Photoacoustic-Ultrasound Tomography With S-Sequence Aperture Encoding.
A combined photoacoustic-ultrasound (PAUS) tomography system is introduced using ring-array and novel aperture encoding schemes. The ultrasound subsystem is able to achieve diffraction limited half-wavelength isotropic in-plane spatial resolution unlike previous systems. S-sequence aperture encoding improves signal-to-noise ratio (SNR) for the ultrasound tomography (UST) subsystem. We measured an average resolution of [Formula: see text] for S-sequence UST and a resolution of [Formula: see text] for photoacoustic tomography. We were able to measure SNR improvement using S-sequence spatial encoding using tissue-mimicking phantoms, and we displayed a composite PAUS phantom image.
Quinn M
QM
Barber
Roger J
RJ
Zemp
D000465:Algorithms; D004867:Equipment Design; D006197:Hair / Q000000981:diagnostic imaging; D006801:Humans; D019047:Phantoms, Imaging; D061088:Photoacoustic Techniques / Q000379:methods*; D059629:Signal-To-Noise Ratio; D014054:Tomography / Q000379:methods*; D014463:Ultrasonography / Q000379:methods*