Mindray DC-80A, Operator'S Manual

Page: 118 / 391

5-38 Image Optimization
(3) Amniotic fluid (AF) isolation
The desired region is adequately isolated by amniotic fluid.
The region to be imaged is not obscured by limbs or umbilical cord.
(4) The fetus keeps still. If there is fetal movement, it is necessary to rescan.

Angle of a B tangent plane
The optimum tangent plane to the fetal face 3D/4D imaging is the sagittal section of the face. To
ensure high image quality, scan the maximum face area and maintain edge continuity.

Image quality in B mode (2D image quality)
Before entering 3D/4D capture, optimize the B mode image to ensure:

High contrast between the desired region and the surrounding AF.

Clear boundary of the desired region.

Low noise of the AF area.

Scanning technique (only for Smart 3D)

Stability: the body, arm and wrist must move smoothly, otherwise the restructured 3D image
distorts.

Slowness: move or rotate the probe slowly.

Evenness: move or rotate the probe at a steady speed or rate.
NOTE:
1. A region with a qualified image in B mode may not be optimal for 3D/4D imaging. E.g.,
adequate AF isolation for one MPR does not mean the whole desired region is isolated
by AF.
2. Practice is needed for a high success rate of qualified 3D/4D imaging.
3. Even with good fetal condition, acquiring a suitable 3D/4D image may require more than
one scanning.
5.10.3 Static 3D
Static 3D provides single frame image acquisition of 3D images. During scanning, the probe performs
the scanning automatically.
5.10.3.1 Basic Procedures for Static 3D Imaging
To perform Static 3D imaging:
1. Select the appropriate probe and exam mode. Make sure there is sufficient gel on the probe for
scanning.
2. Obtain a 2D image.
Make sure there is:

High contrast between the desired region and the surrounding AF (amniotic fluid).

Clear boundary of the desired region.

Low noise of the AF area.
3. Press to enter Static 3D acquisition preparation mode, and define the ROI as well as the
curved VOI.
To adjust the ROI:

Under acquisition preparation status: roll the trackball to change the ROI size, ROI position and
curved VOI, press the <Set> key to toggle between setting the ROI position, ROI size and
curved VOI.

Tap [Flip VOI] to flip VOI. Tap [Reset VOI] to reset the angle of VOI to the original status.

Enter touch screen mapping mode, see “3.8.4 Touch Screen Operation” for details.