Assessment of scoliotic deformity from back shape asymmetry using an improved mathematical model

Drerup, Burkhard; Hierholzer, E.

doi:10.1016/0268-0033(96)00025-3

Cited by 71 publications

(67 citation statements)

References 6 publications

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“…Worthy of note, the correlation between the two methods was similar in patients with a Cobb angle \30°and C30°, confirming that in our group of patients presenting a Cobb angle \50° [19], the rasterstereography is a reliable method for VR evaluation.…”

Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

“…Among these techniques, rasterstereography provides a reliable method for three-dimensional back shape analysis and reconstruction of spinal deformities without radiation exposure [19]. Rasterstereography is a method for stereophotogrammetric surface measuring of the back, originally developed by Drerup and Hierholzer [19]. It has been demonstrated that rasterstereography produces reliable data in patients with conservatively and surgically treated AIS, up to a Cobb angle of 80° [20,21], so that some authors have proposed to space out radiographs with rasterstereography in AIS long-term follow-up [22].…”

Section: Introductionmentioning

confidence: 99%

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Vertebral rotation in adolescent idiopathic scoliosis calculated by radiograph and back surface analysis-based methods: correlation between the Raimondi method and rasterstereography

et al. 2012

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Purpose The aim of the present research is to evaluate the relationship between an X-ray-based method (i.e. the Raimondi method) and rasterstereography in the evaluation of vertebral rotation (VR) in a sample of adolescent idiopathic scoliosis (AIS) patients. Methods A total of 25 patients (9 males; mean age 14 ± 3 years; mean height 160.7 ± 11.9 cm; mean weight 52.4 ± 10.7 kg) were considered for the present analysis. The mean Cobb angle was 30°± 9°. The evaluation of VR on radiographs was made using the Raimondi method regolo (Marrapese Editore-Demi S.r.1., Rome). Rasterstereography was performed by means of Formetric 4D Ò (Diers International GmbH, Schlangenbad, Germany). Correlations between rasterstereographic and radiographic measurement of VR were calculated, both for the whole sample and for thoracic and lumbar spinal segments considered separately, as well as for subgroups of patients with a Cobb angle \30°and C30°using Spearman's correlation coefficient by rank (r s ). Results When applied to the entire spine, measurement of VR by means of the two methods highlighted a significant correlation in the whole group (r = 0.52; p \ 0.0001), as well as in the \30°Cobb (r = 0.47; p = 0.0001) and C30°Cobb (r = 0.42; p \ 0.0001) subgroups. A significant correlation was found also when lumbar and thoracic VR were considered as separated groups (r = 0.30, p = 0.024 and r = 0.47, p = 0.002, respectively).Conclusions Rasterstereographic evaluation of VR shows a good correlation with the Raimondi method, thereby confirming the possibility to use this non-invasive method for deformity assessment in AIS patients.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vertebral rotation in adolescent idiopathic scoliosis calculated by radiograph and back surface analysis-based methods: correlation between the Raimondi method and rasterstereography

et al. 2012

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“…Methods range from tactile measurements such as the scoliometer [7] and the spinal rotation meter [21] to optical methods such as moiré topography [1,13] and structured light techniques, the most well known being ISIS (Integrated Shape Imaging System) [28], Quantec [12,14,20] and Jenoptik Formetric [9][10][11]. All were successfully applied to the monitoring of scoliosis and are still in use at some clinics, but they were no longer being actively marketed in the UK at the time this work began.…”

Section: Introductionmentioning

confidence: 99%

A new system for measuring three-dimensional back shape in scoliosis

et al. 2008

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The aim of this work was to develop a low-cost automated system to measure the three-dimensional shape of the back in patients with scoliosis. The resulting system uses structured light to illuminate a patient's back from an angle while a digital photograph is taken. The height of the surface is calculated using Fourier transform profilometry with an accuracy of ±1 mm. The surface is related to body axes using bony landmarks on the back that have been palpated and marked with small coloured stickers prior to photographing. Clinical parameters are calculated automatically and presented to the user on a monitor and as a printed report. All data are stored in a database. The database can be interrogated and successive measurements plotted for monitoring the deformity changes. The system developed uses inexpensive hardware and open source software. Accurate surface topography can help the clinician to measure spinal deformity at baseline and monitor changes over time. It can help the patients and their families to assess deformity. Above all it reduces the dependence on serial radiography and reduces radiation exposure when monitoring spinal deformity.

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“…The position of the centre of the vertebrae is reconstructed with an accuracy of 3.9 mm [6], in comparison with radiographic scans. Compared with the method of Drerup and Hierholzer, the described system has a similar accuracy: a lateral deviation of the spine of 0.9 mm and an axial rotation of the spine of 0.4…”

Section: Discussionmentioning

confidence: 99%

A 4D-Optical Measuring System for the Dynamic Acquisition of Anatomical Structures

Denis

Huysmans

Wilde

et al. 2004

Medical Image Computing and Computer-Assisted Intervention – MICCAI 2004

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Abstract. This paper presents a novel measuring system for the detection of moving skeletal structures. The system uses white light raster line triangulation in combination with biomechanical modeling techniques. White light raster line triangulation visualizes surfaces (e.g. the back surface) in an accurate and repeatable way, without detrimental effects, and without making contact to the human body. By making use of modeling techniques such as active contour models, active shape models and inverse kinematic models, biomechanically relevant results such as the position of the skeletal segments during motion are obtained.

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Assessment of scoliotic deformity from back shape asymmetry using an improved mathematical model

Cited by 71 publications

References 6 publications

Vertebral rotation in adolescent idiopathic scoliosis calculated by radiograph and back surface analysis-based methods: correlation between the Raimondi method and rasterstereography

Vertebral rotation in adolescent idiopathic scoliosis calculated by radiograph and back surface analysis-based methods: correlation between the Raimondi method and rasterstereography

A new system for measuring three-dimensional back shape in scoliosis

A 4D-Optical Measuring System for the Dynamic Acquisition of Anatomical Structures

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