The Catphan® 604 has been selected by Varian as an updated phantom to replace the Catphan® 504 phantom. The Catphan® 604 phantom is distributed through Varian to assist in the commissioning and QA of the OBI kV imager on its Linac systems. The Catphan® 604 phantom consists of 3 modules that cover all required CBCT imaging tests for TG142.