Cyberknife Treatment Deliver System equipped with the Xchange Robotic Collimator Changer; Linear Accelerator

In certain cases, a collimator may not fully dock, which triggers a system interlock and prevents motion from the operator console. If personnel then enter the treatment room and initiate motion using the in-room control pendant, the collimator may release and fall from the housing.

Accuray issued am Urgent Field Safety Notice to it consignees via hand delivered letter on 6/16/2026. The notice explained the issue, potential risk to health and provided the following safety instructions: "This condition may occur during collimator housing drop off or pick up while the collimator housing is positioned over the Xchange table. The system will interlock, stop motion, and display a message at the operator console to contact service. If an interlock occurs: (1) remove the patient from the treatment room before troubleshooting, (2) do not initiate treatment robot motion from the in-room control pendant, and (3) contact Accuray Service to safely release the collimator housing." Accuray is correcting the instruments. For questions, please contact Accuray Customer Support by phone or email, using the Service Request form available at http://www.accuray.com/service-requests.