Optimized Parameters of Diffusion-Weighted MRI for Prediction of the Response to Neoadjuvant Chemoradiotherapy for Locally Advanced Rectal Cancer

Figure 4

A 68-year-old man with bloody stool for more than 2 months. (a, b) Baseline conventional MRI before treatment. (c, d) Conventional MR images after treatment. (a) HR-T2WI transverse axial image shows marked uneven thickening of the rectal wall. (b) Axial DWI image shows increased DWI signal of the thickened intestinal wall, with an ADC value of 0.82 × 10⁻³ mm²/s. (c) HR-T2WI transverse axial image shows edema of the rectal wall and increased signal intensity. (d) Axial DWI image shows that the DWI signal of the intestinal wall is significantly lower than before, with an ADC value of 1.11 × 10⁻³ mm²/s.

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