Medical device manufacturer, Varian, has issued an urgent medical device correction concerning TrueBeam and TrueBeam STx.
It has been identified with the TrueBeam and TrueBeam STx systems where, under certain tuning conditions, the electron beam emerging from the bend magnet may have an elongated spot shape. The presence of this elongated beam spot shape can be detected by a larger than expected difference in the penumbra between the radial and transverse planes, as measured by beam profile scans.
Varian is notifying all possibly affected customers with the notice and developing a correction for this issue. According to the local supplier, the affected device has been distributed in Hong Kong.
If you are in possession of the affected products, please contact supplier for necessary actions.