EOS System - New Imaging 2D and 3D for Musculo-Skeletal Physiology and Pathology with low radiation dose and standing position

Very precise combined work between multidisciplinary partners (radiation engineers in physics, engineers in biomecanics, medical radiologists and orthopedic pediatric surgeons) lead to the concept and development of a new low dose radiation device named EOS. This device allows 3 main advantages : - Thanks to the gaseous detectors for X Rays designed by Georges CHARPAK (Nobel Price 1992) the reduction of doses necessary to obtain a good image of the skeletal system is important : 8 to 10 times less for 2D imaging, and 800 to 1000 times less for 3D reconstruction from CT scan cuts. - The accuracy of 3D reconstruction obtained is as good as a 3D reconstruction from CT scan cuts. -In addition, the patient gets its imaging in standing functional position thanks to the X-rays obtained from head to feet simultaneously AP and lateral. This is a big advantage compared to CT scan used only in lying position. - From this simultaneous AP and lateral X-rays of the whole body thanks to the 3D bone external envelop technique, the engineers in biomechanics allowed to obtain 3D reconstruction at every level of osteo-articular system and especially for spine in standing position within an acceptable period of time (15 to 30 minutes). EOS (in spite of the evolution of standing MRI) allows more precise bone reconstruction in orthopedics especially at the level of spine, pelvis and lower limbs, giving new consideration for physiology, physio-pathology and therapeutics.