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Research Abstracts Online
January 2010 - March 2011

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University of Minnesota Twin Cities
College of Science and Engineering
Department of Biomedical Engineering

PI: Shai Ashkenazi

Optoacoustic Ultrasound Transducers

Optoacoustic technology is an alternative to current piezoelectric ultrasound transducer technology. It is based on laser generation of acoustic waves and laser detection of surface displacements induced by acoustic waves. The advantages of optoacoustic technology are in high sensitivity and small size. These researchers develop optical devices for the design of miniaturized ultrasound probes that can be used in medical applications such as intravascular imaging, image guided surgery, and biopsy guiding. The challenge is to design highly compact optical resonators and absorbers that are efficient in generating and detection of ultrasound and can be integrated into a catheter compatible packaging. Another challenging problem is the design of multi-channel high-bandwidth optical communication channels that can deliver optical signal to and from the optoacoustic probe. In the process of designing and optimizing optoacoustic probes the researchers rely on numerical simulations and computer models to assess optical properties, acoustic coupling efficiency and heat flow within the device.

Group Members

Vishupriya Govindan, Research Associate
Clay Sheaff, Graduate Student
Mohammad Amin Tadayon, Graduate Student
Pankaj Vasandani, Graduate Student