Digital X-Ray of Bone Age Test

If your child’s doctor has recommended a bone age test, you likely have questions about what it involves, why it is needed, and whether it is safe. This single digital X-ray of your child’s left hand and wrist helps doctors assess skeletal maturity, identify growth delays or early puberty, and guide treatment. It is quick, low-radiation, and widely available in Bangladesh. Here is a parent-friendly walkthrough of everything you need to know.

What Is a Bone Age Test and Why Is It Done?

Bone age (also called skeletal age) reflects how mature a child’s bones are compared to their chronological age. The test compares an X-ray of the left hand and wrist — the most commonly used site — against standardized atlases such as the Greulich-Pyle method. This tells doctors whether a child’s skeleton is developing at an expected rate, delayed, or advanced.

Common reasons a pediatrician or pediatric endocrinologist may order this test include:

• Concerns about short or tall stature
• Early (precocious) or delayed puberty
• Monitoring growth hormone therapy
• Evaluating certain endocrine disorders (e.g., hypothyroidism, growth hormone deficiency)
• Assessing syndromes that affect growth

The test is a tool — not a diagnosis. It gives a snapshot of skeletal maturity that must be interpreted alongside other tests and a clinical exam.

How Is the Digital X-Ray Performed?

The procedure is straightforward and takes about 5 minutes. Your child will be asked to sit and place their left hand and wrist flat on the X-ray cassette, palm down, with fingers slightly spread. A single digital X-ray image is taken, often including part of the forearm. No special preparation is needed. Remove any metal jewellery, watches, or accessories from the hand and wrist area.

The technician may use a lead apron to shield the rest of the child’s body. Because it is a digital X-ray, the image is available immediately for the radiologist to review. Your child will not feel anything — the process is painless.

Is the Digital X-Ray Safe for Children?

This is the most common concern parents have. Modern digital X-rays use significantly less radiation than older film-based X-rays. For a bone age test, the radiation exposure is very low — comparable to the natural background radiation you receive over a few days. The benefit of obtaining accurate information about growth and development far outweighs the minimal risk.

Lead shielding is routinely used to protect the rest of the body. If your daughter is pregnant or there is any possibility of pregnancy, inform the technician and doctor beforehand so precautions can be taken. Overall, a single bone age digital X-ray is considered safe for children of all ages.

How Are the Results Interpreted?

The digital X-ray is examined by a radiologist and sometimes by a pediatric endocrinologist. They compare the appearance of growth plates (epiphyses) and ossification centers in the wrist and hand bones against established standards — primarily the Greulich-Pyle atlas or the more detailed Tanner-Whitehouse method.

The result is reported as a bone age, for example: “Bone age estimate: 8 years (chronological age 10 years)”. This indicates a delay in skeletal maturity. The report may also include a margin of error (usually ± 6 months to 1 year). The bone age is then compared to your child’s actual age to determine if skeletal development is normal, delayed, or advanced.

What Does Delayed or Advanced Bone Age Mean?

A delayed bone age (skeletal age less than chronological age) can be associated with conditions such as growth hormone deficiency, hypothyroidism, constitutional growth delay (a normal variation), or chronic illness. An advanced bone age (skeletal age greater than chronological age) may be linked to early (precocious) puberty, obesity, hyperthyroidism, or certain genetic syndromes.

Important: These are possibilities, not certainties. The bone age test is one piece of a larger puzzle. A pediatric endocrinologist must correlate the result with your child’s growth chart, family history, physical exam, and additional lab tests before making a diagnosis or suggesting treatment. Do not draw conclusions on your own.

Cost of Digital X-Ray Bone Age Test in Bangladesh

The cost of a digital X-ray bone age test in Bangladesh varies by city, diagnostic center, and whether a radiologist’s report is included. The ranges below are approximate (2025) and should be confirmed with the facility. Many labs offer the test both as an image-only service and with a full written report.

Note: Prices change over time. Always call the center to confirm the current rate and what is included. Some hospitals may bundle the test with a consultation.

What to Do After Getting the Results?

Once you receive the bone age report, share it with the doctor who ordered the test — ideally a pediatric endocrinologist in Dhaka or a specialist in your area. Do not try to interpret the numbers yourself. The bone age must be seen alongside growth charts, blood tests, and your child’s medical history.

If the bone age is normal for your child’s age, the doctor may advise continued monitoring. If there is a significant difference, further testing (e.g., growth hormone stimulation tests, thyroid function, MRI of the pituitary gland) may be recommended. The bone age test is a starting point for understanding your child’s growth — it opens the door to the right next steps.

Find an Endocrinologist in Your Division

If your child needs a bone age test or follow-up, consulting a qualified pediatric endocrinologist is essential. Here are specialists listed by division in Bangladesh:

Note: For very young children (under 1 year), a knee X-ray may sometimes be used instead of the hand. Your doctor will advise the appropriate technique for your child.

Find doctors by division in Bangladesh

Use the table below to find verified doctors across all eight divisions of Bangladesh.

Frequently Asked Questions

Does the bone age test hurt?

No, the test is completely painless. Your child simply places their left hand and wrist on the X-ray plate for a few seconds while the image is taken. There are no needles, injections, or physical discomfort involved.

Is any special preparation needed before the test?

No special preparation like fasting or medication changes is required. However, you should remove any jewellery, watches, or metal objects from your child’s left hand and wrist before the X-ray. Loose clothing that allows easy access to the hand and forearm is helpful.

What if my child has a cast or injury on the left hand?

If the left hand is injured or in a cast, the X-ray cannot be taken on that side. In such cases, your doctor may recommend using the right hand instead, or delay the test until the cast is removed. Always inform the radiologist and your doctor about any injury beforehand.

How long does it take to get the results?

The X-ray itself takes only a few minutes. The radiologist then reviews the image and compares it with standard bone age atlases. Results are typically available within a few hours to the same day, though your doctor may discuss them during a follow-up appointment.

Can the bone age test be repeated, and how often is it done?

Yes, the test can be repeated to monitor growth over time. The frequency depends on your child’s condition — for example, every 6 to 12 months is common when tracking growth hormone therapy or puberty progression. Your endocrinologist will advise the appropriate interval based on your child’s needs.

Sources

The following sources are from international journals, government health agencies, or recognized medical organizations:

• Bone Age Assessment: A Review of Methods and Clinical Applications (pubmed.ncbi.nlm.nih.gov)
• Bone Age X-Ray (Skeletal Survey) – Mayo Clinic (mayoclinic.org)
• World Health Organization — Digital X-Ray of Bone Age Test (who.int)
• MedlinePlus — Digital X-Ray of Bone Age Test (medlineplus.gov)
• CDC — Digital X-Ray of Bone Age Test (cdc.gov)
• NHS — Digital X-Ray of Bone Age Test (nhs.uk)