<human>:  Would dual-energy X-ray absorptiometry be useful if performed on a crab?
<bot>: No, dual-energy X-ray absorptiometry would not be useful if performed on a crab. Dual-energy X-ray absorptiometry is typically used to diagnose and follow osteoporosis. Osteoporosis is a disease in which bone weakening increases the risk of a broken bone. Crabs are invertebrates.