Correlation between Cobb angle, spinous process angle (SPA) and apical vertebrae rotation (AVR) on posteroanterior radiographs in adolescent idiopathic scoliosis (AIS)

Morrison, Devlin G.; Chan, Amanda Cy; Hill, Doug; Parent, Éric; Lou, Edmond

doi:10.1007/s00586-014-3684-1

Cited by 30 publications

(22 citation statements)

References 16 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Future studies can also be followed up to understand whether considering the vertebral rotation and other spinal deformities can further improve the agreement [ 49 ]. AIS is a three-dimensional spine deformity problem in coronal and sagittal planes and vertebral rotation [ 1 ], and deformity parameters in different planes may be dependent on each other [ 50 – 52 ].…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, it is necessary to quantify spinal curvatures in sagittal or vertebral rotation in addition to coronal deformity, which will be useful for planning surgery, predicting prognosis and monitoring curve progression [ 30 , 53 , 54 ]. A recent study showed that the correlation between the spinous angle and the Cobb angle measured on radiographs could be improved with the consideration of vertebral rotation [ 49 ]. However, standing radiograph as the current gold standard for scoliosis investigation is difficult to directly acquire vertebral rotation, since these radiographs do not demonstrate the exact magnitude of the 3-dimensional spinal deformity present in patients with scoliosis [ 55 ].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

A reliability and validity study for Scolioscan: a radiation-free scoliosis assessment system using 3D ultrasound imaging

et al. 2016

View full text Add to dashboard Cite

BackgroundRadiographic evaluation for patients with scoliosis using Cobb method is the current gold standard, but radiography has radiation hazards. Several groups have recently demonstrated the feasibility of using 3D ultrasound for the evaluation of scoliosis. Ultrasound imaging is radiation-free, comparatively more accessible, and inexpensive. However, a reliable and valid 3D ultrasound system ready for clinical scoliosis assessment has not yet been reported. Scolioscan is a newly developed system targeted for scoliosis assessment in clinics by using coronal images of spine generated by a 3D ultrasound volume projection imaging method. The aim of this study is to test the reliability of spine deformity measurement of Scolioscan and its validity compared to the gold standard Cobb angle measurements from radiography in adolescent idiopathic scoliosis (AIS) patients.MethodsProspective study divided into two stages: 1) Investigation of intra- and inter- reliability between two operators for acquiring images using Scolioscan and among three raters for measuring spinal curves from those images; 2) Correlation between the Cobb angle obtained from radiography by a medical doctor and the spine curve angle obtained using Scolioscan (Scolioscan angle). The raters for ultrasound images and the doctors for evaluating radiographic images were mutually blinded. The two stages of tests involved 20 (80 % females, total of 26 angles, age of 16.4 ± 2.7 years, and Cobb angle of 27.6 ± 11.8°) and 49 (69 % female, 73 angles, 15.8 ± 2.7 years and 24.8 ± 9.7°) AIS patients, respectively. Intra-class correlation coefficients (ICC) and Bland-Altman plots and root-mean-square differences (RMS) were employed to determine correlations, which interpreted based on defined criteria.ResultsWe demonstrated a very good intra-rater and intra-operator reliability for Scolioscan angle measurement with ICC larger than 0.94 and 0.88, respectively. Very good inter-rater and inter-operator reliability was also demonstrated, with both ICC larger than 0.87. For the thoracic deformity measurement, the RMS were 2.5 and 3.3° in the intra- and inter-operator tests, and 1.5 and 3.6° in the intra- and inter-rater tests, respectively. The RMS differences were 3.1, 3.1, 1.6, 3.7° in the intra- and inter-operator and intra- and inter-rater tests, respectively, for the lumbar angle measurement. Moderate to strong correlations (R2 > 0.72) were observed between the Scolioscan angles and Cobb angles for both the thoracic and lumbar regions. It was noted that the Scolioscan angle slightly underestimated the spinal deformity in comparison with Cobb angle, and an overall regression equation y = 1.1797x (R2 = 0.76) could be used to translate the Scolioscan angle (x) to Cobb angle (y) for this group of patients. The RMS difference between Scolioscan angle and Cobb angle was 4.7 and 6.2°, with and without the correlation using the overall regression equation.ConclusionsWe showed that Scolioscan is reliable for measuring coronal deformity for patients with AIS and appears ...

