Texture Analysis of Cartilage Repair Tissue Maturation: Comparison of Two Cartilage Repair Methods and Correlation...

Area of Science:

• Orthopedics
• Radiology
• Biomedical Engineering

Background:

• Cartilage defects are common and challenging to treat, necessitating advanced regenerative techniques.
• Matrix-associated autologous chondrocyte transplantation (MACT) and microfracturing (MFX) are surgical options for cartilage repair.
• Assessing the maturation and quality of cartilage repair tissue is crucial for long-term outcomes.

Purpose of the Study:

• To evaluate cartilage graft maturation using quantitative T2 mapping and gray-level co-occurrence matrix (GLCM) texture analysis.
• To compare the maturation process between MACT and MFX techniques over 2 years post-surgery.
• To correlate texture analysis findings with the MOCART 2.0 morphological score.

Main Methods:

• A cohort of 37 patients underwent 3T MRI with T2 mapping at 3, 12, and 24 months post-surgery.
• T2 values and 20 GLCM features were extracted from repair tissue, adjacent tissue, and reference cartilage.
• Statistical analysis compared changes over time and between MACT and MFX groups, correlating with MOCART 2.0 scores.

Main Results:

• GLCM features significantly correlated with the MOCART 2.0 score in both MACT and MFX groups.
• Significant intra-group changes in T2 values and several GLCM features (autocorrelation, dissimilarity, homogeneity, correlation, sum average, information measure) were observed in MACT repair tissue over time.
• MACT repair tissue showed distinct GLCM differences across tissue types at most time points, while MFX showed differences mainly between repair and reference tissue at 12 months.

Conclusions:

• Texture analysis of T2 maps is a valuable addition to quantitative MRI for assessing cartilage repair.
• GLCM texture features provide insights into graft maturation and correlate with morphological outcomes.
• The study reveals differences in the maturation process between MACT and MFX grafts.