A nurse is preparing a patient for a dual-energy x-ray absorptiometry scan (DXA). The nurse provides education about the purpose of the procedure. What is the most appropriate explanation to give the patient?

The test identifies the presence of microorganisms in the bone marrow.

The test evaluates joint cartilage for damage due to arthritis.

The test measures bone mineral density to assess for osteoporosis.

The test determines the electrical activity of muscles around the bones.