Bone density tests are very necessary, and most of the people who need them in their lives are children or elderly patients. Because children’s bone development will change as they grow up, a bone density test can determine whether the child has calcium deficiency, osteoporosis or bone growth lesions to ensure that the child can grow up healthy. For the elderly, a bone density test is necessary to determine whether the elderly are suffering from osteoporosis or malnutrition. Through the bone density examination to find that the child has calcium deficiency, osteoporosis, or the elderly people have such conditions, you can take appropriate treatment measures in time. You can be sent to the hospital in time for examination and choose to carry out medication to promote the healthy development of children and the elderly.