Quick answer
EOS produces 2D and 3D images of the entire skeleton in a standing position, with a radiation dose up to 9 times lower than a conventional X-ray. It is indicated for scoliosis assessment, prosthetic planning and study of the lower limbs.
📐 What is it?
EOS produces 2D and 3D images of the entire skeleton in a standing position, with a radiation dose up to 9 times lower than a conventional X-ray. It is indicated for scoliosis assessment, prosthetic planning, and study of the weight-bearing lower limbs.
⚡ EOS at a glance: Key figures
| Criterion | Data |
|---|---|
| Radiation dose | Up to 9 times lower than a conventional X-ray |
| Position | Standing, weight-bearing, unlike CT or MRI which are performed lying down |
| Main indications | Scoliosis, prosthetic planning, weight-bearing lower limbs |
| Examination time | 5 to 10 minutes |
| Prescription | Required, to be sent by e-mail or via Mon AP-HP |
| Coverage | Reimbursed by French national health insurance (Assurance Maladie) |
Data validated by the Radiology B team, Cochin Hospital AP-HP, Paris Cité University.
📋 How to prepare
No preparation. No fasting.
Wear clothing without metal parts (avoid belts and jeans with rivets).
Book directly via Mon AP-HP · Radiology B.
Bring your previous examinations for comparison.
▶️ How does it go?
You stand upright inside the device, in a natural position.
The acquisition is almost instantaneous, a few seconds. Completely painless.
3D models are reconstructed automatically with calculation of angles (Cobb, pelvic parameters...).
✅ After the examination
You can resume your activities immediately, with no restrictions.
Report within 2 to 5 working days.
📄 Patient information leaflet (in French): Download the PDF →
❓ Frequently asked questions
What is the EOS system?
What conditions is EOS indicated for?
Is the EOS examination painful?
✓ Why you can trust this page
Written by the Radiology team at Cochin Hospital AP-HP, Paris Cité University. Medical review by a radiologist of the department. Last updated: July 2026.