Penetration; Additional Performance Tests; Color Doppler (Color) - FujiFilm SonoSite EDGE II Service Manual

Penetration

The penetration measurement is an integral part of the quality assurance program. Penetration is defined
as the deepest depth at which an ultrasound system can provide adequate image quality of small
anatomical structures.
Penetration measurements should be performed and the results retained for comparison to future
measurements. Penetration measurements should remain fairly consistent over time assuming use of the
same system settings and scanhead. Degradation of the penetration measurement in excess of 1cm may
indicate a transducer or system electronics issue.
Loss of measured penetration may also be caused by degradation (dessication) of the ultrasound phantom.
Ultrasound phantoms used for penetration measurements must also be part of a quality assurance program
to maintain their integrity. Follow all of the phantom manufacturer recommendations for use, storage, and
maintenance of the phantom.
Test 1
Penetration
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Additional Performance Tests

Color Doppler (Color)

Test Color 1
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66 Chapter 8: Performance Testing
Use the same scanhead and system settings as previous measurements if possible.
Adjust the system controls to obtain a clear image that shows the limits of echo
penetration.
Tap the Freeze button and then save the image.
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.
Record and retain the results for future reference. Scanhead type and system settings
(exam type, depth, resolution mode, etc.) should also be recorded to ensure proper
comparison with future tests.
Tap the Freeze button again to return to live imaging.
Connect any transducer.
Tap the Color button. "Color" should be annotated in the top left corner of the display.
A Region of Interest (ROI) box is displayed on top of the grayscale image. Use the
touchpad to move the Color ROI. Verify that the ROI moves to the new position on the
display.
Adjust the Depth control for minimum depth in the image.
Adjust the Gain control so that color speckles just appear inside the ROI box.
Gently tap the face of the transducer and observe that the ROI box fills with color
information.
Tap the Freeze button and then save the image. Tap the Freeze button again to return
to live imaging.