8 Elastography
Operator’s Manual 8 - 5
Tap [HQElasto] to enable the function and the button will be highlighted.
When the feature is activated, the system turns into single-frame scanning mode. Pressing
<Update> acquires one frame image of B and Elasto.
RLB Map
Used to help the user judge the region where it is suitable for elasto measurements based on the
distinctive colors in elasto image in quality map.
The RLB Index shows the signal reliability of the STE inside the ROI, and it helps the user judge
the effectiveness of the current elasto measurement.
Tap [RLB Map] to select the display mode of the RLB map, B-mode image and elasto image.
• The higher the RLB Index is, the more reliability the signal becomes; vice versa.
• There are three colors showing the RLB Index: Red (low reliability), Yellow (medium
reliability) and White (high reliability).
• The color in High area is suitable for the imaging of shear wave elastography.
• The color in Low area is not suitable for the imaging of shear wave elastography (liquid, gas,
bone, etc). It can be used as a tool to detect the tissue or the lesion.
RLB View
This feature supports the less qualified region or the region that fails to receive shear waves of the
gas or liquid to be displayed in hollow.
Tap [RLB View] on the touch screen to enable the function and the button will be highlighted.
After the RLB View function is enabled, the less qualified region is displayed in hollow. The
hollow region can be seen in B images. The hollow region corresponds to the purple region in the
reliability image.
M-STB Index/Sensi.
The STE imaging can easily be affected by respiration, pulse of the main artery, or transducer
movement, which may cause uncertainty and unreliability. The M-STB Index helps users judge
whether the current elasto image is captured in stable state. Based on the judgment, capturing
method, capturing part, and patient cooperation can be adjusted accordingly.
Tap [M-STB Index] on the touch screen to enable the function and the button will be highlighted.
Then the M-STB Index is displayed at the upper side of the image.
• Grading definition of the M-STB Index: 1 star indicates that the motion interference is
extremely strong, and it is not recommended to use the elasto image; 2 stars indicates that the
motion interference is relatively strong, and it is not recommended to use the elasto image; 3
stars indicates that the motion interference is general, and it is not recommended to use the
elasto image; 4 stars indicates that the motion interference is not strong, and the image can be
used; 5 stars indicates that the motion interference is few or slight, and it is recommended to
use the elasto image.
• Users can determine the interference degree of the currently-captured elasto image according
to the M-STB Index.
Tap [M-STB Sensi.] on the touch screen to set the grading threshold of the M-STB Index.
The stronger the sensibility of the motion stability is, the higher the judgment accuracy of the
motion interference becomes.
Smooth
This feature is used to reject the noise and smooth the image.
Tap [Smooth] on the touch screen to adjust the parameter.
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