Patent ID: 8433382

Claim:
A monitoring system, comprising: a modulator configured to modulate light to generate photon density waves at a modulation frequency generally in a range of 50 MHz to 3 GHz; one or more configured to be emission features disposed on a first side of a tissue of a patient and configured to emit the photon density waves into the first side of the tissue; one or more detection features configured to be disposed on a second side of the tissue, generally opposite the first side, and configured to receive the photon density waves at the second side of the tissue, wherein at least one of the one or more detection features is directly aligned with at least one of the one or more emission features; one or more detectors respectively communicatively coupled with the one or more detection features, wherein the one or more detectors are configured to detect characteristics of the photon density waves comprising amplitude changes and phase shifts; and a processor configured to make determinations relating to a value of a physiologic parameter of the tissue based at least in part on the detected characteristics.