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BACKGROUND There is an increasing recognition of the clinical importance of the sagittal plane alignment of the spine. A prospective study of several radiographic parameters of the sagittal profile of the spine was conducted to determine the physiological values of these parameters, to calculate the variations of these parameters according to(More)
Reconstruction methods from biplanar X-rays provide 3D analysis of spinal deformities for patients in standing position with a low radiation dose. However, such methods require an important reconstruction time and there is a clinical need for fast and accurate techniques. This study proposes and evaluates a novel reconstruction method of the spine from(More)
STUDY DESIGN Prospective radiographic and forceplate analysis in adult volunteers. OBJECTIVE Assess gravity line (GL) location and foot position regarding anatomic spinal structures to evaluate key correlations and age-related changes in balance. SUMMARY OF BACKGROUND DATA Global spinal balance is commonly assessed by the C7 plumbline. This radiographic(More)
In clinical routine, lower limb analysis relies on conventional X-ray (2D view) or computerised tomography (CT) Scan (lying position). However, these methods do not allow 3D analysis in standing position. The aim of this study is to propose a fast and accurate 3D-reconstruction-method based on parametric models and statistical inferences from biplanar(More)
STUDY DESIGN Prospective randomized study of patients undergoing lumbar arthrodesis. OBJECTIVES To quantify MRI changes of the erector spinae following lumbar surgery through a posterior approach and the possible protection of these muscles during surgery by the use of cholinergic blockade. SUMMARY OF BACKGROUND DATA It has been shown that lumbar spine(More)
STUDY DESIGN A reliability study was conducted in quantitative 3-dimensional (3D) measurements for mild scoliosis. OBJECTIVE To evaluate the intrarater and interrater reliability of a computer tool used for 3D reconstruction of the spine. SUMMARY OF BACKGROUND DATA No reliability study of spinal in vivo 3D medical imaging measurements has been performed(More)
STUDY DESIGN Prospective study of 131 patients and volunteers recruited for an analysis of spinal alignment and gravity line (GL) assessment by force plate analysis. OBJECTIVE To determine relationships between GL, foot position, and spinopelvic landmarks in subjects with varying sagittal alignment. Additionally, the study sought to analyze the role of(More)
STUDY DESIGN This is a prospective radiographic and force plate analysis involving adult volunteer and patients with scoliosis. OBJECTIVE To assess accurately the center of pressure in standing volunteers and patients with scoliosis, and correlate these finding with radiographic data. SUMMARY OF BACKGROUND DATA A simple and commonly applied parameter of(More)
A three-dimensional (3D) reconstruction algorithm based on contours identification from biplanar radiographs is presented. It requires, as technical prerequisites, a method to calibrate the biplanar radiographic environment and a surface generic object (anatomic atlas model) representing the structure to be reconstructed. The reconstruction steps consist(More)