Radiation Therapy Treatment Planning System Product Usage: RayStation is a software system designed for treatment planning and analysis of radiation therapy. The treatment plans provide treatment unit set-up parameters and estimates of dose distributions expected during the proposed treatment, and may be used to administer treatments after review and approval by the intended user.

An error may occur with the display of dose computed on images other than the planning CT (auxiliary CT) when using multiple patient cases in RayStation 5. If a CT image set with the same Frame of Reference as the displayed auxiliary CT set exists in another case, the dose display may be incorrect. When the error occurs, the display of dose in patient views, including the maximum dose position, the dynamic isodose lines and the dose grid may be incorrect. The dose value normally displayed in the upper left corner when pointing in the 2D view may be incorrect or missing.

On October 11, 2016 RaySearch Laboratories distributed a Field Safety Notice, Medical Device Correction #13529 to customers via email. Customers were instructed to take caution when a patient has multiple cases. The following may be incorrect if there are image sets that shre the same Frame of Reference residing in different cases: *Display of evaluation dose computed on another CT image set and *Dose tracking fraction dose and deformed dose. Until a corrected version has been installed, all affected users must maintain awareness of this field safety notice. In these cases, the display of the dose values in the 2D view, including the dose value shown when pointing in the view, maximum dose position, dynamic isodose lines and dose grid display may be incorrect. Customers are encouraged to educate staff and all users about this. For regulatory information, please contact David Hedfors, at +46 8 510 530 12 or [email protected].