Photo Credit George Doyle/Stockbyte/Getty Images. If a person experiences a drop in blood pressure, fever, diarrhea, loss of hydration from vomiting or dizziness, lightheadedness can occur. Further, if the brain does not receive enough blood, it can cause lightheadedness as well.eart Attack. Heart attack is one of the more serious conditions that cause lightheadedness. During a heart attack, oxygen is prevented from getting to the heart and the rest of the body when blood vessels are blocked, causing the head to feel light and weightless.
Screening for Osteoporosis. 1  An easy and painless procedure, an osteoporosis screening requires you to place your foot in an ultrasound device called a bone densitometer. 2  This device then measures the bone mineral density of your heel.steoporosis Screening/Bone Density Test. Osteoporosis is a disease in which bone becomes extremely fragile. Bone is a complex living tissue that can be weakened by poor diet and lack of exercise.
Bone Density Tests. Click for more information. The test used to diagnose osteoporosis is called a bone density test. This test is a measure of how strong -- or dense -- your bones are and can help your doctor predict your risk for having a fracture.Bone density tests are painless, safe, and require no preparation on your part.one density tests compare your bone density to the bones of an average healthy young adult. The test result, known as a T-score, tells you how strong your bones are, whether you have osteoporosis or osteopenia (low bone mass that is not low enough to be diagnosed as osteoporosis), and your risk for having a fracture.