High-NA-based virtual point detectors for photoacoustic imaging

Changhui Li; Lihong V. Wang

doi:10.1117/12.808514

24 February 2009 High-NA-based virtual point detectors for photoacoustic imaging

Changhui Li, Lihong V. Wang

Proceedings Volume 7177, Photons Plus Ultrasound: Imaging and Sensing 2009; 71770R (2009) https://doi.org/10.1117/12.808514
Event: SPIE BiOS, 2009, San Jose, California, United States

Abstract

We demonstrated the focal point of a high-numerical-aperture (NA) ultrasonic transducer can be used as a virtual point detector. This virtual point detector detects omnidirectionally over a wide acceptance angle. It also combines a large active transducer surface and a small effective virtual detector size, thus the sensitivity is high compared with that of a real point detector, and the aperture effect is small compared with that of a finite size transducer. Phantom experiments are provided to demonstrate the applications of high-NA-based virtual point detectors in photoacoustic tomography and thermoacoustic tomography. The virtual point detector is also used to image the cerebral cortex of mice.

Citation Download Citation

Changhui Li and Lihong V. Wang "High-NA-based virtual point detectors for photoacoustic imaging", Proc. SPIE 7177, Photons Plus Ultrasound: Imaging and Sensing 2009, 71770R (24 February 2009); https://doi.org/10.1117/12.808514

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KEYWORDS

Transducers

Sensors

Acquisition tracking and pointing

Ultrasonics

Ferroelectric polymers

Signal detection

Tomography

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