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. 2005 Oct;26(9):2187–2199.

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Fig 5. — A 51-year-old man with cystic METs from lung carcinoma located in right temporal lobe.

A, Axial T2-weighted spin-echo image (2295/90), shows hyperintense cystic mass with peritumoral edema and/or infiltration (arrows).

B, Axial contrast-enhanced T1-weighted image (583/15) reveals an irregularly ringlike enhancing mass without any peritumoral contrast enhancement (arrows).

C, Gradient-echo axial perfusion MR image (627/30) with rCBV color overlay map shows a high rCBV_T value of 3.05 but low rCBV_P value of 1.05, which is consistent with METs. No rCBV increase is present on peritumoral area (arrows).

D, Time-signal intensity and gamma-variate fitted curves from tumoral (red), peritumoral (green), and normal (blue) areas show prominent decrease in signal intensity from tumoral area. Decreased signal intensity in peritumoral area is at least equal to or less than that of normal gray matter.