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FIG 3. MR images of a patient with recurrent herniated disk
A, Sagittal view unenhanced T2-weighted MR image.
B, Axial view image obtained before the IV administration of ionic contrast medium.
C, Axial view image obtained 5 min after the IV administration of ionic contrast medium.
D, Axial view image obtained 50 min after the IV administration of ionic contrast medium. Contrast ratio is greater after administration of ionic rather than nonionic contrast media at 50 min (see panel G).
E, Axial view image obtained before the IV administration of nonionic contrast medium.
F, Axial view image obtained 5 min after the IV administration of nonionic contrast medium.
G, Axial view image obtained 50 min after the IV administration of nonionic contrast medium. Contrast ratio is greater after administration of ionic rather than nonionic contrast media at 50 min.
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