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Section 5.4 PACS image tests
The loss of dynamic range is most common in the top dark band. If reduced dynamic range
occurs, the five squares will not be visible in the top dark band (band #1).
3.
Record the results in
5.4.4 PACS image comparison results
Use the values in
to quantitatively compare images. For example, to determine if a PACS
supports GE VOI-LUTs, compare PACS test images #1 and #6. If the number of distinct bands and
visible squares are equal, then the PACS correctly supports VOI-LUTs.
Table 5-4 PACS image comparison results
Tests
Results
DICOM header on PACS (image #1 No-Burn)
WC = __________
WW = __________
VOI-LUT (Yes/No)
DICOM header on PACS (image #6 Burn-on-Send)
WC = __________
WW = __________
VOI-LUT (Yes/No)
Values displayed on PACS viewer (image #1)
WC = __________
WW = __________
Values displayed on PACS viewer (image #6)
WC = __________
WW = __________
Saturation visible in lung or abdomen region
Able to see all five squares in top band of image #6
Able to see all five squares in top band of image #1
Images #1, 4, 5 appear visually identical
Images #6, 7, 8 appear visually identical
PACS able to select Normal/Harder/Softer
DICOM header on PACS (image #9 CR-Fallback).
VOI-LUT not present;
correct WW/WC