Scanning head with 128-element 20-MHz PVDF linear array transducer.

A scanning head has been designed and fabricated that incorporates a 20-MHz, 128-element linear transducer. The scanning head also incorporates -200 V pulsers and a custom 16-channel amplifier. The transducer was constructed with 28 microm PVDF film with an element pitch of 250 microm.