GE LOGIQ 200 Quality Assurance Manual page 85

GE MEDICAL SYSTEMS
REV 1
4-2 Probe Q/A – System Performance Test (cont'd)
7. Grayscale / Contrast Resolution – Record an Image that displays the best view of the Phantom
Grayscale Targets.
TERMS: Depending on your phantom, there may be grayscale targets of varying density. Ideally these
are provided to quantify the dynamic range of the instrument as it is spread over the grayscale
boundaries of the scan converter. Over time, variances in system performance, or poor imaging can
be quickly noted.
ACQUISITION: Adjust the Depth, Master Gain, TGC and Transmit Power to produce the best shot
of ALL the Grayscale Targets in one view. Freeze the view that best demonstrates the separation
between the grayscale targets. The point is not how any ONE of them looks but how well defined they
are from each other, and from the background material. Take a hard copy of this view
ULTRASOUND QUALITY ASSURANCE REFERENCE MANUAL
Illustration 4-3 Phantom Grayscale Targets
4-5
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