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Vue PACS MR Perfusion User Guide Unrestricted Internal Use
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Vue PACS MR Perfusion User Guide - AE9362.docx
Diffusion
Setting Description
Default B-Value
Settings Default B-Value —Set the value that is to be used for calculating the eADC and
DWI map.
B-Value Filter Settings
Set the values that appear in the maps. By default, all values are included.
Clicking a value excludes it from the selection. Clicking it again re-includes the
value. At least two values must be selected.
Ischemia Settings
Setting Description
Lesion/Hypoperfusion
Morphology Parameters Set Lesion/Hypoperfusion morphology parameters.
•
Consolidate regions (distance) —Regions separated by a distance
smaller than the set value are merged.
•
Remove narrow regions —Regions narrower than the set value are
removed.
•
Remove small volume regions —Regions with a volume smaller than
the set value are discarded.
Use the slider to change the values. The changes are shown immediately on
the maps.
Morphology calculations are applied in the following order: consolidation of
regions, removal of narrow regions and removal of small volumes.
Lesion Threshold
Criteria Set Lesion threshold criteria.
Use the drop-down menus to define criteria for the maps.
Click Add to add the criterion to the criteria list.
A voxel is considered Lesion if it meets all criteria.
Note that acceptance criteria are applied as well when enabled.
Criteria types include:
•
Absolute —The criterion is applied to the actual value of the voxel.
•
Relative —The criterion is applied to the relative value of the damaged
side divided by the opposite side.
•
Difference —The criterion is applied to the value of the damaged side
minus the opposite side.
•
Relative to Average —The criterion is applied to the value divided by
the average of all voxel values in the map.