Mindray DC-68, Service Manual

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5-12 Function and Performance Checking Method
3. Scanning techniques: contact the probe with the acoustic window of the phantom, no spacing
nor pressing.
Tips:
For the testing phantoms, please refer to Appendix B.
KS107BD is low frequency phantom and used when Probe focus frequency is less than 4MHZ;
KS107BG is high frequency phantom and used when Probe focus frequency is more than
5MHZ;
5.5.2.1 Resolution

transverse resolution
Test Step:
1. Cover the scan surface of the phantom with water or couple gel, gently contact the probe with
the scan surface, making the transverse resolution testing targets to be displayed around the
midline of the image.
2. Adjust the focus point focuses at the position where the transverse resolution testing targets
are displayed.
3. Adjust parameters like gain, dynamic range, TGC, making the background tissue unseen, just
displaying the target image clearly.
4. In condition that the transverse resolution testing targets are horizontally displayed, record the
minimal distance of two targets that can be clearly recognized.
5. Repeat the operation above for the transverse resolution testing targets at other depths.
As shown in figure below.

Axial resolution
Test Step:
1. Cover the scan surface of the phantom with water or couple gel, gently contact the probe with