Mourtzakis et al used computed tomography (CT) scans to estimate fat and fat free mass in patients. The authors are from the University of Alberta in Canada.
Examination: CT scan at L3 level
(1) skeletal muscle area in square cm
(2) total adipose tissue area in square cm
fat free mass (FFM) in kilograms =
= (0.3 * (area of skeletal muscle)) + 6.06
fat mass (FM) in kilograms =
= (0.042 * (area adipose tissue)) + 11.2
Hopefully adding the 2 results together will approximate the patient's weight.
• The equation for FFM has an r = 0.94, p <0.001, SEE = 0.72 kg.
• The equation for fat mass has an r = 0.88, p < 0.001, SEE = 0.80 kg
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