What is Bone Density Scan (DEXA)?

Dual-Energy X-ray Absorptiometry

Quick Answer

A Bone Density Scan, also known as DEXA, is a medical test that measures the density of bones to assess their strength and risk of fractures. It uses low-dose X-rays to produce images of bones, primarily in the hip and spine.

Overview

A Bone Density Scan, or DEXA, is a diagnostic imaging test that helps determine the strength and density of bones. It works by using a small amount of radiation to create detailed images of bones, allowing healthcare providers to see how strong or weak they are. This test is particularly important for diagnosing conditions like osteoporosis, which can lead to fractures and other complications if not identified early. During the scan, a patient lies on a table while a machine passes over their body, focusing on areas like the spine and hips. The process is quick, typically taking about 10 to 30 minutes, and is painless. For example, a postmenopausal woman may undergo a DEXA scan to check her bone density, as she is at a higher risk for osteoporosis due to hormonal changes. Understanding bone density is crucial for preventing fractures, especially in older adults. By identifying individuals with low bone density, doctors can recommend treatments or lifestyle changes to help strengthen bones. This test plays a vital role in diagnostics and imaging, providing essential information that can influence a patient's overall health and treatment plan.

Frequently Asked Questions

How often should I get a Bone Density Scan?

The frequency of Bone Density Scans depends on individual risk factors such as age, family history, and previous results. Generally, women over 65 and men over 70 should have a scan every two years, but your doctor may recommend a different schedule based on your health.

Is a Bone Density Scan safe?

Yes, a Bone Density Scan is considered very safe. The amount of radiation exposure is minimal, much lower than that of a standard chest X-ray, and the benefits of detecting bone density issues far outweigh the risks.

What do the results of a Bone Density Scan mean?

Results from a Bone Density Scan are typically reported as T-scores, which compare your bone density to that of a healthy young adult. A lower score indicates lower bone density and a higher risk of fractures, while a higher score suggests healthier bones.