How to do and evaluate DWI and DCE-MRI sequences for diabetic foot assessment

Area of Science:

• Radiology
• Medical Imaging
• Diabetic Foot Complications

Background:

• Diabetic foot MRI evaluation presents significant interpretive and technical challenges.
• Distinguishing neuropathic osteoarthropathy (Charcot's foot) from osteomyelitis is critical for appropriate patient management.
• These conditions often coexist in diabetic patients, necessitating accurate differentiation for distinct prognoses and treatments.

Purpose of the Study:

• To review the fundamental concepts of diffusion-weighted imaging (DWI) and dynamic contrast-enhanced MRI (DCE-MRI).
• To provide technical adjustments and practical interpretation tips for applying DWI and DCE-MRI in diabetic foot assessment.
• To highlight the potential of advanced MRI sequences in improving diagnostic accuracy for diabetic foot conditions.

Main Methods:

• Review of existing studies on the effectiveness of DWI and DCE-MRI in diabetic foot assessment.
• Explanation of DWI principles for assessing bone marrow and soft tissue cellularity without exogenous contrast.
• Description of DCE-MRI techniques for evaluating soft tissue and bone marrow perfusion.

Main Results:

• DWI provides insights into tissue cellularity, complementing traditional MRI.
• DCE-MRI offers precise perfusion evaluation of soft tissues and bone marrow.
• Studies show promising results for DWI and DCE-MRI in differentiating septic from reactive bone marrow and soft tissue involvement.

Conclusions:

• Incorporating DWI and DCE-MRI into standard diabetic foot protocols can enhance diagnostic capabilities.
• These advanced sequences aid radiologists in distinguishing between Charcot's foot and osteomyelitis.
• The combined data from traditional MRI with DWI and DCE-MRI improve the comprehensive assessment of the diabetic foot.