Chapter 8: Performance Testing 71
Lateral Measurement Accuracy
Penetration
Set up Lateral
Measurement
Accuracy
Perform steps 1 through 7 in Section .
Test Lateral
Measurement
Accuracy
1 Measure the distance, center to center, of any two pins that are 4-10 cm apart horizontally.
2 Verify that the distance measured is within the tolerance listed in Table 8.1.
3 Press the Freeze key to return the system to live 2D mode.
Table 8.1: System Measurement Accuracy
Measurements Tolerance
Axial Distance +/- 2%
Lateral Distance +/- 2%
Test
Penetration
1 Adjust the system controls to obtain a clear image that shows the limits of echo penetration
as shown in Table 8.2.
2 Measure from the center of the skinline to the deepest vertical position—where the scatter
echoes start to break up and tissue definition is lost.
Table 8.2: Imaging Performance
Imaging
Performance
C60e ICTe P17 L38e HFL38 TEE
2D Penetration 11.5 cm 5.0 cm 19.0 cm 6.0 cm 5.0 cm 18.0 cm
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