DEXA Scan: Should You Get One? Everything You Need to Know

What Is a DEXA Scan?

DEXA stands for Dual-Energy X-ray Absorptiometry. It's a quick, painless, non-invasive test that measures bone mineral density (BMD) — essentially, how solid and strong your bones are. It's the gold standard for diagnosing osteopenia (low bone density) and osteoporosis (very low bone density).

The scan typically takes 10–30 minutes, involves no injections, and uses very low levels of radiation — far less than a standard chest X-ray.

Why Does Bone Density Matter After Menopause?

Estrogen plays a critical role in maintaining bone density. When estrogen levels drop at menopause, bone resorption (breakdown) accelerates dramatically. Women can lose 3–5% of bone mass per year in the first few years after menopause — and this loss happens silently, without any symptoms, until a fracture occurs.

A DEXA scan can detect these changes before a fracture happens, giving you the opportunity to take preventive action.

Should You Get a DEXA Scan?

Current Guidelines Recommend Screening If You Are:

A woman aged 65 or older (routine screening)
A postmenopausal woman under 65 with risk factors
A woman who has experienced a fracture from minimal trauma
On long-term steroid therapy or other bone-thinning medications

Key Risk Factors That May Prompt Earlier Screening:

Family history of osteoporosis or hip fracture
Low body weight or small frame
Premature menopause (before age 45)
History of eating disorders
Smoking or heavy alcohol use
Rheumatoid arthritis or inflammatory conditions
Chronic low calcium or Vitamin D intake

Understanding Your Results: The T-Score

Your DEXA results are expressed as a T-score, which compares your bone density to that of a healthy 30-year-old woman at peak bone mass.

T-score above -1.0: Normal bone density
T-score between -1.0 and -2.5: Osteopenia (low bone density — action needed)
T-score below -2.5: Osteoporosis (significant bone loss — treatment typically recommended)

What Happens After the Scan?

Your doctor will discuss your results in the context of your overall fracture risk, using tools like the FRAX calculator, which incorporates additional risk factors beyond bone density alone.

Depending on your results, recommendations may include:

Lifestyle changes (nutrition, exercise, fall prevention)
Calcium and Vitamin D supplementation
Prescription medications (bisphosphonates, denosumab, or HRT)
Repeat DEXA in 1–2 years to monitor changes

How to Request a DEXA Scan

Talk to your primary care physician, gynecologist, or an endocrinologist about your bone health. If you meet the screening criteria, insurance typically covers the cost. If not, many imaging centers offer self-pay options at reasonable rates.

A bone density scan is one of the most valuable tests a postmenopausal woman can have. Knowing where you stand gives you the power to protect your future. Don't wait for a fracture to find out — get the information now, when you can still make a real difference.