This is the GE Healthcare Discovery RF Gen 2 system displayed at the American Society for Radiotherapy and Oncology (ASTRO) 2018 annual meeting. It is a dedicated computed tomography (CT) scanner for radiation oncology. The vendor introduced several updates for this year for the system in 2018, including a new version of smart metal artifact reduction, 32-slice CT, whole lung thin slice 4-D imaging to see respiratory motion and interactive 4-D imaging.