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This paper presents a systematic ultrasonic Doppler measurement of retinal blood flow in vivo. In the method, a needle transducer with a beveled tip of 45deg was inserted into the vitreous cavity to access retinal vessels in the rabbit eye. A directional high-frequency (HF) pulsed-wave (PW) Doppler system was used to measure the blood flow velocity from different locations of rabbit retina vessels...
A high-frequency angled needle ultrasound transducer with an aperture size of 0.4 times 0.56 mm2 was fabricated using a lead zinc niobate-lead titanate (PZN-7%PT) single crystal as the active piezoelectric material. The single crystal was bonded to a conductive silver particle matching layer and a conductive epoxy backing material through direct contact curing. A parylene outer matching layer was...
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