What Is a Bone Density (DEXA) Test and Who Needs One?

What is a bone density (BMD) test?

A bone density (BMD) test is a quick, painless bone density scan that measures how much mineral your bones contain, usually at the lower spine and hip. The result, called a T-score, tells your doctor whether your bones are normal, thinning (osteopenia) or already osteoporotic, often years before a fracture happens. At KDRC the scan takes about 10–15 minutes and you stay fully clothed.

BMD stands for bone mineral density. Most centres measure it with a DEXA (dual-energy X-ray absorptiometry) scanner, which passes two very low-dose X-ray beams through the bone and calculates its density. RadiologyInfo.org describes DEXA as the most widely used and most standardised way to diagnose osteoporosis and estimate fracture risk. Our BMD test in Pokhara page covers timings and booking.

Bones are living tissue. Throughout life they constantly break down and rebuild, but from about the mid-thirties the rebuilding slowly falls behind. For women after menopause the loss speeds up sharply because oestrogen, the hormone that protects bone, drops. Osteoporosis has no symptoms until a bone breaks, so a BMD scan is the only reliable way to see that silent loss early, while it can still be slowed with treatment, calcium, vitamin D and exercise.

Who needs a BMD test, and why?

Doctors order a BMD test for two reasons: to screen for osteoporosis before the first fracture, and to monitor treatment once osteoporosis has been diagnosed. It answers a simple question: how strong are your bones right now, and what is your risk of a fracture in the next few years? Most people discover osteoporosis only after they break a wrist, hip or spine bone in a minor fall, and a hip fracture in an older adult is a life-changing event.

• Women after menopause. In Nepal the typical patient is a woman in her fifties or sixties who has never had a scan. Early menopause raises the risk further.
• Adults over 65. Bone loss continues with age in both women and men, so screening becomes worthwhile even without symptoms.
• Anyone with a fracture after a minor fall. A broken bone from a trip or a fall from standing height is a warning sign of fragile bones.
• People on long-term steroids. Steroid tablets such as prednisolone, often used for arthritis or lung disease, weaken bone over months and years.
• People with certain conditions. Thyroid, kidney and malabsorption disorders, low body weight, smoking and a family history of hip fracture all increase risk.
• Men with risk factors. Men over 65, or those with low testosterone, heavy smoking or steroid use, also lose bone and benefit from screening.

Your doctor may also request a scan if you have lost height or developed a stoop. A diet low in milk and dairy and limited sun exposure matter locally too. If several of these apply to you, raise them with your doctor rather than waiting for symptoms. Our guide on osteoporosis screening in Nepal covers who should test and when.

How to prepare for a BMD test

Preparation for a bone density scan is minimal, which is one reason it is such an easy test to fit into a busy week. There are no needles, no dye and no fasting.

The day before and the morning of the scan

You can eat, drink and take your usual medicines. The one exception is calcium supplements: skip them for 24 hours before the scan, because a tablet sitting in the gut can affect the spine reading. Wear clothing without metal fasteners, such as a tracksuit or a kurta without zips, and leave belts and keys behind. Arrive a few minutes early so check-in feels relaxed.

What to tell the staff

Tell the team if you have recently had a barium meal or a CT scan with contrast, because the material can sit in the bowel and interfere with the spine measurement; the team may adjust or reschedule. Always mention if there is any chance you are pregnant.

What affects the cost

BMD test cost depends on the centre and how many sites are scanned (spine, hip or both). KDRC keeps pricing affordable and transparent: call 061-553538 for the current price and the team will quote before you book, with no hidden charges. When comparing centres, also compare what you get: a clear printed report your doctor can act on, and previous results kept on file so next year's scan can be compared with this one.

T-score vs Z-score: reading your BMD result

Two numbers appear on a BMD report. The T-score compares your bone density with that of a healthy young adult and is used to diagnose osteopenia and osteoporosis in postmenopausal women and older men. The Z-score compares you with people of your own age, sex and size, and is mainly used for children, younger adults and premenopausal women, where a T-score can be misleading.

The diagnostic thresholds come from the World Health Organization and are used worldwide, as MedlinePlus explains. A T-score of −1 or higher is normal. Between −1 and −2.5 means low bone density, called osteopenia. At −2.5 or lower the result indicates osteoporosis. A Z-score well below the expected range for your age prompts your doctor to look for another cause of bone loss, such as a hormone or kidney problem.

Your doctor never treats the number alone. They combine it with your age, past fractures, medicines and family history to estimate your overall fracture risk. To understand every line of the report, read what a bone density test tells you, with T-scores explained.

What happens during a BMD scan at KDRC

At KDRC Pokhara, on Shantipath at Amarsingh Chowk, the scan itself takes about 10–15 minutes, and most patients spend around thirty minutes at the centre including check-in. You lie still, fully clothed, on a padded table while a scanner arm passes slowly over your lower spine and hips. Nothing encloses you, there is no injection, and there is no loud noise or claustrophobia.

The radiographer helps you remove metal items such as belts, keys and zips from the waist area, then positions you on the table, sometimes with your legs resting on a padded block to flatten the lower back. You are asked to stay still while the machine takes its readings. Most patients describe the scan as completely uneventful. Afterwards you can go straight back to normal activities.

The images are reviewed and a report with your T-scores is prepared for your doctor. KDRC keeps your previous reports on file, which makes year-to-year comparison straightforward. Because BMD sits alongside KDRC's 192-slice CT, HD ultrasound and lung function testing, your bone density check can be combined with other tests your doctor orders in a single visit.

Is a BMD scan safe, and how often should it be repeated?

A BMD scan is one of the safest imaging tests available. The radiation dose is a small fraction of a standard chest X-ray, among the lowest of any diagnostic imaging test, according to Cleveland Clinic. It is considered safe to repeat at the intervals your doctor recommends. The only routine precaution is pregnancy, which you should always mention beforehand.

Depending on your result and treatment, doctors usually repeat a BMD test every one to two years. People with normal bone density and few risk factors may safely wait longer, while people on osteoporosis treatment need periodic scans to confirm the medicines are working. The exact interval is your doctor's decision. Repeat scans are most meaningful when done on the same type of machine, so the comparison reflects your bones and not a change of equipment.

If your result shows osteopenia or osteoporosis, your doctor will usually discuss calcium and vitamin D, weight-bearing exercise, fall-proofing your home and, for osteoporosis, medicines that slow bone loss. The NHS notes that treatment aims to strengthen bones and prevent fractures. Detected early, osteoporosis is one of the most manageable long-term conditions, and fracture risk drops substantially with treatment.

Common mistakes and myths about bone density testing

• Myth: osteoporosis causes pain, so I would know. Bone loss is silent. The first sign is often a fracture, which is exactly what the scan aims to prevent.
• Myth: only women need a BMD test. Men also develop osteoporosis, especially after 65 or with long-term steroid use.
• Mistake: taking calcium tablets on the morning of the scan. Skip them for 24 hours so the spine reading is accurate.
• Mistake: forgetting to mention a recent barium or contrast study. Leftover material can distort the result and may mean a repeat visit.
• Myth: an osteoporosis result means nothing can be done. A scan result is a starting point for prevention, not a diagnosis of doom.
• Mistake: choosing a centre only on price. The cheapest scan is not a bargain if it cannot be compared with your next one.

Knowing your number is the first step. To book, call 061-553538 or 9856077433, visit our bone density scanning at KDRC, or contact KDRC; the team will confirm the small preparation details when you call.