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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 66, Iss. 12 — Dec. 1, 2012
  • pp: 1403–1410

Intrinsic Versus Laser-Induced Fluorescence Spectroscopy for Coronary Atherosclerosis: A Generational Comparison Model for Testing Diagnostic Accuracy‡

George O. Angheloiu, Sweder W.E. van de Poll, Irene Georgakoudi, Jason T. Motz, Abigail S. Haka, Eugene Podrez, Maryann Fitzmaurice, Ramachandra R. Dasari, Michael S. Feld, and John R. Kramer

Applied Spectroscopy, Vol. 66, Issue 12, pp. 1403-1410 (2012)


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Abstract

Laser-induced fluorescence (LIF) and intrinsic fluorescence spectroscopy (IFS) have been used experimentally for diagnosing coronary atherosclerosis. In this study, we demonstrated the diagnostic superiority of IFS at 342-nm excitation (IFS342) versus LIF (LIF342) and described a protocol for head-to-head comparison of old (LIF) versus new (IFS) generations of similar diagnostic methods, labeled as “generational comparison model”. IFS342 and LIF342 were modeled with basis spectra of media, fibrous caps, and superficial foam cells and of their correspondent chemicals (elastin, collagen, and lipoproteins). The average accuracy and receiver operating characteristic area under the curve of IFS342 in single-, double-, and triple-parameter diagnostic algorithm iterations, geared toward identifying 84 atherosclerotic specimens from a group of 117 coronary segments, was 90% ± 1% and 0.87 ± 0.025, superior to LIF342 (84% ± 3% and 0.84 ± 0.016; P = 0.0002 and 0.02, respectively) in a generational comparison model.

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Citation
George O. Angheloiu, Sweder W.E. van de Poll, Irene Georgakoudi, Jason T. Motz, Abigail S. Haka, Eugene Podrez, Maryann Fitzmaurice, Ramachandra R. Dasari, Michael S. Feld, and John R. Kramer, "Intrinsic Versus Laser-Induced Fluorescence Spectroscopy for Coronary Atherosclerosis: A Generational Comparison Model for Testing Diagnostic Accuracy‡," Appl. Spectrosc. 66, 1403-1410 (2012)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-66-12-1403


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