Axial perfusion Subclavian steal - 2D phase contrast coronal and axial images, three 1 cm thick slabs with directional imaging. For melanoma and hemorrhagic metastases, add axial MPGR susceptibility sequences. For tumor versus radiation necrosis, optional perfusion. If a meningioma is adjacent to a dural sinus, MR venography should be performed to evaluate for patency of the sinus. Do brain with gado if patient doesn't already have an outside scan.
Coronal localization depends on location of lesion.
If AVM is not obvious, may want to give gado, optional 3d TOF MRA, optional axial perfusion Cavernous malformation- Hemorrhage protocol. Give gado if you are trying to differentiate between tumor and unusual cavernous malformation or to look for adjacent venous malformation. If you are unable to obtain all sequences for children less than 2, the most important scans are axial T1, axial SE PD and axial SE T2. Give gado if there appears to be a mass. CSF flow - CSF flow protocol rarely requested for aqueductal stenosis or Chiari malformation.