Muscle Quality

DEXA is useful for fat and bone but does not directly measure skeletal muscle mass or tissue quality. Muscle quality is presented as just as important as muscle quantity. Lean body mass on a scan does not necessarily show true skeletal muscle or fat infiltration. The article says optimal skeletal muscle mass and quality are hard to define because current tools and standards are limited. MRI or CT may better assess true muscle and intramuscular fat, but they are not routinely used for that purpose in most research or clinical settings.