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A reliability and validity study for Scolioscan: a radiation-free scoliosis assessment system using 3D ultrasound imaging

et al. 2016

View full text Add to dashboard Cite

show abstract

“…A high correlation between the 2D and 3D measurements was also reported [18]; however, the agreement between the two measurement techniques and specifics regarding the clinically significant differences between the 2D and 3D parameters as a function of 3D deformities of the spine in transverse plane was not characterized. It has been shown that considering the apical rotation, although measured on the 2D radiographs, will improve the prediction of the Cobb angle from the 2D measurements of the spine which suggest the relationship between the frontal and transverse plane parameters in a scoliotic spine [22]. In line with the current body of Table 2 The Coefficient of correlation between the 2D and 3D spinal measurements (PP) differences and the 3D spinopelvic parameters (p \ 0.05) The relationship between the thoracic and lumbar measurement differences and PMC, apical rotation, and Cobb measurements is only presented in the area of interest, i.e., thoracic or lumbar Eur Spine J literature we found a high correlation between the 2D and 3D parameters; however, further analysis showed significant differences between the 2D and 3D parameters mean values in the sagittal plane.…”

Section: Discussionmentioning

confidence: 99%

Characterizing the differences between the 2D and 3D measurements of spine in adolescent idiopathic scoliosis

et al. 2016

View full text Add to dashboard Cite

show abstract

“…SPA and AVR improve the prediction of the Cobb angle. 44 In this study, the transverse plane deformation was analysed by assessing the ATR. Krawczyński et al (2006) proved that the thoracic curvatures by means of ATR correlate with Cobb angle as well as the longitudinal axis rotation of the apical vertebrae.…”

Section: Discussionmentioning

confidence: 99%

The SpinalMeter biometrical assessment to improve posture diagnosis in school-age girls: a validation study

Kamelska-Sadowska

Protasiewicz-Fałdowska

Zaborowska-Sapeta

et al. 2020

Pol. Ann. Med.

View full text Add to dashboard Cite

Introduction: Assessing spinal deformities using an X-ray radiation is the method of choice for posture diagnosis. It is also used for the evaluation of the degree of correction, brace fit, and spinal balance as well as for further management decisions. However, multiple X-ray exposures during control visits could be too burdensome for children. Aim: The aim of this study was to investigate the precision and repeatability of measurement of the variables obtained by a fast, simple postural evaluation in children by the SpinalMeter. Material and methods: The measurements of the angle of trunk rotation (ATR) and SpinalMeter posture assessments were performed 8 to 10 times in a short period of time (6 s). The overall of 300 photos (SpinalMeter) and 1020 measurements (asymmetry, distance between anthropometric points as well as ATR) were obtained from 6 girls (8–15 years old). The validation study comprised of the repeatability, interclass correlation coefficient (Qw) and relative standard deviation (rSD) measurements. Results and discussion: The measurements of the distance between acromion–popliteal fossa, acromion–iliac crest, and acromion–posterior superior iliac spine obtained by SpinalMeter were clearly repeatable (Qw > 0.9). The scapular and pelvic asymmetry in standing and sitting positions were highly repeatable and had low rSD (e.g. for scapular asymmetry 5.6%–80.3%; Qw > 0.8). Conclusions: The precise and reliable postural biometrical measurements were performed by SpinalMeter in the case of the distance between anthropometric points and asymmetry of pelvis and scapula. These measurements could be useful in the assessment of girl’s posture when visiting the pediatrician.

show abstract

Correlation between Cobb angle, spinous process angle (SPA) and apical vertebrae rotation (AVR) on posteroanterior radiographs in adolescent idiopathic scoliosis (AIS)

Abstract: The SPA has high correlation with the Cobb angle. Including the AVR as an additional factor in multiple regression improves the prediction of the Cobb angle.

Cited by 30 publications

References 16 publications

A reliability and validity study for Scolioscan: a radiation-free scoliosis assessment system using 3D ultrasound imaging

A reliability and validity study for Scolioscan: a radiation-free scoliosis assessment system using 3D ultrasound imaging

Characterizing the differences between the 2D and 3D measurements of spine in adolescent idiopathic scoliosis

The SpinalMeter biometrical assessment to improve posture diagnosis in school-age girls: a validation study

Contact Info

Product

Resources

About