GE LOGIQ 200 Quality Assurance Manual page 69

GE MEDICAL SYSTEMS
REV 1
2-13 Performance Variation Tests Probe #1 & #2 (cont'd)
2-13-2 Performance Scan
For Probe 1, adjust the system settings to produce the best possible overall image of the phantom.
This scan will be used to assess penetration capabilities, image uniformity, measurement
accuracy, axial resolution, lateral resolution and contrast detectability.
2-13-3 Penetration Capability
Refer to
Check one box to indicate the maximum penetration achieved for the probe under test.
If this is the first test using this procedure, check the 'No Change' box under system penetration.
If prior tests have been made on this probe using this procedure, compare the penetration test
results currently achieved against the previous penetration test results.
Indicate under system penetration if the is a 'Change' or 'No Change'.
2-13-4 Image Uniformity
The ACR requires that an evalution of several aspects the image be made.
1. Check overall image uniformity from near field to far field. 'Change' or 'No Change'.
2. Check average brightness at the edges of the scan compared to the middle. Check either
'Agree', 'Disagree, slight non-uniformity' or 'Disagree, major non-uniformity'.
3. Check that there are no vertical or radially oriented lines from array dropout. Check either
'Agree', 'Disagree, slight non-uniformity' or 'Disagree, major non-uniformity'.
4. Check that there are brightness transitions between focal zones. Check either 'Agree',
'Disagree, slight non-uniformity' or 'Disagree, major non-uniformity'.
2-13-5 Measurement Accuracy
Refer to
Use the calipers to measure from the vertical pin closest to the skin line to the pin furthermost
in depth.
Do the same with the horizontal row of pins.
Indicate if the system 'Passes' or 'Fails' the accuracy test.
If this is the first test using this procedure, check the 'No Change' box under system penetration.
If prior tests have been made on this probe using this procedure, compare the measurement
accuracy test results currently achieved against the previous measurement accuracy test
results.
Indicate if there is a 'Change' or 'No Change'.
ULTRASOUND QUALITY ASSURANCE REFERENCE MANUAL
Section 4-2, Step 4 for further details.
Section 4-2, Step 3 for further details.
2-5
2262684-100