Munich/Berlin: German health group Siemens Healthineers said on Sunday it was buying Varian Medical Systems Inc of the United States for $16.4 billion in a deal that seeks to create the global leader in cancer care solutions.The deal is the first major growth move by Healthineers since it was spun off and floated in 2018 by Siemens, which is undertaking a broader shakeup of its conglomerate structure to create room for its business units to do their own deals.Siemens, which will retain control over Healthineers, will provide bridge financing for the deal that will be partly refinanced by a rights issue by the medical technology unit later this year.Under the agreed transaction, Healthineers will acquire all shares in Varian for $177.50 each.