Medison P2-4AH Phased Array Ultrasound Transducer Scanhead Professional medical diagnostic ultrasound transducer scanhead designed for precise imaging applications. Product Specifications Product Type Ultrasound Probe Array / Crystal / Scanhead / Acoustic Module / Transducer Brand Medison Model Number P2-4AH Probe Type Phased array Technical Overview Material Composition The active element is typically made of piezoelectric crystals or newer materials for higher sensitivity