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Egyptian Journal of Radiology and Nuclear Medicine
Fig. 2 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 2

From: Arterial spin-labeled magnetic resonance perfusion imaging in prediction of pediatric brain tumors grading: inter-observer agreement

Fig. 2

A 14-year-old girl patient with a WHO grade I pilocytic astrocytoma. Images show a well-defined cystic lesion in the right cerebellar hemisphere with internal septae and solid mural nodule. It displays low signal intensity on axial T1WI (A) with enhancing mural nodule on post contrast axial T1WI image (B). It displays high SI of the cystic part with intermediate SI of the mural nodule on sagittal T2WI (C). Free diffusion of the lesion is seen in the form of low SI on DWI (b1000 image) and high SI on axial ADC grayscale map (D, E). Hypo-perfusion of the cystic parts with small area of hyper-perfusion (white arrows) corresponding to the solid mural nodule is seen in the axial ASL grayscale and color CBF maps (F, G)

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