Multimodal multiplex Raman spectroscopy optimized for in vivo chemometrics

S. T. McCain, M. E. Gehm, Y. Wang, N. P. Pitsianis, D. J. Brady

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


We have designed and constructed a multimodal multiplex Raman spectrometer which uses multi-wavelength excitation to better detect signals in the presence of fluorescence by taking advantage of the shift-variance of the Raman signal with respect to excitation frequency. Coupled with partial-least-squares (PLS) regression, the technique applied to ethanol estimation in a tissue phantom achieves root-mean-squared-cross-validation errors (RMSCVE) of 9.2 mmol/L with a model formed with 2 principal components, compared to a single wavelength data set with equivalent energy where 7 principal components were used to achieve an RMSCVE of 39.1 mmol/L.

Original languageEnglish (US)
Article number60930P
JournalProgress in Biomedical Optics and Imaging - Proceedings of SPIE
StatePublished - 2006
Externally publishedYes
EventBiomedical Vibrational Spectroscopy III: Advances in Research and Industry - San Jose, CA, United States
Duration: Jan 21 2006Jan 24 2006


  • Chemometrics
  • Multivariate Methods
  • Raman Spectroscopy
  • Tissue Spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


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