5-52 Image Optimization
Type Parameter Description
Distance
Function: to set the distance the probe covered from one
end to the other end during a linear sweep.
Range: 10-200mm, in increments of 10mm.
Angle
Function: to set the angle the probe covered during a fan
sweep.
Range: 10-80°, in increments of 2°.
Reserve
Curve
To reserve the VOI edge line to be plane.
Parameter
package
/
Provides 5 parameter packages. The package name as
well as all the parameters can be preset. Parameter
packages of each mode are independent (vary with the
imaging mode).
5.11.4.3 Smart 3D Image Acquisition
The following takes the fetal face 3D imaging as an example.
1. Optimize the 2D image of the desired region.
Make sure:
High contrast between the desired region and the AF (amniotic fluid) surrounded.
Clear boundary of the desired region.
Low noise of the AF area.
2. Set ROI (Region of Interest) on the 2D image.
3. Roll the trackball to change the ROI size and position and VOI curve, press the <Set>
key to toggle between setting the ROI size or position.
To set the ROI /VOI, make sure:
Set ROI on the 2D image with the largest section area of the fetal face.
Set ROI a little larger than the fetal head.
Take scanning the fetal face sagittally as an example, the largest ROI is set on the 2D
image acquired from the sagittally section across the center of the face (with the
largest face section area), as shown in Figure a below. If not, a smaller face section
appears and results in a smaller ROI, as shown in Figure b below. (The left figure
below takes a 3D rendered fetal face to indicate the fetal under exam.)
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