MAGNETIC-RESONANCE-IMAGING OF THE ORBIT

Magnetic resonance (MR) imaging plays an important role in evaluation of ocular and orbital lesions. Ocular tumors can be distinguished and delineated from adjacent fluid collections. Demonstration of internal septa within a well-defined mass leads to the diagnosis of cavernous h emangioma, whereas vascularity and internal lobulations are the hallma rk of capillary hemangiomas. MR is the procedure of choice for evaluat ion of the optic nerve sheath complex. It precisely delineates and cha racterizes optic neuritis, optic gliomas, and perioptic meningiomas.