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Published June 18, 2007 | Published
Journal Article Open

Ring-based ultrasonic virtual point detector with applications to photoacoustic tomography


An ultrasonic virtual point detector is constructed using the center of a ring transducer. The virtual point detector provides ideal omnidirectional detection free of any aperture effect. Compared with a real point detector, the virtual one has lower thermal noise and can be scanned with its center inside a physically inaccessible medium. When applied to photoacoustictomography, the virtual point detector provides both high spatial resolution and high signal-to-noise ratio. It can also be potentially applied to other ultrasound-related technologies.

Additional Information

© 2007 American Institute of Physics. Received 02 April 2007; Accepted 24 May 2007; Published online 19 June 2007. This project was sponsored in part by National Institutes of Health under Grant Nos. R01 NS46214 and R01 EB000712.

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