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3D quasi-automatic spine length assessment using low dose biplanar radiography after surgical correction in thoracic idiopathic scoliosis

Article dans une revue avec comité de lecture
Author
LANGLAIS, T
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]
183200 Hôpital Trousseau
VERGARI, Claudio
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]
XAVIER, F
183200 Hôpital Trousseau
AL HAWSAWI, M
183200 Hôpital Trousseau
GAJNY, Laurent
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]
VIALLE, Raphaël
183200 Hôpital Trousseau
462029 Service des thérapies innovantes pour les maladies musculo-squelettiques [CHU Trousseau]
SKALLI, Wafa
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]
PIETTON, Raphaël
360410 CHU Trousseau [APHP]

URI
http://hdl.handle.net/10985/21437
DOI
10.1016/j.medengphy.2021.103735
Date
2022
Journal
Medical Engineering & Physics

Abstract

Background: As a leading cause of disability with a high societal and economic cost, it is crucial to better understand risk factors of neck pain and surgical complications. Getting subject-specific external loading is essential for quantifying muscle forces and joint loads but it requires exertion trials and load cells which are uncommon in clinical settings. Methods: This paper presents a method to compute the gravitational loading at four levels of the cervical spine (C3C4, C4C5, C5C6, C6C7) in neutral standing position from biplanar radiographs exclusively. The resulting load was decomposed in local disc frames and its components were used to compare different populations: 118 asymptomatic subjects and 46 patients before and after surgery (anterior cervical discectomy and fusion or total disc replacement). Comparisons were performed at C6C7 and the upper level adjacent to surgery. Findings: Significant changes in gravitational loading were observed with age in healthy subjects as well as in patients after surgery and have been associated with changes in posture. Interpretation: This approach quantifies the influence of postural changes on gravitational loading on the cervical spine. It represents a simple way to obtain necessary input for muscle force quantification models in clinical routine and to use them for patient evaluation. The study of the subsequent subject-specific spinal loading could help further the understanding of cervical spine biomechanics, degeneration mechanisms and complications following surgery.

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