Functional Classification of Patients With Idiopathic Scoliosis Assessed by the Quantec System

Liu, Xue C.; Thometz, John; Lyon, Richard H.; Klein, John P.

doi:10.1097/00007632-200106010-00020

Cited by 48 publications

(28 citation statements)

References 14 publications

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“…They concluded that Quantec reduces the variability in measurements of axial surface rotation in the thoracic region. Liu et al 25 strived to produce a functional classification of spinal deformity in patients with mild idiopathic scoliosis with using X-rays. They found that it is possible to produce a quantitative assessment of mild spine deformity with 3D parameters and no radiography.…”

Section: Discussionmentioning

confidence: 99%

Historical review and experience with the use of surface topographic systems in children with idiopathic scoliosis

Xc¹,

Thometz²,

Tassone³

et al. 2013

OA Musculoskeletal Medicine

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Section: Discussionmentioning

confidence: 99%

Historical review and experience with the use of surface topographic systems in children with idiopathic scoliosis

Xc¹,

Thometz²,

Tassone³

et al. 2013

OA Musculoskeletal Medicine

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“…Thus, during the last 30 years, many optical non-invasive surface measurement systems have been developed based on a 3D reconstruction of the back or of the whole trunk using various techniques: Moiré contour topography [40,42], Integrated Shape Imaging System (ISIS) [43] and Quantec scanner [16,32]. However, most studies have been focused on how to find the relationship between the Cobb angle and the indices computed from the trunk surface.…”

Section: Introductionmentioning

confidence: 99%

Scoliosis Follow-Up Using Noninvasive Trunk Surface Acquisition

Adankon

Chihab

Dansereau

et al. 2013

IEEE Trans. Biomed. Eng.

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Abstract-Adolescent Idiopathic Scoliosis (AIS) is a musculoskeletal pathology. It is a complex spinal curvature in threedimensional space that also affects the appearance of the trunk. The clinical follow-up of AIS is decisive for its management. Currently, the Cobb angle, which is measured from full spine radiography, is the most common indicator of scoliosis progression. However, cumulative exposure to X-rays radiation increases the risk for certain cancers. Thus, a non-invasive method for the identification of scoliosis progression from trunk shape analysis would be helpful. In this study, a statistical model is built from a set of healthy subjects using Independent Component Analysis (ICA) and Genetic Algorithm (GA). Based on this model, a representation of each scoliotic trunk from a set of AIS patients is computed and the difference between two successive acquisitions is used to determine if the scoliosis has progressed or not. This study was conducted on 58 subjects comprising 28 healthy subjects and 30 AIS patients who had trunk surface acquisitions in upright standing posture. The model detects 93% of the progressive cases and 80% of the non-progressive cases. Thus, the rate of false negatives, representing the proportion of undetected progressions, is very low, only 7%. This study shows that it is possible to perform a scoliotic patient's follow-up using 3D trunk image analysis, which is based on a non-invasive acquisition technique.

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“…For the kinematic assessment of posture and movement, imagebased methods such as photogrammetry [3][4][5][6] , optoelectric analysis [7][8][9] , and video analysis [10][11][12][13] are standard methods; however, these are difficult to use clinically, since the set-up and operation of these measurement devices is complicated and time-consuming. Therefore, kinematic assessment is limited to laboratory settings 14) .…”

Section: Introductionmentioning

confidence: 99%

Validity and Reliability of the Kinematic Analysis of Trunk and Pelvis Movements Measured by Smartphones during Walking

et al. 2013

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Abstract.[Purpose] The purpose of this study was to investigate the reliability and validity of the kinematic analysis of trunk and pelvis movement during gait and standing as measured by two smartphones (in the present study, we used iPod touches because of their weight).[Methods] Thirty-eight healthy adults (mean age, 21.4 ± 1.2 years) were instructed to stand and walk on a treadmill at three different speeds. The tilt angle of the trunk and pelvis were measured using both an iPod touch and an optoelectronic motion capture system (Optotrak).[Results] The error between the iPod touch and Optotrak was small during standing and walking at low speed. However, as the walking speed was increased, the error between the iPod touch and Optotrak increased. There were no significant differences between the test and retest measurement values of each device, nor were there any significant differences between the days of the analyses.[Conclusions] The iPod touch has good accuracy, since the variations in the test and retest and for different days were small. This suggests that the iPod touch can be used instead of the Optotrak for the kinematic analysis of trunk and pelvis movement at low walking speeds.

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Functional Classification of Patients With Idiopathic Scoliosis Assessed by the Quantec System

Abstract: The back surface image study is a method for providing a quantitative assessment of mild spinal deformity, allowing evaluation of patients by integrated three-dimensional parameters with no reference to radiographs.

Cited by 48 publications

References 14 publications

Historical review and experience with the use of surface topographic systems in children with idiopathic scoliosis

Historical review and experience with the use of surface topographic systems in children with idiopathic scoliosis

Scoliosis Follow-Up Using Noninvasive Trunk Surface Acquisition

Validity and Reliability of the Kinematic Analysis of Trunk and Pelvis Movements Measured by Smartphones during Walking

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