EOS® system

EOS® system

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The EOS system provides low dose, full body, stereo-radiographic images of your patient in a functional position. The EOS system is designed around a vertically traveling arm supporting two image acquisition systems mounted at right angles. Each acquisition system is composed of an X-ray tube and a linear detector.


This unique biplanar design and linear, vertical scanning technique acquires frontal and lateral images of your patient simultaneously in either a standing or seated position with the EOS Radiolucent Chair.

Clinical benefits

  • Comprehend compensation mechanisms between the spine, hip and knee thanks to full body, weight-bearing images
  • Calculate precise 2D and 3D measurements, free from magnification and stitching bias
  • Improved diagnostics due to high image quality and over 65,000 grey levels for excellent contrast


Dose reduction

  • Patient’s radiation dose decreased by 50% compared to a DR system1and 85% compared to a CR system2
  • Substitution of specific CT exams with an EOS exam to reduce the patient’s radiation dose by 95%3
  • Micro Dose protocol for a full spine exam (frontal and lateral) at a dose that’s equivalent to only a week’s worth of natural radiation4


Facility-wide efficiency

  • Capture frontal and lateral, full body images in less than 20 seconds for adults and 15 seconds for children
  • Complete an exam in under 4 minutes, even for complex spine or full body1
  • Maximize patient throughput with up to 120 complex exams per day9
  • Facilitate the process to image disabled patients with the EOS Radiolucent Chair




  1. Comparison of radiation dose, workflow, patient comfort and financial break-even of standard digital radiography and a novel biplanar low-dose X-ray system for upright full-length lower limb and whole spine radiography. Dietrich TJ et al. Skeletal Radiol. 2013.
  2. Diagnostic imaging of Spinal deformities: Reducing Patients Radiation Dose With a New Slot-Scanning X-ray Imager. Deschenes S, Charron G, Beaudoin G,Labelle H, Dubois J, Miron M, Parent S. Spine April 2010, 35 (9): 989. .
  3. Ionizing radiation doses during lower limb torsion and anteversion measurements by EOS stereoradiography and computed tomography. Delin C et al. Eur J Radiol. 2014
  4. EOS microdose protocol for the radiological follow-up of adolescent idiopathic scoliosis. Ilharreborde B. et al. Eur Spine J. 2015
  5. Preoperative three-dimensional planning of total hip arthroplasty based on biplanar low-dose radiographs: accuracy and reproducibility for a set of 31 patients. Mainard, D et al. Communication at ISTA 2014.
  6. The EOS imaging system and its uses in daily orthopaedic practice. Illes T, Somoskeoy S. Int Orthop2012 Feb 28.
  7. Accuracy of Digital Preoperative Templating in 100 Consecutive Uncemented Total Hip Arthroplasties, Journal of Arthroplasty, 2013-02-01, R.Shaarani & al
  8. What proportion of patients report long-term pain after total hip or knee replacement for osteoarthritis? A systematic review of prospective studies in unselected patients. Beswick, A. D., V. Wylde, R. Gooberman-Hill, A. Blom and P. Dieppe (2012). BMJ Open.
  9. Meijjo Hospital, Nagoya, Japan
rue Mercoeur, 10
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