Broadening the detection view of 2D photoacoustic tomography using two linear array transducers

Photoacoustic Microscopy and Photoacoustic Computed Tomography Using High-frequency Linear Array Ultrasonic Transducers

Tripling the detection view of high-frequency linear-array-based photoacoustic computed tomography by using two planar acoustic reflectors.

BACKGROUND Linear-array-based photoacoustic computed tomography (PACT) suffers from a limited view. Circular scanning does increase the detection view angle but is time-consuming. Therefore, it is desirable to increase the detection view angle of linear-array-based PACT without sacrificing imaging speed. METHODS Two planar acoustic reflectors placed at 120 degrees to each other were added to ...

Multiview Hilbert transformation for full-view photoacoustic computed tomography using a linear array.

Due to their low cost, hand-held convenience, wide selection of bandwidths, and ultrasound imaging capability, linear ultrasonic transducer arrays have been widely studied for photoacoustic computed tomography (PACT). As linear-array PACT suffers from a limited view, full-view imaging requires either the transducer or the object to be rotated. So far, both the central frequencies and bandwidth ...

Limited-view photoacoustic tomography utilizing backscatterers as virtual transducers

Photoacoustic tomography of monkey brain using virtual point ultrasonic transducers.

A photoacoustic tomography system (PAT) using virtual point ultrasonic transducers was developed and applied to image a monkey brain. The custom-built transducers provide a 10-fold greater field-of-view (FOV) than finite-aperture unfocused transducers as well as an improved signal-to-noise ratio (SNR) and reduced artifacts rather than negative-lens transducers. Their tangential resolution, radi...