Revision:1.0(2023-01-12)
144
4.5.2 Test Items
44..55..22..11 Transverse Resolution
• For the convex probe, keep the transverse resolution targets near the central line of
the scanning plane.
• For the linear probe with Steer function, do not turn on Steer when testing the
transverse resolution.
• Magnify the targets for observation if necessary.
• The distance between the left and right edges of a target point at a certain depth
indicates the transverse resolution at this depth also.
Test procedure:
1. Place the probe gently on the acoustic window of the phantom which is covered by water or
ultrasonic gel. Ensure that the transverse resolution targets are displayed in the center of the
image.
2. Focus to the transverse resolution targets.
3. Adjust the gain, dynamic range, TGC, and other parameters, so that only the target line is
displayed clearly on the image with no tissue image in the background.
4. Read the distance between two target points that can be distinguished clearly, while keeping
the transverse targets horizontal.
5. Repeat above steps at other depths.
The image effect is shown as follows:
44..55..22..22 Axial Resolution
Test procedure:
Diagnostic Ultrasound System
Service Manual
4 Function and Performance
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