A built-in CT scanner takes images of your tumor before the start of each treatment session to make sure you are correctly positioned.
On-Board Imaging (OBI) makes it possible for your radiation therapy treatment team to take CT scans of your tumor right before the start of each treatment session, and make sure you are correctly positioned on the treatment table.
The imaging equipment is integrating directly into the treatment equipment. It is controlled by two robotic arms that rotate 360° around you to create a three-dimensional picture to confirm the location and configuration of the tumor.