The CT ACR 464 Phantom is designed for comprehensive testing in line with ACR accreditation guidelines. It evaluates critical parameters such as CT number accuracy, low contrast detectability, spatial resolution, and alignment. Made from zero HU solid water, it supports precise inter- and intra-plane distance checks. The 20 cm diameter phantom weighs 5.3 kg and measures 16 cm in length, offering a versatile solution for consistent CT image quality assessments.