The properties inside a human tissue as well as how those properties vary over time can include information of great importance to a healthcare provider. For example, the concentration of hemoglobin, oxygenated or nonoxygenated, blood flow velocity, body temperature, and even change in size of the tissue, can all be relevant to a doctors understanding of how a wound is healing. In some cases, the tissue of interest may not be easily accessible, as a tissue that is under a cast or beneath a bandage, or may be beneath a layer of skin that makes it difficult to evaluate the tissue visually or in a non-invasive manner. Improved systems and methods for evaluating and monitoring tissues are needed. A system for monitoring tissue at a plurality of depths can include a sensor strip, a data acquisition module and analysis software. The sensor strip can have a first side including a first photodetector element and a plurality of light-emitting elements, wherein the plurality of light-emitting elements are disposed in a predetermined configuration relative to the photodetector element. The data acquisition module can be capable of being coupled to the sensor strip, wherein the data acquisition module is configured to control the sensor strip and store signals received from the light-emitting elements. The analysis software can analyze and/or display the received signals. The system can be adapted to be placed on the surface of a patients skin, e.g., under a cast, splint, or dressing. The sensor strip can be adapted to be placed over an area of a patients body, e.g., that has suffered trauma.Les propriétés internes dun tissu humain ainsi que la façon dont ces propriétés varient dans le temps peuvent contenir des informations de grande importance pour un prestataire de soins de santé. Par exemple, la concentration dhémoglobine, oxygénée ou pas, la vitesse de lécoulement sanguin, la température corporelle, voire le changement de taille du tissu, peuvent tous participer à la compr
