Mindray Imagyn 7, Operator'S Manual

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7 - 6 Operator’s Manual
7 3D/4D
• Amniotic fluid (AF) isolation
–
The region desired is isolated by amniotic fluid adequately.
– The region for imaging is not covered by limbs or umbilical cord.
• The fetus keeps still. If there is a fetal movement, you need a rescan when the fetus is still.
Angle of a B tangent plane
The optimum tangent plane to the fetal face 3D imaging is the sagittal section of the face. To
ensure high image quality, you’d better scan maximum face area and keep edge continuity.
Image quality in B mode (2D image quality)
Before entering 3D capture, optimize the B mode image to ensure:
•
High contrast between the desired region and the amniotic fluid surrounded.
• Clear boundary of the desired region.
• Low noise of the amniotic fluid area.
Scanning technique (only for Smart 3D)
• Stability: body, arm and wrist must move smoothly, otherwise, the restructured 3D image
distorts.
• Slowness: Move or rotate the transducer slowly. The speed of linear scan is about 2 cm/s and
the rotation rate of the fan scan is about 10°/s ~ 15°/s.
• Evenness: move or rotate the transducer at a steady speed or rate.
• Method
Capture images using Linear scan or Rocked scan.
–
Linear scanning
Move the probe across the surface.
– Rocked scanning
Rotate the probe once from the left to the right side (or from the right to the left) to include
the entire desired region.
• Scanning plane and probe movement