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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

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Multispectral Real-time Fluorescence Imaging for Intraoperative Detection of the Sentinel Lymph Node in Gynecologic Oncology
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Quantitative, spectrally-resolved intraoperative fluorescence imaging.

Pablo A Valdés1, Frederic Leblond, Valerie L Jacobs

  • 1Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA. Pablo.A.Valdes@Dartmouth.edu

Scientific Reports
|November 16, 2012
PubMed
Summary
This summary is machine-generated.

Quantitative fluorescence imaging (qFI) offers precise, pixel-by-pixel measurements of fluorophore concentration during surgery. This new technique improves tumor margin detection in glioma models and human surgeries compared to current visual methods.

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Area of Science:

  • Medical imaging
  • Surgical technology
  • Biophotonics

Background:

  • Intraoperative visual fluorescence imaging (vFI) aids surgical guidance but has limitations.
  • Current vFI does not fully utilize available fluorescent agent potential.
  • Need for more precise and quantitative intraoperative imaging techniques.

Purpose of the Study:

  • Introduce a quantitative fluorescence imaging (qFI) approach.
  • Enable pixel-by-pixel measurement of absolute fluorophore concentration.
  • Demonstrate spectral decomposition of multiple fluorophores.

Main Methods:

  • Developed a qFI system converting spectrally-resolved data into quantitative images.
  • Validated accuracy, precision, and linearity of qFI measurements.
  • Applied qFI in a glioma rodent model and human surgery.

Main Results:

  • Achieved linear, accurate, and precise estimates of absolute fluorophore concentration.
  • Successfully performed in vivo quantitative and spectrally-resolved imaging of glioma margins.
  • Detected residual human tumors missed by state-of-the-art vFI.

Conclusions:

  • Wide-field qFI provides near real-time quantitative assessment of fluorescent biomarkers.
  • qFI significantly enhances intraoperative surgical guidance.
  • This technique has broad implications for improving surgical outcomes.