Bone Age — Guided Hand/Wrist Estimator

Read the findings off the left hand/wrist film: a quick bracket, then the fine details, to estimate skeletal age. No images are uploaded — you stay the reader.

Step 1. Patient

Step 2. Gross stage

Pick the one that best describes the overall film. This brackets the age and brings up the relevant detailed findings.

Step 3. Fine findings

Mark each finding to hone in. Ages shown are the typical age of that finding for the selected sex.

Pick a gross stage first.

Estimated bone age

— bone age
Work through Steps 2–3 to estimate the skeletal age.
Report line will appear here.
Method. A landmark-driven estimate built from the documented sequence and timing of hand/wrist skeletal maturation — ossification-center appearance, the thumb adductor sesamoid, epiphyseal capping, and the epiphyseal-fusion sequence (distal → middle → proximal phalanges → metacarpals → distal ulna → distal radius). The fine findings narrow the estimate between adjacent events. This is an aid to skeletal-age reasoning, not a reproduction of the Greulich-Pyle atlas plates — final assignment should still be confirmed against the atlas you have on hand.
Reference ages are approximate and sex-specific (appearance ages after Greulich-Pyle / standard skeletal-maturation tables; fusion ages from forensic age-estimation literature). The 6–10 year window has fewer events, so resolution there is intentionally wider.
±2 SD bands for the normal-range readout are approximate (≈ 7–10 months in early childhood widening to ≈ 12–15 months in adolescence).
Reference only — not a substitute for radiologist interpretation. Bone age has substantial individual and ethnic variation.