Estimation of spinopelvic muscles’ volumes in young asymptomatic subjects: a quantitative analysis

Abstract

Spinopelvic muscles' values for a reference population have been reported. A new model predicting the muscles' volumes from a reduced set of MRI slices is proposed. While this model still needs to be validated on other populations, the current study appears promising for clinical use to determine, quantitatively, the muscular degradation.

Quantifying skeletal muscle volume and shape in humans using MRI: A systematic review of validity and reliability

“…The articles included primarily focused on segmentation techniques. Manual techniques (including slice by slice cross sectional area (CSA) segmentation, segmentation of CSA in a reduced number of slice(s), segmentation of CSA on one slice and muscle length use) were evaluated in twenty-four articles [9,25–28,45–58,60–64] and partially or completely automatic segmentation techniques (deformation of a parametric specific object, semi-automated and automated atlas-based, image-based and shape-based, atlas-based and statistical shape-based, and interactive-segmentation using shape priors and statistical shape modelling methods) were evaluated in ten articles [27,29,48,53,59,64–68].…”

“…Seventeen articles included only healthy subjects [26,27,45–50,52,53,57–60,62,64,67] and six included subjects with a muscular pathology of which five were on adults with: low back pain, total unilateral arthroplasty, anterior cruciate ligament reconstruction, chronic obstructive pulmonary disease or knee osteoarthritis [9,28,61,63,65]; the fifth article was on children with cerebral palsy [51]. Three articles evaluated cadavers [25,54,56].…”

Relationships between radiographic parameters and spinopelvic muscles in adult spinal deformity patients

“…Then, the relationships between muscle characteristics, radiographic and clinical parameters were analyzed. Different patients groups were defined according SRS-Schwab classification criteria (SVA greater than 40 mm, PI-LL greater than 10°, and pelvic tilt greater than 20°) and abnormally high ODHA value (greater than 6.1°, based on analysis of asymptomatic subjects) [10,21,24]. Muscles characteristics (volume and FI) of patients were compared between these groups.…”

“…The use of new 3D reconstruction methods with MRI makes it possible to better quantify and characterize muscles, thus to better understand their impact on spinal deformity and its evolution [10][11][12]. Moal et al were the first to use this specific MRI in spinal pathology; they described the muscles characteristics of 19 adult patients with spinal deformity [11].…”

“…Moal et al were the first to use this specific MRI in spinal pathology; they described the muscles characteristics of 19 adult patients with spinal deformity [11]. Amabile et al, more recently, from a cohort of young, non-deformed subjects, reported muscle volume values from T12 to the femoral condyles, thus constituting the first database of asymptomatic subjects [10]. However, none of these studies analyzed the relationships between radiographic and muscular parameters, and to our knowledge, no work exists on the relationship between the existence of a rotatory subluxation and soft tissue degeneration (particularly muscles).…”