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Normal contrast enhancement of extraocular muscles: fat-suppressed MR findings
1Department of Radiology, Nippon Medical School, Tokyo, Japan.
Purpose:
To evaluate contrast enhancement of normal extraocular muscles in the orbit.
Methods:
Noncontrast and contrast-enhanced T1-weighted images of the orbit were acquired using a fat-suppression MR technique in eight patients with no orbital disease. Contrast enhancement of 64 extraocular muscles was evaluated and compared with that of 16 temporal muscles.
Results:
Compared with temporal muscles, all extraocular muscles markedly enhanced after administration of contrast material.
Conclusions:
Because normal extraocular muscles enhanced markedly with contrast material, more attention should be paid to these muscles when using contrast-enhanced, fat-suppressed T1-weighted MR imaging to evaluate pathologic conditions.