Nonlinear Trimodal Regression Analysis of Radiodensitometric Distributions to Quantify Sarcopenic and Sequelae Muscle Degeneration

Figure 3

Radiodensitometric distributions showing their respective nonlinear regression curves and average HU values. (a) The control subject’s curve showed a large muscle peak at around 55 HU, which directly contrasted with (b) the elderly subject’s distribution. (c) The pathological subject’s distribution was much lower in total pixel count (due to lower overall mass within the leg volume) and elicited fat and muscle peaks that are similar in amplitude with a large connective tissue regime between them.

(a)

(b)

(c)