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Diagnostic Value of Contrast-Enhanced Fluid-Attenuated Inversion Recovery MR Imaging of Intracranial Metastases

Nil Ercana, Serap Gultekina, Halil Celika, Turgut E. Talia, Yusuf A. Onera and Gonca Erbasa

a From the Department of Radiology, Gazi University School of Medicine, Ankara, Turkey



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  		FIG 1. Images obtained in a 57-year-old-man with small-cell lung cancer reveal multiple, enhancing, solid and cystic parenchymal metastases. The number, conspicuity, and contrast enhancement are superior on the postcontrast FLAIR image compared with the postcontrast T1W image. In this patient, FLAIR was performed as the second postcontrast sequence.

A, Contrast-enhanced T1W image.

B, Nonenhanced FLAIR image.

C, Contrast-enhanced FLAIR image.



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  		FIG 2. Images obtained in a 45-year-old-woman with breast cancer. The conspicuity, extension, and contrast enhancement of the lesions are superior on the postcontrast FLAIR image (C) than on the postcontrast T1W image (A). The leptomeningeal enhancement of frontal lobes (white arrow) is not conspicuous in A as compared with C. For this patient, T1W imaging was performed as the second postcontrast sequence.

A, Contrast-enhanced T1W image shows abnormal enhancement in the basal cisterns (arrow) and leptomeninges consistent with metastases.

B, Nonenhanced FLAIR image.

C, Contrast-enhanced FLAIR image also shows the abnormal enhancement of the leptomeninges (white arrow) and basal cisterns (black arrow).



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  		FIG 3. Images obtained in a 54-year-old-man with small-cell lung cancer. In this patient, FLAIR imaging was the second postcontrast sequence.

A and B, Nonenhanced (A) and contrast-enhanced (B) FLAIR images show involvement of the prechiasmal portion of the right optic nerve (white arrow) and extension to the optic chiasm (black arrow) and right optic tract (arrowhead). These findings appear as abnormal hyperintensity in A and as abnormal contrast enhancement in B.

C, Contrast-enhanced T1W image. Although involvement of optic chiasm is shown as abnormal contrast enhancement (arrow), involvement of the right optic nerve and right optic tract could not be detected.





Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X