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4D tools
4D Feature
What it does
4D Gain
Affects the transparency of the volume
rendering.
4D Clarity
Edge preserving speckle and noise reduction
filter that reduces speckle while preserving or
even enhancing significant boundaries in the
volume data.
Angle
Sets the cut-planes and crop planes to pre-
defined positions.
Auto
Automatically optimizes the brightness of the 4D
image.
Clear
Sets the cut-planes and crop planes to the
default position.
DDP
Performs temporal processing which reduces
random noise without affecting the motion of
significant tissue structures.
Frame rate
Adjusts the frames per second of the system –
adjusting means a trade of between spatial and
temporal resolution.
Gamma
Adjusts the brightness of midtone values.
HD live
Simulates light propagation and scattering
through tissue
Low velocity
Removes low velocity blood flow and tissue
reject (in 4D
movement that reduces image quality.
Colour mode)
Shading
Adjusts the shading effect on the volume
rendering
Smoothness
Affects continuity of structures and image noise
in the volume rendering.
Translate
Translates the crop plane into the volume.
Colour
Adjusts the display transparency of color data.
Transparency
(4D colour)
Tissue
Adjusts the display transparency of tissue data.
Transparency
(4D, 4D colour)
20
When to use and how
Too much 4D Gain applied will take away
structures, too little will leave opaque "Gray
clouds" in the ventricle
Increasing 4D Clarity will create images with
less visible speckle noise and with a softer
appearance.
Use to display different rendering views –
can be used in 2d mode to angle through
different views without rotating the probe
Use for quick optimization of image
brightness – further manual adjustments
may be required to suit individual
preferences.
Use to return to zero
Reduce if there is too much smoothness in
the image.
Use to avoid multibeat to get FR >13 for
LVQ – trade off with image resolution.
A higher gamma value produces an overall
darker image, a lower gamma value a
brighter image.
Use for rendered images with realistic
looking soft shadows.
Turn on during 4d colour acquisition to
improve
Use to improve three dimensional
perception.
Too much smoothness will blur the image,
too little will leave too much noise.
Adjust to move closer to structure of
interest and improve appearance of 4D
image.
An increase of Color Transparency may help
bring out relevant color flow information
(e.g. jet).
An increase of Tissue Transparency may
help bring out tissue structures or flow
information behind obscuring tissue
structures.
Frequency
of
adjustment
As Necessary
AN
AN
AN
AN
Rarely (once
set to
desired level)
AN with
caution
AN
AN user
preference
Rarely (leave
set to on)
Rarely
Rarely once
set
Frequently
AN
AN
JB83797AU
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