What is it? A DEXA Scan (bone density study) measures the calcium content or bone mineral density (BMD) of your bones. A densiometer, used for this exam is a scanner that emits tiny amounts of radiation. Scans of the low back, hip and forearm are tested most often. The result of your BMD test is a T-score, which compares your bone mass to that of a population of normal young adult women. You may be having this test because you are at risk of osteoporosis. Another reason for testing may be a recheck to see if your medication is slowing down the bone-loss process. Who Should Get Tested? The National Osteoporosis Foundation offers the following recommendations for those who should receive a BMD test: All women over age 65. All postmenopausal women under 65 with other risk factors such as: Asian or Caucasian descent and slender build. Postmenopausal women with fractures. Women who are considering therapy for osteoporosis, if a BMD test would facilitate the decision. Women who have been on hormone replacement therapy for prolonged periods of time. Before the Procedure Please wear comfortable clothing without metal closures (such as hooks, zippers, or snaps). Please leave any other articles that are metallic, such as jewelry, at home if at all possible. You may be asked to wear a gown during the test. Prior to the test, please be sure to let the technologist know if: You are pregnant or think you may be pregnant. Have any metal medical implants, such as a hip pin or rods in your back. Have had a recent nuclear medicine scan or a barium enema. Have a severely curved spine, have had spinal surgery, or cannot lie on your back. The Procedure During the exam, you will be asked to lie on a table or sit down. Depending on the exam site, your legs may be elevated. The scanner arm will be placed over you and aligned with your body. During the exam, the arm will move back and forth over the scan site. It is very important to remain still and not talk during the time the images are being taken. The technologist will stand or sit near you at all times during the testing. After the Procedure After your scan, you may be asked to wait for your preliminary images to be reviewed. You will not receive your results immediately. Upon leaving the clinic, you may return to your normal routine. Please ask your provider about your test results. T-score Evaluation If you have any questions concerning your exam, please contact the Radiology Department at 712-546-3394. Download this page as a printable PDF