A patient came in last year after a small slip on her front steps. Nothing dramatic. She caught herself, barely fell. But her wrist broke anyway. She was in her early sixties, active, ate well, and assumed her bones were fine. They weren't. A bone density DEXA scan told us what the fall already had: she had osteoporosis, and we'd missed the window to catch it quietly.
I think about her often, because her story is the one I'm trying to prevent in every patient I see. Bone loss is silent. It doesn't ache. It doesn't show up on a regular blood test. The first symptom, for too many people, is a broken bone. A DEXA scan is how we find the problem before that happens.
What is a bone density DEXA scan?
A DEXA scan is a quick, painless imaging test that measures how strong your bones are. DEXA stands for dual-energy X-ray absorptiometry, which is a mouthful for what is really a low-dose X-ray of your hip and spine. You lie on a padded table for about ten or fifteen minutes. There's no needle, no dye, nothing to swallow. The radiation is a fraction of a standard chest X-ray.
The scan gives us two numbers. The T-score compares your bone density to a healthy young adult, and it's the one we use to diagnose osteoporosis. The Z-score compares you to others your own age, which helps flag when something unusual is driving bone loss.
How do I know if I need a bone density test?
Most people should have a baseline DEXA scan around the time bone loss tends to accelerate, though the exact timing depends on your risk. In my practice, I look at the whole picture, not just a birthday on a chart.
You may be a candidate sooner if you have certain risk factors:
- Going through or past menopause, when estrogen drops and bone loss speeds up
- A parent who broke a hip
- Long-term steroid use, smoking, or heavy drinking
- A small or thin frame
- A bone that broke from a minor fall
- Low vitamin D, which your body needs to absorb calcium
Men get osteoporosis too. It's underdiagnosed in men precisely because we tend to think of it as a women's condition. If you've got the risk factors, the scan matters regardless of gender.
What do my DEXA scan results mean?
Your T-score sorts you into one of three ranges, and I always go over yours with you rather than letting a number sit in a portal. A score of -1.0 or higher is normal. Between -1.0 and -2.5 is osteopenia, meaning your bones are thinner than ideal but not yet in the danger zone. A score of -2.5 or lower means osteoporosis.
Here's the part I want patients to hear: osteopenia is good news, not bad. It's an early warning, and early is exactly where we want to be. It usually means we can protect your bones with sensible steps rather than scrambling after a fracture.
What happens after the scan?
What we do next depends entirely on your results and your risk, and there's a real range of options. For some patients, the answer is mostly lifestyle: weight-bearing exercise, enough calcium and vitamin D, quitting smoking, easing up on alcohol. Strength training does more for bones than most people expect.
For others, especially those with osteoporosis or a high fracture risk, we talk about medication that slows bone loss or helps rebuild bone. I don't reach for a prescription reflexively. We weigh your numbers, your history, and your preferences together, and I make sure you understand why before we start anything.
Then we set a plan to recheck. Bone changes slowly, so we usually wait a couple of years between scans to see whether what we're doing is working.
Why catching this early matters in Los Angeles
A broken hip in your seventies or eighties is not a minor event. It can mean surgery, a long recovery, and a real loss of independence. That's the outcome I'm working backward from with every bone density conversation I have.
One advantage of how I practice here in Los Angeles is time. I'm not rushing you through a seven-minute visit. We can actually sit down, look at your risk, decide whether a scan makes sense now, and walk through the results together when they come back. When you need imaging or a specialist, I coordinate it directly so nothing slips through the cracks.
If you're wondering whether it's time for your first bone density scan, or you've got results you don't fully understand, I'd genuinely like to help you sort it out. Reach out to the practice and let's talk it through. Your bones do quiet work for a lifetime, and they're worth paying attention to before they ever give you a reason to.