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syngo Volume Evaluation
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3.1. Planning a Volume with Automatic Volume Detec-
tion
The automatic method is best used to evaluate a struc-
ture which has a different contrast (HU) than the sur-
rounding tissue, such as the lung. You plan the volume
with just a few clicks.
Automatic Volume Detection uses the 3D region grow-
ing method. You enter thresholds that are to be consid-
ered for region growing and set seed points.
Volume Evaluation searches for directly connected
voxels within the threshold limits, and assigns them to
the VOI.
The system then generates a volume considering all
voxels that are found with region growing and which
CT value lies within the Evaluation Limits.
• Check and adapt the Thresholds, if necessary.
• Set a seed point.
• To enlarge the volume, set additional seed points.
• To only include a specific range of HU values into the
volume, change the Evaluation Limits. By default,
the Evaluation Limits are identical to the Threshold.
• To start the evaluation, click the Start Evaluation but-
ton. The evaluation results are displayed in segment
4. The volume is colored on all images in all views.
• You can define a new volume.
You can correct the Evaluation Limits and restart the
evaluation. If the result is not satisfactory, you can
delete the volume.
C2-025.630.01.01.02_APPLICATIONGUIDE_SPIRIT.book Page 293 Friday, April 8, 2005 9:55 AM