Operating instructions

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syngo Vessel View
Measurement Analysis
Flags
Flags are special area measurements. There are usually
two or three flags associated with each path, but they
can also be turned off completely. You can move them
in the Vessel Navigator to healthy (one or two flags,
called Normal A and Normal B) and stenotic (the flag
called Minimum) parts of the vessel.
When their contours (on the Vessel Orthogonal MPR)
are accepted their values are displayed in the Mea-
surement List. Accepted area measurements and flags
are shown as (planar) contours in the Volume Seg-
ment.
They have the same color as their MPR counterpart.
Stenosis Ratio Values
Each path has a variable number of Stenotic Ratio val-
ues displaying the ratio of the Minimum flag to the
average of the Normal A flag and the Normal B flag (if
available).
Which parts of the flags are used for this ratio – area,
minimum diameter, maximum diameter and/or equiv-
alent diameter, is determined globally in the configura-
tion dialog.
The value that is displayed is actually 100% minus the
ratio (following the NASCET criteria), resulting in a per-
fectly healthy vessel being assigned a 0% stenosis and
a totally obstructed vessel being assigned a 100%
stenosis.