fig 3.

Compressive neuropathy.

A, Sagittal oblique plane T1-weighted image (680/14/3) reveals marked flattening of the left sciatic nerve (arrow) between hypertrophied obturator internus and gluteus maximus muscles. Note, however, that the transverse fascicular morphology is preserved.

B, Sagittal oblique plane fat-saturated T2-weighted fast spin-echo (6000/102/3; echo train length, 8) image, obtained at the same level as that shown in A, shows abnormally increased sciatic nerve T2 hyperintensity (arrow) that approaches regional vessel signal intensity.