Bone marrow for assessing the marrow cavity of bones, although with low sensitivity and specificity. For example, normal fatty "yellow" marrow in adult long bones is of low density (-30 to -100 Hounsfield units), between subcutaneous fat and soft tissue. Tissue with increased cellular composition, such as normal "red" marrow or cancer cells within the medullary cavity will measure variably higher in density. MRI is more sensitive and specific for assessing bone bone composition. MRI enables assessment of the average molecular composition of soft tissues, and thus provides information regarding the relative fat content of marrow. In adult humans, "yellow" fatty marrow
Generative tissue becoming a living tissue. To date, the types of gTissue created can be characterized as variants of soft connective tissues including dermis, tendon, ligament, and fascia. Initially the cell-free ECM biomaterial is implanted and progressively adopted by the host. Immediately upon surgical implantation, the porous material becomes soaked in blood. This seeds the material with a population of circulating stem cells, and growth factors to support gTissue development. As generation progresses, the growth factors, cytokines, and fibrin provisional matrix signals host cells to repopulate the matrix. To support the metabolic activity of these cells, a vascular network is simultaneously created