One of their demo videos explains how inverting the scattering caused by the occluding body yields the mass-density at least (?). [Radio]Spectroscopy and quantum crystallography may have additional insight for tissue identification with low-cost NIRS sensor data?
> What about with realtime NIRS with an (inverse?) scattering matrix?
FWIU Openwater's technology portfolio includes targeted ultrasound with e.g. NIRS and LSI/LSCI: https://www.openwater.health/technology
One of their demo videos explains how inverting the scattering caused by the occluding body yields the mass-density at least (?). [Radio]Spectroscopy and quantum crystallography may have additional insight for tissue identification with low-cost NIRS sensor data?
Open fNIRS: https://openfnirs.org/
"Quantum light sees quantum sound: phonon/photon correlations" (2023) https://news.ycombinator.com/item?id=37793765 ; the photonic channel actually embeds the phononic field