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Related Experiment Video

Updated: Jun 5, 2026

Fluorescence Lifetime Macro Imager for Biomedical Applications
06:01

Fluorescence Lifetime Macro Imager for Biomedical Applications

Published on: April 7, 2023

Angular domain fluorescence lifetime imaging: a tissue-like phantom study.

Mohamadreza Najiminaini1, Fartash Vasefi, Kenneth M Tichauer

  • 1Imaging Program, Lawson Health Research Institute, London, ON, Canada.

Optics Express
|December 18, 2010
PubMed
Summary
This summary is machine-generated.

We developed Angular Domain Fluorescence Lifetime Imaging (ADFLI) using an angular filter array (AFA) for deep tissue imaging. This new technique significantly improves spatial resolution and image contrast for fluorescent probes in turbid media.

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Area of Science:

  • Biomedical Optics
  • Fluorescence Imaging
  • Photonics

Background:

  • Accurate fluorescence lifetime imaging is crucial for deep tissue diagnostics.
  • Conventional imaging systems struggle with scattering and limited depth penetration in turbid media.
  • Minimally scattered photons hold vital information for enhanced imaging.

Purpose of the Study:

  • To introduce and evaluate a novel Angular Domain Fluorescence Lifetime Imaging (ADFLI) technique.
  • To assess the performance of ADFLI using an angular filter array (AFA).
  • To compare ADFLI's capabilities against conventional lens and pinhole imaging systems for deep tissue fluorescence detection.

Main Methods:

  • Development of an Angular Domain Fluorescence Lifetime Imaging (ADFLI) system utilizing an angular filter array (AFA).
  • The AFA was designed to accept minimally scattered photons from fluorophores up to 2 mm deep.
  • Performance evaluation involved comparative analysis with a conventional lens and pinhole system using a tissue-mimicking phantom.

Main Results:

  • ADFLI effectively utilizes minimally scattered photons for imaging deep within turbid media.
  • The technique demonstrated superior spatial resolution compared to conventional systems.
  • Enhanced image contrast was achieved for fluorescent probes at greater depths with ADFLI.

Conclusions:

  • Angular Domain Fluorescence Lifetime Imaging (ADFLI) offers significant advantages for deep tissue fluorescence imaging.
  • The use of an angular filter array (AFA) enhances imaging performance by managing scattered photons.
  • ADFLI represents a promising advancement over conventional methods for visualizing fluorescent probes in scattering biological tissues.