Results of penetration depth, superficial skin thickness calculations, and reproducibility measurements. Sanathana Konugolu Venkata Sekar Marco Pagliazzi Eugènia Negredo Fabrizio Martelli Andrea Farina Alberto Dalla Mora Claus Lindner Parisa Farzam Núria Pérez-Álvarez Jordi Puig Paola Taroni Antonio Pifferi Turgut Durduran 10.1371/journal.pone.0168426.g002 https://plos.figshare.com/articles/figure/Results_of_penetration_depth_superficial_skin_thickness_calculations_and_reproducibility_measurements_/4485386 <p><b>(a) Theoretical prediction of spectrally resolved penetration depth of TRS at each location</b>. DCS penetration is facilitated by operating at the wavelength of maximum penetration (785nm). The inset figure shows the DEXA scan and skin caliper measurements of superficial skin thickness (mean ± SD), and the mean maximum penetration depth for TRS averaged over 630–1100 nm range and CW at 785 nm. Proximal locations show relatively lower penetration depth than distal locations. <b>(b) Repeatability measurements</b> on the absorption spectrum (mean ± SD) at trochanter location, illustrating robustness and repeatability. The inset reports the CV for measurements performed with the two techniques (< 5% and 25% for TRS and DCS, respectively).</p> 2016-12-20 19:01:06 calcaneus bone bone locations Significant variations microvascular blood flow tissue constituents blood flow vivo characterization body locations Correlation Spectroscopies Non-invasive contrast agents broadband system oxygen consumption Time-Resolved Diffuse Optical Spectroscopy radius bone tissue Human Bone TRS oxygen metabolism DCS Diffuse Correlation Spectroscopy penetration depth Diffuse Optical Non-Invasive Characterization