Brand Name: RayStation- Intended as a Radiation Therapy Treatment Planning System Model/Catalog Number: 13.0.0.1547, 13.1.0.144, 13.1.1.89 and 14.0.0.3338 Software Version: RayStation 12A, 12A Service Pack 1 and 2 and 2023B

Reason: Inconsistency in the use of Density uncertainty in the RayStation functions Robust optimization, Robust evaluation and Compute perturbed dose for proton and light ion treatment plans when a HU-to-mass density CT calibration curve used in RayStation version 4.5 to 2024B including some service packs.

Code information: Lot Code: UDI: 0735000201054920220616, 0735000201067920221007, 0735000201073020230913 and 0735000201055620230630 GTIN: 07350002010549, 07350002010679, 07350002010730 and 07350002010556 Serial Numbers: 13.0.0.1547, 13.1.0.144, 13.1.1.89 and 14.0.0.3338 Software Revisions: RayStation 12A, 12A Service Pack 1 and 2 and 2023B Expiration Date: 2028-07-07

Distribution pattern: Worldwide distribution - US Nationwide and the countries of Australia, Austria, Belgium, Belgium ENG, Canada, China, China APactron, Denmark, France, Germany, Hong Kong S.A.R. China, India, Italy, Japan, Korea, Netherlands, Norway, Poland, Singapore, Spain, SwitzerlandENG, Taiwan, Thailand, UK.