How to Treat Multiple Objects
Currently, Spine SRS can only calculate a treatment plan for a single PTV as one connected volume. To treat multiple metastases, either treat them separately or treat them together as one connected object volume as described in the following steps.
Generate a GTV and CTV for each metastasis in SmartBrush.
Go to Object Manipulation.
Use the Union operation to connect the isolated CTV objects.
Combine the volumes into a single target volume (e.g., using SmartBrush or SmartShaper).