Bone Density FAQ's
Q. How is the procedure conducted?
A. Bone Density is a fast, painless, non-invasive test, which is completed in approximately 15 minutes. During a Bone Density exam, the patient lies fully clothed on a padded table. Like other diagnostic tests, Bone Density uses X-rays; however, the amount of radiation required is less than a mammogram. During a Bone Density, Bone Mineral Density (BMD) is measured at both the spine and hip since bone mineralization is not uniform throughout your body. Therefore, while some skeletal sites may be normal, others may be osteoporotic and prone to fractures. Such discordance between the BMD of the spine and hip is common in one third of patients, making it important to measure both sites.
Q. How do I prepare for the exam?
A. Preparation for this appointment is minimal. Please wear comfortable clothing with no metal zippers, buttons or buckles of any kind. You will be asked to remove any jewelry or metal items, such as watches or glasses, before the exam. A brief medical history may be taken; this may include a family history of osteoporosis, history of medications taken, fracture and menopausal history. Let us know if you are pregnant, or think you may be.
Q. What do the test results mean?
A. Your BMD is directly related to fracture risk. The higher the BMD, the lower your risk for fracture. Bone density results are compared to individuals in your age group and reported as a “Z score.” A comparison is also made to normal young individuals and is described as a “T score.”
Osteoporosis is defined as a BMD T score of -2.5 and below, even if you have not had fractures, and is normally an indication for treatment. A normal T score is -1 or greater. Osteopenia (low bone mineral density, but not yet osteoporotic) is defined as a T score which lies between -1 and -2.5. If you have low bone mass, your physician can discuss with you other risk factors of osteoporosis and determine whether or not you should consider treatment to prevent osteoporosis.
Q. Who interprets the results of my Bone Density?
A. A radiologist will interpret your scan results. A detailed report of your bone mineral density assessment will be sent directly to your physician with recommendations for the appropriate management.
