The following touch screen controls impact the M-mode image. Touch screen controls can be
located where you want them to be. See section 3.8 for details.
Name
Control
Description
Colorize
Switches between grayscale and colorized (pseudo-color)
postprocessing maps.
Gray Map
Tint
Adjusts the current postprocessing, either grayscale or tinted.