Arachnoid Cyst of the Posterior Cranial Fossa: (Left) T1-weighted axial MRI; (Right) T2-weighted axial MRI. Note the large cystic lesion in the posterior fossa. As the cyst contains fluid, it is dark ...
Metastatic Brain Tumor (Breast Cancer): (Left) T2-weighted axial MRI; (Middle) T1-weighted axial MRI; (Right) T1-weighted with gadolinium axial MRI. Note the well-defined nodular mass in the left ...