Three-Dimensional Spinal and Pelvic Alignment in an Asymptomatic Population

Gangnet, N.; Dumas, Raphaël; Pomero, Vincent; Mitulescu, Anca; Skalli, Wafa; Vital, Jean-Marc

doi:10.1097/01.brs.0000224533.19359.89

Cited by 44 publications

(28 citation statements)

References 38 publications

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“…The evaluation of spine sagittal alignment is increasingly pursued in clinical practice as several parameters correlating with clinical outcomes have been described [1][2][3][4][5][6][7][8]. These measurements include various spinal angles and plumb lines, but it is increasingly evident that assessment of spinal deformity must include pelvic parameters [2].…”

Section: Introductionmentioning

confidence: 99%

Sacro-femoral-pubic angle: a coronal parameter to estimate pelvic tilt

et al. 2011

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The pelvic tilt is an essential measure in the context of radiographic evaluation of spinal deformity and malalignment. Given the routinely excellent visibility of coronal films this study established the SFP as a coronal parameter which can reliably estimate pelvic tilt. The high correlation and predictive ability of the SFP angle should prompt further study and clinical application when lateral radiographs do not permit assessment of pelvic parameters.

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Section: Introductionmentioning

confidence: 99%

Sacro-femoral-pubic angle: a coronal parameter to estimate pelvic tilt

et al. 2011

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“…The 3D reconstruction in upright posture allows investigating specific 3D parameters that are clinically relevant for the study of spinal alignment, especially in the case of scoliotic spine: vertebral and intervertebral 3D orientation [26,29,32,51,60], 3D location of vertebrae in the transversal plane (top view) [14,27,33,40], with respect to gravity line [30] or to 3D plumb lines [32] and planes of maximal deformity [5,11,12,50]. To do so, a vertebral reference frame [62] is deduced from the 3D reconstructed landmarks.…”

Section: Introductionmentioning

confidence: 99%

A semi-automated method using interpolation and optimisation for the 3D reconstruction of the spine from bi-planar radiography: a precision and accuracy study

Dumas

Blanchard²,

Carlier

et al. 2007

Med Bio Eng Comput

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The 3D reconstruction of the spine in upright posture can be obtained by bi-planar radiographic methods, developed since the 1970s. The principle is to identify 4-25 anatomical landmarks per vertebrae and per images. This identification time is hardly manageable in clinical practice. A semi-automated method is used: 3D standard vertebral models are positioned along with a 3D curve (identified all the way through the vertebral bodies). The silhouettes of the models of C7 and L5 vertebrae are first adjusted and the positions of the other vertebrae are interpolated and optimised. The inter- and intra-operator variabilities and the errors between the semi-automated method and the manual identification of six anatomical landmarks per vertebra are evaluated on 20 pairs of X-ray images of subjects with different spinal deformities. The identification time for the semi-automated method is 5 min. For scolitic subjects, the precision is under 2.2 degrees and the accuracy is under 3.2 degrees for all lateral, sagittal and axial rotations.

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“…The angle of the device was standardized for each spinal level based on the average curvature of the thoracic spine from a radiographic study of normal asymptomatic individuals, 20 as previous research indicates applied force angle affects spinal stiffness measurements. 5 The angle was measured using a 180° protractor built into the device.…”

Section: Equipment and Measurementmentioning

confidence: 99%