The use of a photogrammetric method for the three-dimensional evaluation of spinal correction in scoliosis

Berthonnaud, Éric; Papin, Patrice; Deceuninck, J.; Hilmi, R.; Bernard, J.-C.; Dimnet, J.

doi:10.1007/s00264-015-3080-4

Cited by 5 publications

(5 citation statements)

References 13 publications

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“…These authors also showed that routine 2D measurements of deformities underestimate the amount of Cobb angle because of the axial plane rotation. These techniques have the advantage that a software calculates a 3D reconstruction of the spine based on radiographs of the standing patient [20,21].…”

Section: Discussionmentioning

confidence: 99%

Comparison of two- and three-dimensional measurement of the Cobb angle in scoliosis

Lechner

Putzer

Dammerer

et al. 2016

International Orthopaedics (SICOT)

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Purpose The Cobb angle as an objective measure is used to determine the progression of deformity, and is the basis in the planning of conservative and surgical treatment. However, studies have shown that the Cobb angle has two limitations: an inter-and intraobserver variability of the measurement is approximately 3-5 degrees, and high variability regarding the definition of the end vertebra. Scoliosis is a three-dimensional (3D) pathology, and 3D pathologies cannot be completely assessed by two-dimensional (2D) methods, like 2D radiography. The objective of this study was to determine the intraobserver and interobserver reliability of end vertebra definition and Cobb angle measurement using X-rays and 3D computer tomography (CT) reconstructions in scoliotic spines. Methods To assess interoberver variation the Cobb angle and the end vertebra were assessed by five observers in 55 patients using X-rays and 3D CT reconstructions. Definition of end vertebra and measurement of the Cobb angle was repeated two times with a three-week interval. Intraclass correlation coefficients (ICC) were used to determine the interobserver and intraobserver reliabilities. 95% prediction limits were provided for measurement errors. Results Intraclass correlation coefficient (ICC) showed excellent reliability for both methods. The measured Cobb angle was on average 9.2 degrees larger in the 3D CT group (72.8°, range 30-144) than on 2D radiography (63.6°, range 24-152). Conclusions In scoliosis treatment it is very essential to determine the curve magnitude, which is larger in a 3D measurement compared to 2D radiography.

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Section: Discussionmentioning

confidence: 99%

Comparison of two- and three-dimensional measurement of the Cobb angle in scoliosis

Lechner

Putzer

Dammerer

et al. 2016

International Orthopaedics (SICOT)

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“…The emergence of 3D analysis to evaluate scoliosis [6, 7, 13, 16–21] has allowed a more comprehensive and more correct approach, thanks to the top view.…”

Section: Discussionmentioning

confidence: 99%

“…The relation was based on the use of epipolar planes. The 3D spinal curves were projected on fixed plane, and regional planes were detected along this rough spinal curve [6, 7]. Three or four planes were then identified.…”

Section: Methodsmentioning

confidence: 99%

“…The 3D spinal curve is uniquely flexed along the plane regions. Biplanar radiographic examination with simultaneous exposures (frontal and sagittal in the EOS system), coupled with photogrammetric reconstructions, may be used for reconstructing the 3D spinal curve [7]. The photogrammetric technique reconstructs points in space from their two images in projection planes.…”

Section: Introductionmentioning

confidence: 99%

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Three-dimensional reconstructions of Lenke 1A curves

et al. 2018

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BackgroundScoliosis is a 3D deformity that can be reconstructed through 2D antero-posterior and lateral radiographs, which provide an upper view of the deformed spine as well as regional planes matching all vertebrae of elective plane for each curve. The objective of this study is to explore whether all idiopathic scoliosis classified Lenke 1A have the same 3D representation made with regional planes.MethodsAll patients treated for idiopathic thoracic scoliosis during the growth period and classified Lenke 1A were included in this study conducted in the pediatric spinal orthopedic department of Centre des Massues. A photogrammetric technique was used to obtain a 3D reconstruction, from regional planes identified on radiographs made with the EOS system. Three regional planes are usually identified in asymptomatic spines: lumbar, dorsal, and cervical—none of them presenting rotation. In the studied group, the number of planes, the rotation, and the limit vertebrae of each plane were looked for.ResultsSixty-three patients were included (47 girls and 16 boys, mean age 11.3 years). The Cobb angle was meanly 36.5°. The scoliosis was reconstructed with three regional planes (57%) or four ones (43%, with the thoracic plane divided into two planes). Maximal rotation was found in the thoracic plane, especially when scoliosis was represented with four regional planes. The transition between planes 2 and 3 was mainly located between the fourth and sixth dorsal vertebrae.ConclusionThe use of an arbitrary regional plane representation of a 3D shape leads to conclude that there are two types of Lenke 1A scoliosis, which should be taken into account for designing the brace.

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“…Radiographic technique was the main technique for acquiring the EAEP. Based on the 3D reconstruction of the spine or spinal curve, the EAEP could be determined by a triangle plane formed by the connecting lines between the centroids of two end and apical vertebrae of a specific curve (or the end limits and apex of a curve) [7,11,10,33,34].…”

Section: Techniques For Obtaining Eaepmentioning

confidence: 99%

Assessment of Maximum Spinal Deformity in Scoliosis: A Literature Review

Wong

2020

J. Med. Biol. Eng.

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The importance of three-dimensional (3D) assessment of scoliosis has been increasingly recognized. The plane of maximum curvature (PMC), end-apical-end vertebrae plane (EAEP) and best-fit plane (BFP) could assist in reviewing the 3D features of spinal deformities. However, some questions related to PMC, EAEP & BFP have not been thoroughly studied such as (1) any potential differences among them; (2) techniques for obtaining them; (3) and their applications in scoliosis. Therefore, this paper aimed to systematically review the relevant articles to provide useful information for exploring the applications of these 3D descriptors in the clinical assessment and management of scoliosis. This study revealed that BFP could be superior to EAEP and PMC orderly in describing 3D features of a curve segment while it was unknown if the superiority would This is the Pre-Published Version.

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The use of a photogrammetric method for the three-dimensional evaluation of spinal correction in scoliosis

Cited by 5 publications

References 13 publications

Comparison of two- and three-dimensional measurement of the Cobb angle in scoliosis

Comparison of two- and three-dimensional measurement of the Cobb angle in scoliosis

Three-dimensional reconstructions of Lenke 1A curves

Assessment of Maximum Spinal Deformity in Scoliosis: A Literature Review

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