Incorrect Information Delivery Leads to Device Safety Notice

Varian Medical Systems has issued a field safety notice concerning its 4D Integrated Treatment Console v 8.6 or 8.8. In certain configurations, the 4DITC can interpret a RapidArcTM or VMAT treatment field incorrectly. If it happens, the field will be delivered with a constant dose rate and gantry speed for the entire duration of the delivery, which can lead to the delivered dose being different from the planned dose.