The manner, procedure or technique by which a morphological or physiological state or property in a bone is assessed and a quantitative or qualitative value assigned. An isolated body part is a subdivision of the material or physical structure of an organism, such as an organ, extremity or tissue, after it has been removed from the body. Bone is the hard, rigid form of connective tissue constituting most of the skeleton of vertebrates and composed chiefly of calcium salts.