ARTISTE, ONCOR Avantgarde, ONCOR Impression Plus, ONCOR Expression, PRIMUS, PRIMUS Plus, Syngo RT Therapist; therapeutic treatment of cancer || Product Usage: || The intended use of the SIEMENS branded ARTISTE and ONCOR family of linear accelerator systems is to deliver X-Ray photon and electron radiation for the therapeutic treatment of cancer. PRIMUSTM family of linear accelerator systems is to deliver x-ray radiation for therapeutic treatment of cancer. Syngo RT Therapist is a software application whose indication for use includes the viewing, processing, filming, and archiving of medical images. It also permits patient data management, patient selection/setup, patient positioning verification, treatment planning, treatment delivery/verification, and treatment recording.