Lower limbs deformities and malalignment: the importance of a new system with 3D capabilities

Congress:

ECR 2020

Poster Number:

C-13840

Type:

Educational Exhibit

Keywords:

Education and training, Education, Digital radiography, Musculoskeletal system, Bones, Anatomy, Musculoskeletal, Not applicable

Authors:

F. Zorzenoni¹, R. N. Chemin², B. C. Carneiro², I. Silva³, J. B. GUIMARAES², F. Duarte³, X. M. G. R. Stump³, A. Ormond³, M. Nico³; ¹São Paulo, São Paulo/BR, ²sao paulo, sp/BR, ³Sao Paulo/BR

DOI:

10.26044/ecr2020/C-13840

DOI-Link:

https://dx.doi.org/10.26044/ecr2020/C-13840

Fig. 1: The basic principles of EOS® imaging system. (A) Overview of equipment during...

Fig. 2: Overview of the equipment. (A) Photograph of the structure of the device. (B,...

Fig. 3: Main concepts involved in EOS® imaging system measurement

Learning objectives

To understand the basic principles of the system, its indications and utilities, demonstrating the main measures and images provided in the evaluation of lower limb alignment, emphasizing its 3D capabiliities.

Background

The EOS equipment and newest challenges in lower limbs evaluation The multidimensional X-ray stereoradiography system, commercially known as EOS®, is a biplanar imaging system that uses the physical principle of the Charpak chamber, allowing to perform the exams with thegreat accuracy, with the advantage of reduced ionizing radiation (Figure 1). Composed of two pairs of detectors, arranged orthogonally, which allows images to be acquired simultaneously in the frontal and sagittal planes, which identically match anatomical landmarks. As the position of anatomical structures is determined on...

Findings and procedure details

Main measures and images provided and it´s clinical applications Many measurements can be taken using the system, with the advantage of an analysis of all spatial planes (Figures 3-5). After setting the reference points and anatomical landmarks needed for the preparation of the main measurements and angulations using the appropriate workstation, we analyzed and summarized the lower limbs examination in a didactic way: 1 - Length of the member Limb length is calculated as the distance between the center of the femoral head and the...

Conclusion

The system provides several advantages over other well-established methods, providing valuable information about the relationship between spine, hip and lower limbs and its consequences.

Personal information and conflict of interest

R. N. Chemin; sao paulo, SP/BR - Author at Fleury B. C. Carneiro; Sao Paulo, SP/BR - Author at Fleury M. Nico; Sao Paulo/BR - Author at Fleury J. B. Guimaraes; SAO PAULO, SP/BR - Author at Fleury F. Duarte; Sao paulo/BR - Author at Fleury X. M. G. R. Stump; Sao Paulo/BR - Author at Fleury A. Ormond; Sao Paulo/BR - Author at Fleury F. O. Zorzenoni; São Paulo, SÃO PAULO/BR - Author at Fleury I. Silva; Sao Paulo/BR - Author at Fleury

References

Illés T, Somoskeöy S. The EOS™ imaging system and its uses in daily orthopaedic practice. International Orthopaedics 2012;36:1325–31. Charpak G. Electronic imaging of ionizing radiation with limited avalanches in gases. Rev Mod Phys 1993;6:591–598. Folinais, D. et al. Ionizing radiation doses during lower limb torsion and anteversion measurements by EOS stereoradiography and computed tomography. European Journal of Radiology, (2014). 83(2), 371–377. Dubousset J, Charpak G, Dorion I, et al. A new 2D and 3D imaging approach to musculoskeletal physiology and pathology with low-dose radiation and...