Abstract: Provided herein are magnetic resonance imaging (MRI) compatible, convection-enhanced delivery (CED) cranial implant devices and related methods for performing a wide array of therapeutic and/or monitoring applications. In one aspect, the cranial implant device includes a cranial implant housing configured for intercranial implantation in a cranial opening of a subject. The cranial implant housing comprises a substantially anatomically-compatible shape, at least first and second surfaces, and at least one fluidic circuit comprising at least one cavity and at least one port that fluidly communicates with the cavity through at least the second surface, in which the cavity comprises, or is capable of comprising, at least one fluidic therapeutic agent.