Final answer:
Dual-energy X-ray absorptiometry (DEXA) is a diagnostic test used to measure bone density. It involves directing two low-dose X-ray beams through the body. Lab tests are not necessary for DEXA, as the scan itself provides the information on bone density.
Step-by-step explanation:
Dual-energy X-ray absorptiometry (DEXA) is a common diagnostic test used to measure bone density. It works by directing two low-dose X-ray beams through the body and determining the amount of energy absorbed.
This information can help identify individuals with low bone density, such as in the case of osteoporosis. Lab tests are typically not required for DEXA, as the scan itself provides the necessary information on bone density.