Frequently Asked Questions

Bone age is the biological maturity of the skeleton, assessed from the ossification centers on a hand-wrist radiograph. It is used to evaluate growth disorders, endocrine follow-up, and forensic age estimation.

A deep-learning model analyzes the hand-wrist radiograph you upload. It first classifies the image as under/over 18, then estimates bone age and gender. The whole process takes seconds.

JPG, JPEG, PNG, BMP images and DICOM (.dcm) files are supported. For best results, upload a clear, correctly positioned PA hand-wrist radiograph.

No. This is a clinical decision-support tool. The result is not a standalone diagnosis and must be reviewed by a physician or radiology specialist.

We publish every model's internal validation score as a table on the Methodology page: the gate model that separates under/over 18 scores 96.3% accuracy (AUC 0.994), the under-18 band experts sit at 6.9-11.1 months mean absolute error, and the over-18 model errs at year scale (3.9 years). That last figure is a physiological limit, not a software flaw: growth plates close around 18-19 years, after which the radiograph carries almost no age-discriminating signal. Internal validation always flatters a model, so we recommend institutions run an acceptance test on their own samples.

The image, result and audit record are stored securely in the database and are accessible only to authorized administrators. Model files are never served publicly. See the Privacy page.

No. Membership is required. When you register for free, you receive one trial analysis.

A free account includes one lifetime trial. After that, switch to a monthly or yearly subscription for unlimited use. See Pricing.

Pick your plan on the Pricing page ($20/month, $200/year) and complete the payment with your card. Your account is upgraded to premium as soon as the payment is confirmed — no waiting.

Yes. You are charged automatically every month on the monthly plan, or every year on the yearly plan. You can stop it yourself at any time with the 'Cancel subscription' button on the Subscription page — no charge after cancellation, and you keep access until the end of the period you already paid for.

Yes. Use 'Print Result' on the result screen to print or save as PDF.

Yes, and we value it highly. On the result screen you can tell us whether you were satisfied, and enter the patient's real age and gender if you know them. If you learn the real age later, you can add it from the 'My Analyses' page. This is what lets us measure and improve the model's accuracy.