Note Before Use - Mindray DC-40 Operator's Manual

Section B: it is the horizontal section in fetal face up posture, as shown in the
figure B above.
Section C: it is the coronal section in fetal face up posture, as shown in the figure
C above.
Tips: the upper part of the 3D image in the D window is corresponding to the
orientation mark on the probe, if the fetal posture is head down (orientating the
mother's feet), and the orientation mark is orientating the mother's head, then the
fetus posture is head down in the 3D image, you can make the fetus head up by
rotating the 3D image by clicking [Quick Rot.] to be "180°" in the soft menu.
Wire cage
When you view a 3D/4D image on the display monitor, it's sometimes difficult to
recognize the orientation. To help, the system displays a three-dimensional drawing
to illustrate the orientation. Of which, the blue plane presents the image acquisition
where started, while the red plane presents the image acquisition where ended,
besides, a yellow plane in the wire cage presents the position of the sectional plane.
See the graphic below:
CAUTION:

5.10.2 Note Before Use

5.10.2.1 3D/4D Image Quality Conditions
In accordance with the ALARA (As Low As Reasonably Achievable) principle,
NOTE:
try to shorten the sweeping time after a good 3D image is obtained.
The quality of images rendered in 3D/4D mode is closely related to the fetal condition,
angle of a B tangent plane and scanning technique (only for Smart 3D). The following
description uses fetal face imaging as an example. Imaging of other parts is the same.
Fetal Condition
(1) Gestational age
Fetuses of 24~30 weeks old are the most suitable for 3D imaging.
(2) Fetal body posture
Recommended: cephalic face up (Figure a) or face to the side (Figure b);
NOT recommended: cephalic face down (Figure c).
5-40 Image Optimization
Wire Cage
The ultrasound images are provided for reference only, not
for confirming a diagnosis. Please use caution to avoid
misdiagnosis.