How is a DEXA Scan performed?

The exam is quite simple and takes only about 15 to 20 minutes. The patient lies on a table while the imager makes passes overhead. Bone density is usually measured at two locations, the hip and the lower spine. A technologist will sit next to the examination table to monitor the procedure at a computer to assure that the imaging is adequate for accurate measurements.

How should I prepare for a DEXA scan?
On the day of the exam, follow your normal diet. Wear loose, comfortable clothing, avoiding garments with metal such as zippers or buttons. There is no other preparation however you may need a referral number.

Why do a DEXA Scan?

DEXA scans are used to diagnose osteoporosis. This condition most often affects post-menopausal women but can also occur in men and younger individuals with certain medical conditions. With osteoporosis there is a gradual loss of bone density that causes bones to become more fragile, often resulting in fractures, even with minimal trauma. If a DEXA scan shows that bone density is low there are now treatment options that can help prevent fractures. Because bone loss can be ongoing, periodic DEXA scans can be used to track bone mineral density over time. Also, once a patient is placed on a treatment regimen for osteoporosis, regular DEXA scans are usually recommended to determine if the treatment is working for a given patient.

Bone density testing is strongly recommended if the patient:

• is post-menopausal
• is a male with medical conditions associated with osteoporosis
• is using steroids over a prolonged period of time
• is using excessive thyroid hormones
• is using certain anti-convulsants
• has a family history of osteoporosis
• has excessive alcohol or caffeine consumption
• is a smoker
• has Type 1 diabetes, liver disease, or kidney disease
• has had a vertebral fracture, hip fracture, or fracture after only minor trauma
• has hyperthyroidism

How will I learn about the results?

Once the density is calculated, it is reviewed by a radiologist and is compared to standards. The results are then sent promptly to your doctor who will discuss them with you, and discuss treatment options if necessary.