Diffusion-weighted MR imaging in musculoskeletal diseases: current concepts.

Area of Science:

• Radiology and Medical Imaging
• Oncology
• Orthopedics

Background:

• Magnetic Resonance (MR) imaging is crucial for musculoskeletal condition assessment.
• Diffusion-weighted MR imaging (DWI) offers insights into lesion cellularity.
• Apparent diffusion coefficient (ADC) values quantify water molecule movement.

Purpose of the Study:

• To evaluate the diagnostic utility and capabilities of DWI in musculoskeletal diseases.
• To assess DWI's role in characterizing musculoskeletal cancers and monitoring therapy response.

Main Methods:

• Review of existing literature on DWI and ADC values in musculoskeletal imaging.
• Analysis of DWI's effectiveness in evaluating disease extent, particularly in cancers.
• Comparison of DWI/ADC with conventional MR imaging techniques for tissue characterization and therapy monitoring.

Main Results:

• Literature on DWI in musculoskeletal diseases yields conflicting diagnostic results.
• DWI demonstrates utility in evaluating the extent of certain musculoskeletal cancers.
• ADC values show potential as a reliable tool for monitoring therapy response in cancer and inflammatory diseases.

Conclusions:

• DWI can be an adjunct to conventional MR imaging for musculoskeletal tissue characterization, especially in cancers.
• Interpretation of DWI requires integration with conventional sequences and lesion signal characteristics.
• ADC values are valuable for therapy response monitoring but necessitate comparison with baseline values and knowledge of treatment.