Non-telecentric photoacoustic microscopy for multi-scale imaging

Opt Lett. 2024 May 15;49(10):2637-2640. doi: 10.1364/OL.519330.

Abstract

Optical-resolution photoacoustic microscopy (OR-PAM) excels in precisely imaging a biological tissue based on absorption contrast. However, existing OR-PAMs are confined by fixed compromises between spatial resolution and field of view (FOV), preventing the integration of large FOV and local high-resolution within one system. Here, we present a non-telecentric OR-PAM (nTC-PAM) that empowers efficient adaptation of FOV and spatial resolution to match the multi-scale requirement of diverse biological imaging. Our method allows for a large-scale transformation in FOV and even surpassing the nominal FOV of the objective with minimal marginal degradation of the lateral resolution. We demonstrate the advantage of nTC-PAM through multi-scale imaging of the leaf phantom, mouse ear, and cortex. The results reveal that nTC-PAM can switch the FOV and spatial resolution to meet the requirements of different biological tissues, such as large-scale imaging of the whole cerebral cortex and high-resolution imaging of microvascular structures in local brain regions.

MeSH terms

  • Animals
  • Ear / blood supply
  • Ear / diagnostic imaging
  • Mice
  • Microscopy* / methods
  • Phantoms, Imaging
  • Photoacoustic Techniques* / methods