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FIG 3. Tumor in the right occipital lobe, metastasized from the lung.
A, On a T2-weighted image, the solid portion of the tumor is mildly hyperintense, and peritumoral edema is present anterior to the tumor.
B, Tumor shows relatively homogeneous enhancement after injection of contrast medium.
C, On DWI, the solid portion of the tumor is isointense to mildly high in intensity.
D, Regions of interest are shown (small circles) on the ADC map. The ADC values are 0.80, 0.74, 0.68, and 0.67, and the averaged ADC value is 0.72. Apparent restricted diffusion (high signal) in the tumor periphery appears to reflect T2 shine-through effect, although peripheral high intensity is not seen on the T2-weighted image.
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