Anatomy of the proximal femur as seen with three-dimensional magnetic resonance imaging

Area of Science:

• Orthopedic surgery
• Medical imaging
• Biomedical engineering

Background:

• Musculoskeletal system studies benefit from advanced imaging.
• Three-dimensional (3D) imaging techniques represent a significant advancement.
• Magnetic resonance imaging (MRI) is increasingly applied to musculoskeletal research.

Purpose of the Study:

• Introduce 3D MRI for proximal femoral anatomy examination.
• Propose 3D MRI as an improvement for prosthetic hip design.
• Quantify proximal femur marrow cavity variability.

Main Methods:

• Scanned 14 cadaver proximal femurs using 3D MRI (FISP technique).
• Utilized an MRI image-processing workstation for image manipulation.
• Generated rotated surface reconstructions and multiplanar reformatted images.

Main Results:

• Marrow cavity contours closely mirror external cortical contours.
• Axially reformatted images enabled relative marrow cavity area measurements.
• Quantified significant variability in marrow cavity dimensions between subjects.

Conclusions:

• 3D MRI is effective for detailed proximal femoral anatomy assessment.
• This technique offers potential improvements in prosthetic hip design.
• Understanding femoral variability is crucial for implant fit and function.