Oncentra Brachy users using version 4.0 and above with Applicator Modeling license 170283-00

Under certain circumstances, there can be a difference between the planned and delivered dose of the two ovoid channels.

An Urgent Important Field Safety Notification letter (FAC-NU-0007) was issued to consignees to notify of the issue, clinical impact and recommend the following: 1) Recommended User Action in the unique scenario, which is only applicable for the Venezia" applicator: Avoid use of the combination of the two Venezia" applicator Anchor Points O1-Center and O2-Center by disabling one of them in the Applicator Library Manager. 2)Recommended User Action in the exceptional situation that may also occur for other Applicator Models: Avoid incorrect placement of the Anchor Points, especially exchanging left / right anchor point positions. 3) Recommended User Actions for both scenarios: Until an updated version of Oncentra Brachy is available, it is strongly advised: " To use additional Anchor Points during applicator modelling. This will further reduce the chance of mirroring the Applicator Model. " To cross-check the source dwell position information from the Case Explorer to be in accordance with the source dwell positions in the image views. " Use the Triangles option for the applicator skin visualization in the 3D view, and review whether the Applicator Model has a correct shading display. " Perform proper Quality Assurance for all treatment plans before treatment delivery. Consignees are required to acknowledge receipt of the notification to Elekta within 30 days.