FujiFilm Sonosite PX System, Руководство по обслуживанию

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Chapter 8: Performance Testing 77
Axial Measurement Accuracy
Note: Measurements must be performed while the image is frozen.
Lateral Measurement Accuracy
Set Up Axial
Measurement
Accuracy 1 Acquire the image.
2 Press the Freeze button.
3 Press the Caliper button. The caliper appears on the image display. (See the Sonosite
PX Ultrasound System User Guide , if necessary, for caliper operation.)
4 Use the touchpad to position one of the calipers.
5 Press the Select button to fix the caliper and enable the other caliper.
6 Use the touchpad to move the other caliper. The results update as you move the
caliper, and the measurement is complete when you finish moving the calipers. (Press
the
Select button to alternate the active caliper, and adjust the measurement with the
touchpad.)
Test Axial
Measurement
Accuracy 1 Measure the distance, center to center, of any two pins that are 5-12 cm apart
vertically.
2 Verify that the distance measured is within the tolerance listed in Table 8.1 .
Set Up Lateral
Measurement
Accuracy Perform “Set Up Axial Measurement Accuracy” on page 77 .
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 button to return the system to live 2D mode.
Table 8.1: System Measurement Accuracy
Measurements Tolerance
Axial Distance +/- 2%
Lateral Distance +/- 2%