Magnetic resonance imaging of the brain metastasis. Above, representative axial and coronal T1-weighed gadolinium-enhanced Magnetic resonance imaging (MRI) slices of the brain at the time of seizure. White arrow: brain tumor. The images reveal a 45-mm mass on the right side of the brain. Below, axial and coronal T1-weighed gadolinium-enhanced MRI slices, taken 6 months post-operation. Black arrow: post-treatment change after operation.