|Title||Coded aperture Raman spectroscopy for quantitative measurements of ethanol in a tissue phantom.|
|Publication Type||Journal Article|
|Year of Publication||2006|
|Authors||ST McCain, ME Gehm, Y Wang, NP Pitsianis, and DJ Brady|
|Pagination||663 - 671|
Coded aperture spectroscopy allows for sources of large étendue to be efficiently coupled into dispersive spectrometers by replacing the traditional input slit with a patterned mask. We describe a coded aperture spectrometer optimized for Raman spectroscopy of diffuse sources, (e.g., tissue). We provide design details of the Raman system, along with quantitative estimation results for ethanol at non-toxic levels in a lipid tissue phantom. With 60 mW of excitation power at 808 nm, leave-one-out and blind cross-validation of partial least squares (PLS) regression models achieve r(2) > 0.98. Leave-one-out cross-validation demonstrates prediction errors of <15% at the common legal limit for intoxication (17.4 mmol/L = 0.08% by vol) and the best blind cross-validation achieves <12% error at this concentration.
|Short Title||Applied Spectroscopy|