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.
A DEXA scan is a technique that is used to measure the density of bone mineral. This is one of the most accurate tests available today and is presently the most widely used technique that is used to measure bone density.Doctors, with the help of a DEXA scan, are able to confirm or verify the condition osteoporosis.They are also able to estimate how severe the bone loss is and figure out if your response to the treatment is good.octors, with the help of a DEXA scan, are able to confirm or verify the condition osteoporosis. They are also able to estimate how severe the bone loss is and figure out if your response to the treatment is good.