16.All
are features of herniated disc except
a. focal contour abnormality along the
posterior disc margin
b. may
displace the epidural fat, nerve root, epidural veins, or thecal sac
e. Herniated
discs typically have very low signal intensity on sagittal and axial
T2-weighted FSE images
e. Nerve
root and thecal sac compression are well shown on T1-weighted SE images,
particularly in the axial plane
16.---d
On GRE images, it is difficult to
visualize the herniated disc in the epidural space because the signal intensity
of fat and disc material is similar. However, annular tears may be better seen
with FSE or GRE sequences . GRE images show bone abnormalities better than do
conventional 
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