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Updated: May 14, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy
Published on: May 3, 2011
Experimental study of z resolution in acousto-optical coherence tomography using random phase jumps on ultrasound and
Max Lesaffre1, Salma Farahi, François Ramaz
1Institut Langevin, ESPCI ParisTech, CNRS UMR 7587, Paris, France.
Abstract:
Acousto-optical coherence tomography (AOCT) is a variant of acousto-optic imaging (also called ultrasound modulated optical tomography) that makes possible to get resolution along the ultrasound propagation axis z. We present here AOCT experimental results, and we study how the z resolution depends on time step between phase jumps T(φ), or on the correlation length Δz. By working at low resolution, we perform a quantitative comparison of the z measurements with the theoretical point spread function. We also present images recorded with different z resolution, and we qualitatively show how the image quality varies with T(φ), or Δz.
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