Artificial Intelligence for Label-Free Imaging and Spectroscopy in the Life Sciences

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Biophotonics and Biomedical Optics".

Deadline for manuscript submissions: 1 June 2026 | Viewed by 774

Special Issue Editor


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Guest Editor
MIT G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA
Interests: biophotonics; raman spectroscopy; label-free optical imaging; AI-powered biomedicine; morpho-molecular phenotyping; live cell imaging; data-driven bioimaging; multimodal optical microscopy; deep learning

Special Issue Information

Dear Colleagues,

Label-free optical microscopy and spectroscopy are powerful tools for investigating biological materials in a non-invasive and quantitative manner. However, the high-dimensional datasets produced by these techniques are often affected by noise, overlapping signals, and spurious background, creating barriers to extracting meaningful patterns, ensuring reliable interpretation, and achieving translational utility. Artificial Intelligence (AI) has emerged as a transformative solution, offering new strategies to obtain robust, interpretable insights from complex optical data and bridging the gap between photonics and life sciences.

We are pleased to invite you to contribute to this Special Issue, which seeks contributions that demonstrate how the synergy between AI and label-free optical imaging and spectroscopy can advance our understanding of life sciences. We welcome original research and review articles addressing both methodological innovations and application-driven studies. Emphasis will be placed on works that prioritize model transparency, generalizability, and biological relevance, with interpretable and physics-informed approaches encouraged.

The collection will focus on two main contribution areas:

  • AI for biophotonic data preprocessing: AI-based methods for spectral and spatial denoising, background subtraction, and signal unmixing, particularly in low-SNR or complex biological environments.
  • AI for biophotonic data analysis: AI-based quantitative analysis, including regression models to predict analyte concentrations and classification models for cell states, disease presence or stage, drug response, image segmentation, and more.

Relevant label-free optical techniques include, but are not limited to, the following: Raman, Brillouin, infrared, and photothermal spectroscopy; multi-harmonic and multiphoton fluorescence imaging; quantitative phase imaging; and optical coherence tomography. Applications may involve cells, tissues, organoids, pharmaceutical formulations, bioderived and bioinspired materials, or biohazards.

We look forward to receiving your contributions.

Dr. Arianna Bresci
Guest Editor

Manuscript Submission Information

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Keywords

  • artificial intelligence
  • biphotonics
  • label-free imaging
  • machine learning
  • microscopy
  • spectroscopy
  • optical biosensing
  • data-driven photonics

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Published Papers (1 paper)

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Research

12 pages, 2913 KB  
Article
Molecular Histology for Azoospermia by Submicron-Resolution Mid-IR Photothermal Spectroscopy
by Zhengyan Wu, Zhicong Chen, Pengcheng Fu, Delong Zhang, Geng An and Hyeon Jeong Lee
Photonics 2026, 13(4), 348; https://doi.org/10.3390/photonics13040348 - 3 Apr 2026
Viewed by 445
Abstract
Non-obstructive azoospermia (NOA), a severe male infertility condition with impaired or absent sperm production, is treated by microsurgical testicular sperm extraction (micro-TESE), whose success depends on identifying seminiferous tubules with active spermatogenesis. To address this challenge, we demonstrate that mid-infrared photothermal (MIP) microscopy [...] Read more.
Non-obstructive azoospermia (NOA), a severe male infertility condition with impaired or absent sperm production, is treated by microsurgical testicular sperm extraction (micro-TESE), whose success depends on identifying seminiferous tubules with active spermatogenesis. To address this challenge, we demonstrate that mid-infrared photothermal (MIP) microscopy can provide label-free molecular signatures to distinguish different NOA subtypes in patient tissues. We applied MIP microscopy and MIP-guided IR spectroscopy to testicular tissues from obstructive azoospermia (normal spermatogenesis) and idiopathic NOA (abnormal spermatogenesis) patients. Tissue classification was performed using a Singular Value Decomposition–Random Forest (SVD-RF) pipeline. MIP imaging revealed distinct lipid distribution and reduced lipid content in NOA tissues compared to normal spermatogenic tissues. Using SVD to extract spectroscopic features and RF for classification, we achieved 94.03% accuracy in distinguishing testicular tissues as normal spermatogenesis or three pathological subtypes of idiopathic NOA. These findings demonstrate MIP microscopy as an effective tool for characterizing the spermatogenic potential of seminiferous tubules based on their molecular composition, potentially facilitating improved sperm retrieval strategies. Full article
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