(a) Left: circular ROI drawn for calculation of FA and MD/ADC values on diffusion FA map above the site of lesion (SOL). Middle: corresponding T2 axial MRI image shows no disease above the SOL. Right: once circular ROIs were drawn, FA and MD values were generated which were recorded. Three such ROIs were drawn above the SOL. (b) Left: circular ROI drawn at the SOL. Middle: corresponding axial MRI image shows disease and compression on cord. Right: FA and MD values generated in the same color as ROI. Note: The first three values are for above the SOL. (c) Left: circular ROI drawn below the SOL. Middle: the corresponding axial MRI image shows no disease. Right: FA and MD values generated. Values (1–3) – above SOL (4–6) – at SOL (7–9) – below SOL.