Gravity center estimation for evaluation of standing whole body compensation using virtual barycentremetry based on biplanar slot-scanning stereoradiography - validation by simultaneous force plate measurement.
Barycentremetry
EOS®system
Force plate measurement
Gravity center
Whole body standing alignment
Journal
BMC musculoskeletal disorders
ISSN: 1471-2474
Titre abrégé: BMC Musculoskelet Disord
Pays: England
ID NLM: 100968565
Informations de publication
Date de publication:
03 Jan 2022
03 Jan 2022
Historique:
received:
23
07
2021
accepted:
08
12
2021
entrez:
4
1
2022
pubmed:
5
1
2022
medline:
6
1
2022
Statut:
epublish
Résumé
Whole body standing alignment (WBSA) in terms of biomechanics can be evaluated accurately only by referring the gravity line (GL) which lies on the gravity center (GC). Here, we introduce a method for estimating GL and simultaneous WBSA measurement using the EOS® imaging system and report on the reproducibility and reliability of the method. A 3-dimensional (3D) avatar to estimate GC was created following three steps: 3D reconstruction of the bone based on EOS images; deformation into a generic morphotype (MakeHuman statistical model) before density integration with 3D rasterization of the full body into 1-mm Statistical analyses of the data revealed that the repeatability and reproducibility of the estimation was high with intra-rater and inter-rater intraclass correlation coefficient. ≥0.999. The coordinate values of the GC and body weight estimation did not differ significantly between the avatar and force plate measurements, demonstrating the high accuracy of the method. This new method of estimating GC and WBSA is reliable and accurate. Application of this method could allow clinicians to quickly and qualitatively evaluate WBSA with GL with various spinal malalignment pathologies.
Sections du résumé
BACKGROUND
BACKGROUND
Whole body standing alignment (WBSA) in terms of biomechanics can be evaluated accurately only by referring the gravity line (GL) which lies on the gravity center (GC). Here, we introduce a method for estimating GL and simultaneous WBSA measurement using the EOS® imaging system and report on the reproducibility and reliability of the method.
METHODS
METHODS
A 3-dimensional (3D) avatar to estimate GC was created following three steps: 3D reconstruction of the bone based on EOS images; deformation into a generic morphotype (MakeHuman statistical model) before density integration with 3D rasterization of the full body into 1-mm
RESULTS
RESULTS
Statistical analyses of the data revealed that the repeatability and reproducibility of the estimation was high with intra-rater and inter-rater intraclass correlation coefficient. ≥0.999. The coordinate values of the GC and body weight estimation did not differ significantly between the avatar and force plate measurements, demonstrating the high accuracy of the method.
CONCLUSION
CONCLUSIONS
This new method of estimating GC and WBSA is reliable and accurate. Application of this method could allow clinicians to quickly and qualitatively evaluate WBSA with GL with various spinal malalignment pathologies.
Identifiants
pubmed: 34980054
doi: 10.1186/s12891-021-04948-5
pii: 10.1186/s12891-021-04948-5
pmc: PMC8725375
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
22Informations de copyright
© 2021. The Author(s).
Références
Gait Posture. 2014 Jan;39(1):224-8
pubmed: 23910725
Eur Spine J. 2007 Sep;16(9):1459-67
pubmed: 17211522
Eur Spine J. 2016 Nov;25(11):3675-3686
pubmed: 27432430
Bull Acad Natl Med. 2005 Feb;189(2):287-97; discussion 297-300
pubmed: 16114859
Bone Joint J. 2020 Oct;102-B(10):1359-1367
pubmed: 32993332
Eur Spine J. 2019 Sep;28(9):1889-1905
pubmed: 31332569
J Bone Joint Surg Am. 2014 Oct 1;96(19):1631-40
pubmed: 25274788
Spine (Phila Pa 1976). 2009 Jul 1;34(15):E519-27
pubmed: 19564757
Eur Spine J. 2020 Sep;29(9):2319-2328
pubmed: 32306304
Int Orthop. 2012 Jul;36(7):1325-31
pubmed: 22371113
Eur Spine J. 2010 May;19(5):760-7
pubmed: 20035359
Spine (Phila Pa 1976). 2003 Jan 1;28(1):63-9
pubmed: 12544958
Ann Biomed Eng. 1992;20(4):451-62
pubmed: 1510296
Eur Spine J. 2011 Sep;20 Suppl 5:699-703
pubmed: 21811823
Spine (Phila Pa 1976). 2010 Apr 20;35(9):989-94
pubmed: 20228703
J Neurosurg Spine. 2016 Mar;24(3):436-46
pubmed: 26565764
Surg Radiol Anat. 2003 Nov-Dec;25(5-6):424-33
pubmed: 13680185
Eur Spine J. 2016 Nov;25(11):3666-3674
pubmed: 27055441
Spine (Phila Pa 1976). 2013 Jun 1;38(13):E803-12
pubmed: 23722572
Spine (Phila Pa 1976). 2008 Jun 15;33(14):1572-8
pubmed: 18552673
Eur Spine J. 2018 Feb;27(2):397-405
pubmed: 28589303
J Child Orthop. 2016 Feb;10(1):1-14
pubmed: 26883033
Am J Orthod Dentofacial Orthop. 1999 Jul;116(1):82-5
pubmed: 10393584
Acta Odontol Scand. 1971 Nov;29(5):591-607
pubmed: 5290983
Int Orthop. 2008 Dec;32(6):809-16
pubmed: 17653545
Spine (Phila Pa 1976). 2006 Dec 1;31(25):E959-67
pubmed: 17139212
Eur Spine J. 2011 Sep;20 Suppl 5:626-33
pubmed: 21796393
Spine (Phila Pa 1976). 2005 Jul 1;30(13):1535-40
pubmed: 15990669
J Anat. 2017 May;230(5):619-630
pubmed: 28127750
J Strength Cond Res. 2005 Feb;19(1):231-40
pubmed: 15705040
Spine (Phila Pa 1976). 1991 Jul;16(7):750-6
pubmed: 1833827
Spine (Phila Pa 1976). 2007 Feb 15;32(4):E141-6
pubmed: 17304124