SonoSite C1.9 PLUS, Руководство по обслуживанию

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66 C1.9 PLUS Ultrasound System Service Manual
8.3 Setting Up Performance Tests
To set up the performance tests:
1.
Attach the C-60/5-2 MHz transducer to the system.
2. Select general for optimization and OB for exam type.
3.
Couple the transducer to the phantom, adjusting gain settings and transducer for
a proper phantom image (e.g., pins are high-level echoes positioned in straight
lines; cysts are sonolucent, edges are sharp, and graphite particles of the
phantom are mid-grays).
8.3.1 Scan Reference Orientation
1. Verify that the correct transducer name appears in the upper right corner of the
system display.
2. Verify that the scan plane orientation mark in the image located near the skinline
corresponds to element #1 on the transducer. To test, put your finger on the
probe and run it across the transducer face. Your finger touching the transducer
face should appear at the orientation mark on the display image format.
3. With the array pointing down and the orientation mark to the operator’s left,
element #1 corresponds with the left side of the array.
8.4 Testing 2D Performance
To test 2D performance:
1. Use a C60/5-2 MHz transducer in 2D mode.
2.
Adjust the position of the C60/5-2 MHz transducer on the phantom.
3. Use the 2D system controls to obtain a clear image that shows both the
horizontal and vertical rows of pins.
8.4.1 2D Image Quality
To test 2D image quality:
1. Verify that the ultrasound image appears uniform in both the axial and lateral
direction, with no dropouts or intensity variations.
2. Verify that the cystic structure at the focal zone is clearly differentiated from the
surrounding tissue and is echo-free, while solid tissue, with numerous echo
sources, appears solid.