"The pediatrician ordered a bone-age x-ray for my child — where do I go, what does it cost, is it safe?" This guide walks through every step under 2026 conditions in Turkey.
What is a bone-age x-ray?
Bone age is the biological maturation age estimated from a hand-wrist AP (anterior-posterior) x-ray by an experienced radiologist using the Greulich-Pyle Atlas (1959) or Tanner-Whitehouse 2/3 scoring.
Structures examined:
- Carpal bones (8 wrist bones) — especially diagnostic in children under 5
- Distal radius and ulna epiphyses — primary scoring zone 5-13 yrs
- Metacarpal and phalangeal epiphyses — adolescent scoring
When is it ordered?
- Short or tall stature (below p3 or above p97)
- Early or delayed puberty evaluation
- Adult-height projection (Bayley-Pinneau, Khamis-Roche)
- Endocrine pathology suspicion (GH deficiency, hypothyroidism, CAH)
- Athlete selection and bio-banding (Turkish sports federations now use it)
- Forensic age determination (immigrant children, adoption — special ethics rules apply)
Procedure step-by-step
- Family prep: Insurance referral or out-of-pocket, appointment (some private clinics accept walk-ins)
- Positioning: Left hand, palm down, fingers together, centered on the beam
- Exposure: 30 seconds — only requires the child to hold still
- Reading: Pediatric radiologist or general radiologist
- Report: 1-3 business days (same day in urgent cases)
Why the left hand?
Left hand is the standard (Greulich-Pyle 1959 protocol). Reason: most people are right-dominant, so the right hand suffers more sports/injury trauma. The left provides cleaner baseline anatomy. If the left has a fracture, the right is used and noted in the report.
Radiation dose — is it safe?
On modern digital x-ray equipment, a hand-wrist AP image is:
- 0.0001 mSv (millisievert) — under 100 microsieverts
- For comparison: chest x-ray ≈ 0.1 mSv, CT scan ≈ 7 mSv
- For comparison: an 8-hour flight delivers ≈ 0.04 mSv (cosmic background)
So a hand-wrist x-ray delivers about as much radiation as 5-10 minutes of flight. With a lead apron protecting the thyroid and gonads, additional shielding is in place.
Conclusion: When done 1-2 times a year, the cancer-risk contribution is negligible.
Turkey 2026 cost ranges
| Setting | Estimated cost (2026) | Time |
|---|---|---|
| Public (SGK-covered) | Free with referral | 1-2 week wait |
| Private outpatient clinic | 400-700 TL ($12-22) | Same day |
| Private hospital (pediatric radiology) | 800-1.500 TL ($25-45) | 1-3 days |
| AI-assisted reading (BoneXpert) | Used in Europe, pilot in Turkey | — |
To use SGK (Turkish public insurance), you need a pediatrician referral. Pediatric endocrinology, orthopedics, or general pediatrics can refer.
How to interpret a report
A typical report format:
Chronological age: 12 yr 4 mo Bone age (Greulich-Pyle Atlas): 13 yr 6 mo Standard deviation: +1.2 SD (advanced for age) Tanner-Whitehouse RUS score: 510 (BA = 13.5) Comment: Bone age is approximately 14 months ahead of chronological age.
SD ranges:
- ±1 SD: Normal range
- +1 to +2 SD: Mild advancement (constitutional advance)
- −1 to −2 SD: Mild delay (constitutional delay)
- Beyond ±2 SD: Pathology likely — endocrinology consult required
AI bone-age reading — the future is here
Manual reading depends on the radiologist; inter-rater agreement is 95% (±0.5 yr
spread). AI systems (BoneXpert AHP, DeepASA, Visiana):
- Mean absolute error (MAE): ±0.4 yr
- Time: 3-5 seconds
- Consistency: 100% (identical image, identical result)
- FDA Class II approval (BoneXpert, 2009)
- CE-MDR approval (Europe, clinical use)
Turkey has no formally approved AI yet, but prototypes are being tested. You can preview our Bone-Age AI tool (research preview, not for clinical use).
FAQ
My child is 4 — too young?
Age 4 is the lower bound. The Greulich-Pyle Atlas covers 2-19 yrs. Under 4, knee or foot x-rays can be alternatives.
Can a pregnant mother accompany the child?
No — radiologists won't allow pregnant escorts. A father/grandparent can accompany. With a lead apron and 1.5 m distance, exposure is very low.
Does a bone-age x-ray give a definitive adult height?
No — methods like Bayley-Pinneau or Roche-Wainer-Thissen produce a projection. Bayley-Pinneau standard error: ±2.6 cm in girls, ±3.2 cm in boys (1 SD).
Who should read it?
Ideally a pediatric radiologist or pediatric endocrinologist. General radiologists can read it, but pediatric experience matters.
Bottom line
Bone-age x-rays are safe, fast, and pivotal for clinical decisions. As of 2026 in Turkey, expect 800-1.500 TL in private hospitals or free via SGK. With Premium, feed the result into our Bayley-Pinneau calculator for an adult-height projection. For an AI-assisted pre-read, try the research preview: Bone-Age AI.