We are using GateCT for our lung and abdomen cases, both SBRT and non SBRT. Our physicians love to see the motion during CT to draw their ITVs. We have found our images to be a more accurate representation of motion after moving from RPM to GateCT.
We use Align RT for DIBH treatments, however have not found much benefit behind using GateCT for simulation of these patients.
Please feel free email me at firstname.lastname@example.org for further discuss or questions.