If your doctor has recommended a bone density scan, also called a DEXA scan (Dual-Energy X-ray Absorptiometry), you’re probably wondering what it actually checks and whether you really need one. A DEXA scan is a simple, painless imaging test that measures how strong and dense your bones are, helping doctors catch bone loss early — often before a fracture happens. Here’s everything you need to know about this test and who should be getting it.
What Is a DEXA Scan?
A DEXA scan uses a very low dose of X-rays — much lower than a regular X-ray — to measure bone mineral density, usually at the hip and spine. These are the areas most prone to fractures as bones weaken with age. The scan compares your bone density to that of a healthy young adult and gives you a score (called a T-score), which tells your doctor whether your bones are normal, showing early thinning (osteopenia), or significantly weakened (osteoporosis). It’s one of several imaging tools used alongside radiology services to build a complete picture of your health.
How Is the Test Done?
The procedure is quick, usually done in 10 to 20 minutes, and requires no injections, no fasting, and no special preparation. You simply lie down on a table while a scanning arm passes over your body. There’s no discomfort involved, and you can go about your day normally right after the scan.
Why Does Bone Density Matter?
Bones naturally lose density as we age, but this process can speed up due to hormonal changes, certain medications, low calcium or vitamin D intake, or a sedentary lifestyle. The tricky part is that bone loss doesn’t cause pain or symptoms until a fracture actually happens — which is why many people don’t realize their bones have weakened until they suffer a fall or a break. A DEXA scan catches this early, when it’s still manageable through diet, lifestyle changes, or medication.
Who Should Get a DEXA Scan?
You should consider a bone density scan if you fall into any of these categories:
- Women above 65 and men above 70, as a routine screening
- Postmenopausal women, since estrogen decline speeds up bone loss
- Anyone with a family history of osteoporosis or hip fractures
- People who’ve had a fracture from a minor fall or injury
- Those on long-term steroid medication
- People with conditions like rheumatoid arthritis, thyroid disorders, or chronic kidney disease
- Individuals with a low body weight or history of smoking and heavy alcohol use
- Anyone with a diet consistently low in calcium and vitamin D
If you’re unsure whether you fall into a risk category, it’s worth asking your doctor rather than waiting for symptoms that may never show up until it’s too late.
What Do the Results Mean?
Your DEXA scan report will show a T-score:
- Above -1.0 — Normal bone density
- -1.0 to -2.5 — Osteopenia (early bone thinning)
- Below -2.5 — Osteoporosis
Depending on where you fall, your doctor may recommend calcium and vitamin D supplementation, weight-bearing exercise, medication, or simply a follow-up scan after a year or two to track changes.
How Often Should You Get One?
For most people at normal risk, a DEXA scan every 2 years is standard once screening begins. If you’ve already been diagnosed with osteopenia or osteoporosis, your doctor may recommend more frequent monitoring to track how well treatment is working.
Book Your DEXA Scan at Prakash Pathology & Radiology
If you fall into any of the risk categories above, or your doctor has advised a bone density check, Prakash Pathology & Radiology in Varanasi offers accurate, fast radiology diagnostics with experienced radiologists reviewing every scan. You can book an appointment online, browse our full test menu, or contact us directly for more details.
FAQs
Is a DEXA scan painful? No, it’s completely painless. You simply lie still while the machine scans you.
Does a DEXA scan involve radiation? Yes, but the radiation dose is extremely low — far less than a standard chest X-ray.
Do I need to fast before a DEXA scan? No fasting or special preparation is required.
Can young people need a DEXA scan? Yes, if there’s a family history of osteoporosis, long-term steroid use, or an existing medical condition affecting bone health.
How is a DEXA scan different from a regular X-ray? A regular X-ray shows bone structure and fractures, while a DEXA scan specifically measures bone density to detect thinning before a fracture occurs.
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Think you might need a bone density check? Book an appointment with Prakash Pathology & Radiology in Varanasi today.