The University of Osaka · Medicine
Professor Keisuke Uemura's research lab specializes in musculoskeletal biomechanics and medical imaging, focusing on the three-dimensional (3D) assessment of hip joint pathoanatomy using advanced imaging techniques such as CT and DXA. The lab investigates dynamic and static femoral head coverage, pelvic sagittal inclination, and implant positioning in conditions like hip dysplasia and osteoarthritis, aiming to improve diagnostic accuracy and surgical planning. A key focus is the development of open-source, clinically applicable tools for quantitative imaging analysis, particularly in total hip arthroplasty and osteoporosis screening. The lab integrates patient-specific 3D modeling with in-vivo kinematic data to bridge the gap between anatomical structure and functional joint behavior.
Figures are computed from collected data and may differ slightly.
Our findings will aid clinicians in choosing a set of radiographs to capture cam morphology in the assessment of patients with hip pain.
Individuals with over- or under-covered hips may develop hip osteoarthritis. Femoral head coverage is typically evaluated using radiographs, and/or computed tomography (CT) or magnetic resonance images obtained supine. Yet, these static assessments of coverage may not provide accurate information regarding the dynamic, three-dimensional (3-D) relationship between the femoral head and acetabulum. The objectives of this study were to: (1) quantify total and regional 3-D femoral head coverage in a
Accurate DXA-BMD measurements and diagnosis of osteoporosis were performed from CT images using the system developed herein. As the models are open-source, clinicians can use the proposed system to screen osteoporosis and determine the surgical strategy for hip surgery.
Stem anteversion in the setting of total hip arthroplasty (THA) is usually measured by referencing the posterior condylar line (PCL). However, stem anteversion may not express the functional torsion of the femur if a consistent horizontal tilt in the PCL is observed after THA. Herein, the horizontal tilt of the PCL at the resting neutral position of the hip was retrospectively measured in 53 THA patients from three computed tomography (CT) datasets: (i) preoperative (preop-CT), (ii) 3 weeks afte
Improved understanding of how three-dimensional (3D) femoral head coverage changes as the pelvic sagittal inclination (PSI) is altered would advance clinical diagnosis of hip pathoanatomy. Herein, we applied computer modeling of 3D computed tomography reconstructions of the pelvis and proximal femur to quantify relationships between the PSI and regional 3D femoral head coverage. Eleven healthy, young adult participants with typically developed hip anatomy were analyzed. The orientation of the pe
Pelvic sagittal inclination (PSI) is often evaluated in patients with hip pathology using lateral radiographs. However, it would be useful if PSI could be predicted from an anteroposterior radiograph since this film is ubiquitous in the evaluation of hip pathology. Herein, computer-modeling was applied to predict PSI from radiographic measurements assessed in the anteroposterior plane. Three-dimensional surface models of the pelvis, femur, and sacrum were reconstructed from computed tomography i
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