Shortwave-infrared meso-patterned imaging enables label-free mapping of tissue water and lipid content

Nat Commun. 2020 Oct 23;11(1):5355. doi: 10.1038/s41467-020-19128-7.

Abstract

Water and lipids are key participants in many biological processes, but there are few non-invasive methods that provide quantification of these components in vivo, and none that can isolate and quantify lipids in the blood. Here we develop a new imaging modality termed shortwave infrared meso-patterned imaging (SWIR-MPI) to provide label-free, non-contact, spatial mapping of water and lipid concentrations in tissue. The method utilizes patterned hyperspectral illumination to target chromophore absorption bands in the 900-1,300 nm wavelength range. We use SWIR-MPI to monitor clinically important physiological processes including edema, inflammation, and tumor lipid heterogeneity in preclinical models. We also show that SWIR-MPI can spatially map blood-lipids in humans, representing an example of non-invasive and contact-free measurements of in vivo blood lipids. Together, these results highlight the potential of SWIR-MPI to enable new capabilities in fundamental studies and clinical monitoring of major conditions including obesity, cancer, and cardiovascular disease.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adipose Tissue, Brown / diagnostic imaging
  • Adipose Tissue, Brown / pathology
  • Adult
  • Animals
  • Biomarkers / blood
  • Cardiovascular Diseases / diagnostic imaging
  • Edema / diagnostic imaging
  • Edema / pathology
  • Female
  • Heterografts
  • Humans
  • Inflammation / diagnostic imaging
  • Inflammation / pathology
  • Infrared Rays*
  • Lipids / blood*
  • Male
  • Mice
  • Mice, Inbred BALB C
  • Mice, Inbred C57BL
  • Middle Aged
  • Neoplasms / diagnostic imaging
  • Neoplasms / pathology
  • Obesity / diagnostic imaging
  • Optical Imaging / instrumentation
  • Optical Imaging / methods*
  • Prostatic Neoplasms / diagnostic imaging
  • Prostatic Neoplasms / pathology
  • Radio Waves*
  • Spectroscopy, Near-Infrared / instrumentation
  • Spectroscopy, Near-Infrared / methods*
  • Water / analysis*

Substances

  • Biomarkers
  • Lipids
  • Water