Validation of 3D spino-pelvic muscle reconstructions based on dedicated MRI sequences for fat-water quantification
TypeArticles dans des revues avec comité de lecture
Objectives: To evaluate a protocol, including MRI acquisition with dedicated sequences for fat-water quantification and semi-automatic segmentation, for 3D geometry measurement and fat infiltration of key muscles of the spino-pelvic complex. Materials and Methods: MRI Protocol: Two axial acquisitions from the thoraco-lumbar region to the patella were obtained: one T1 weighted and one based on the Dixon method, permitted to evaluate the proportion of fat inside each muscle. Muscle Reconstruction: With Muscl’X software, 3D reconstructions of 18 muscles or groups of muscles were obtained identifying their contours on a limited number of axial images (DPSO Method); 3D references were obtained only on T1 acquisitions identifying the contour of the muscles on all axial images. Evaluation: For two volunteers, three operators completed reconstructions three times across three sessions. Each reconstruction was projected on the reference to calculate the ‘point to surface’ error. Mean and maximal axial section, muscle volume, and muscle length calculated from the reconstructions were compared to reference values, and intra- and inter-operator variability for those parameters were evaluated. Results: 2xRMS ‘point to surface’ error was below 3 mm, on average. The agreement between the two methods was variable between muscles [-4.50; 8.00 %] for the mean axial section, the length and the volume. Intra- and inter-operator variability were less than 5% and comparison of variability for the Fat and T1 reconstructions did not reveal any significant differences. Discussion: Excellent inter- and intra-operator reliability was demonstrated for 3D muscular reconstruction using the DPSO method and Dixon images that allowed generation of patient-specific musculoskeletal models.
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MOAL, Bertrand; BRONSARD, Nicolas; RAYA, Jose G.; VITAL, Jean-Marc; SCHWAB, Frank; SKALLI, Wafa; LAFAGE, Virginie (Baishideng Publishing Group, 2015)AIM: To investigate fat infiltration and volume of spino-pelvic muscles in adults spinal deformity (ASD) with magnetic resonance imaging (MRI) and 3D reconstructions. METHODS: Nineteen female ASD patients (mean age 60 ± ...
Estimation of spinopelvic muscles' volumes in young asymptomatic subjects: a quantitative analysis. AMABILE, Célia; MOAL, Bertrand; CHATARA, Oussama Arous; PILLET, Hélène; RAYA, Jose G.; IANNESSI, Antoine; SKALLI, Wafa; LAFAGE, Virginie; BRONSARD, Nicolas (Springer, 2017)Purpose Muscles have been proved to be a major component in postural regulation during pathological evolution or aging. Particularly, spinopelvic muscles are recruited for compensatory mechanisms such as pelvic retroversion, ...
Radiographic Outcomes of Adult Spinal Deformity Correction : A Critical Analysis of Variability and Failures Across Deformity Patterns MOAL, Bertrand; SCHWAB, Franck; AMES, Christopher P.; SMITH, Justin; RYAN, Devon; PRAVEEN, Mummaneni; TERRAN, Jamie; KLINEBERG, Eric; HART, Robert; OHENEBA, Boachie-Adjei; SHAFFREY, Christopher; SKALLI, Wafa; LAFAGE, Virginie (Spine Deformity, 2014)Study Design: Multicenter, prospective, consecutive, surgical case series from the International Spine Study Group. Objectives: To evaluate the effectiveness of surgical treatment in restoring spinopelvic (SP) alignment. ...
Clinical Improvement Through Surgery for Adult Spinal Deformity: What Can Be Expected and Who Is Likely to Benefit Most ? MOAL, Bertrand; LAFAGE, Virginie; SMITH, Justin.S; AMES, Christopher P.; MUNDIS, Gregory; TERRAN, Jamie S.; KLINEBERG, Eric; HART, Robert; BOACHIE-ADJEI, Oheneba; SHAY, Bess; SKALLI, Wafa; SCHWAB, Frank (Scoliosis Research Society, 2015)Study Design: Multicenter, prospective, nonconsecutive, surgical case series from the International Spine Study Group. Objectives: To evaluate the extent of clinical improvement after surgery for adult spinal deformity ...
Spino-femoral muscles affect sagittal alignment and compensatory recruitment: a new look into soft tissues in adult spinal deformity BAO, Hongda; MOAL, Bertrand; VIRA, Shaleen; BRONSARD, Nicolas; AMABILE, Célia; ERRICO, Thomas; SCHWAB, Frank; SKALLI, Wafa; DUBOUSSET, Jean; LAFAGE, Virginie (Springer, 2020)Objective To quantify muscle characteristics (volumes and fat infiltration) and identify their relationship to sagittal malalignment and compensatory mechanism recruitment. Methods Female adult spinal deformity patients ...