Analytical and Bioanalytical Chemistry

, Volume 384, Issue 1, pp 145–154

Delimitation of squamous cell cervical carcinoma using infrared microspectroscopic imaging

  • Wolfram Steller
  • Jens Einenkel
  • Lars-Christian Horn
  • Ulf-Dietrich Braumann
  • Hans Binder
  • Reiner Salzer
  • Christoph Krafft
Paper in Forefront

DOI: 10.1007/s00216-005-0124-4

Cite this article as:
Steller, W., Einenkel, J., Horn, LC. et al. Anal Bioanal Chem (2006) 384: 145. doi:10.1007/s00216-005-0124-4
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Abstract

Infrared (IR) spectroscopic imaging coupled with microscopy has been used to investigate thin sections of cervix uteri encompassing normal tissue, precancerous structures, and squamous cell carcinoma. Methods for unsupervised distinction of tissue types based on IR spectroscopy were developed. One-hundred and twenty-two images of cervical tissue were recorded by an FTIR spectrometer with a 64×64 focal plane array detector. The 499,712 IR spectra obtained were grouped by an approach which used fuzzy C-means clustering followed by hierarchical cluster analysis. The resulting false color maps were correlated with the morphological characteristics of an adjacent section of hematoxylin and eosin-stained tissue. In the first step, cervical stroma, epithelium, inflammation, blood vessels, and mucus could be distinguished in IR images by analysis of the spectral fingerprint region (950–1480 cm−1). In the second step, analysis in the spectral window 1420–1480 cm−1 enables, for the first time, IR spectroscopic distinction between the basal layer, dysplastic lesions and squamous cell carcinoma within a particular sample. The joint application of IR microspectroscopic imaging and multivariate spectral processing combines diffraction-limited lateral optical resolution on the single cell level with highly specific and sensitive spectral classification on the molecular level. Compared with previous reports our approach constitutes a significant progress in the development of optical molecular spectroscopic techniques toward an additional diagnostic tool for the early histopathological characterization of cervical cancer.

Keywords

Cervix uteri Squamous cell carcinoma Infrared imaging Cluster analysis Tissue classification 

Abbreviations

IR

Infrared

Pap

Papanicolaou

H&E

Hematoxylin and eosin

FPA

Focal plane array

FT

Fourier transform

FCM

Fuzzy C-means

HCA

Hierarchical cluster analysis

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Wolfram Steller
    • 1
  • Jens Einenkel
    • 2
  • Lars-Christian Horn
    • 3
  • Ulf-Dietrich Braumann
    • 4
  • Hans Binder
    • 4
  • Reiner Salzer
    • 1
  • Christoph Krafft
    • 1
  1. 1.Institute for Analytical ChemistryDresden University of TechnologyDresdenGermany
  2. 2.Department of Obstetrics and GynecologyUniversity of LeipzigLeipzigGermany
  3. 3.Institute of PathologyUniversity of LeipzigLeipzigGermany
  4. 4.Interdisciplinary Centre for BioinformaticsUniversity of LeipzigLeipzigGermany

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