Cited by 22Optical Imaging and Spectroscopy TechniquesSpectroscopy Techniques in Biomedical and Chemical ResearchPhotodynamic Therapy Research Studies

Characterizing short-wave infrared fluorescence of conventional near-infrared fluorophores

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Byrd, Brook K., Folaron, Margaret R., Leonor, Joseph P., Strawbridge, Rendall R., Cao, Xu, Brůža, Petr, Davis, Scott C.·2019·Journal of Biomedical Optics

Abstract

The observed behavior of short-wave infrared (SWIR) light in tissue, characterized by relatively low scatter and subdiffuse photon transport, has generated considerable interest for the potential of SWIR imaging to produce high-resolution, subsurface images of fluorescence activity in vivo. These properties have important implications for fluorescence-guided surgery and preclinical biomedical research. Until recently, translational efforts have been impeded by the conventional understanding that fluorescence molecular imaging in the SWIR regime requires custom molecular probes that do not yet have proven safety profiles in humans. However, recent studies have shown that two readily available near-infrared (NIR-I) fluorophores produce measurable SWIR fluorescence, implying that other conventional fluorophores produce detectable fluorescence in the SWIR window. Using SWIR spectroscopy and wide-field SWIR imaging with tissue-simulating phantoms, we characterize and compare the SWIR emission properties of eight commercially available red/NIR-I fluorophores commonly used in preclinical and clinical research, in addition to a SWIR-specific fluorophore. All fluorophores produce measurable fluorescence emission in the SWIR, including shorter wavelength dyes such as Alexa Fluor 633 and methylene blue. This study is the first to report SWIR fluorescence from six of the eight conventional fluorophores and establishes an important comparative reference for developing and evaluating SWIR imaging strategies for biomedical applications.

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Authors
Byrd, B. K., Folaron, M. R., Leonor, J. P., Strawbridge, R. R., Cao, X., Brůža, P., & Davis, S. C.
Affiliations
Dartmouth College (US)
Corresponding author
Davis, Scott C.
Venue
Journal of Biomedical Optics
Published
2019-03-08
Volume
24
Issue
03
Pages
1-5
ISSN
  • 1083-3668 (ISSN-L)
  • 1560-2281
OpenAlex
W2921171109
Cited by
22
References
16
Citations by year
2025: 2 · 2024: 1 · 2023: 3 · 2022: 3 · 2021: 6 · 2020: 4 · 2019: 3
FWCI
2.64
Type
journal article
Language
en
Open access
Locations
  • Journal of Biomedical Optics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (R01CA188491, R01CA184354)
  • HHS|NIH|National Cancer Institute (R01CA188491)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Spectroscopy Techniques in Biomedical and Chemical Research
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
Keywords
near-infrared fluorophores, SWIR imaging, fluorescence molecular imaging, tissue phantoms, fluorescence-guided surgery, methylene blue
MeSH terms
Equipment Design, Fluorescent Dyes, Phantoms, Imaging, Spectroscopy, Near-Infrared, Optical Imaging

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