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Spatial frequency domain imaging (SFDI) is a wide-field imaging technique that provides quantitative tissue optical property maps. We describe a compact, multi-aperture SFDI imager for burn severity evaluation. This was constructed using a CMOS sensor subdivided into multiple regions, each having a bandpass filter and objective lens. This compound-eye design enables simultaneous image acquisition at multiple wavelengths. The imager was evaluated using a rat burn model and compared to conventional SFDI devices that acquire wavelength data sequentially. The burns showed a decrease in the reduced scattering coefficient that is consistent with previously reported changes in full thickness burns.
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Gordon T. Kennedy, Keiichiro Kagawa, Adrien Ponticorvo, Rebecca Rowland, Jun Tanida, Anthony J. Durkin, "A compact spatial frequency domain burn imager employing a compound–eye camera," Proc. SPIE 11618, Photonics in Dermatology and Plastic Surgery 2021, 116180H (5 March 2021); https://doi.org/10.1117/12.2579125