title: A ruler for depth measurements during stereotactic operations. A technical note.
authors: Department of Neurosurgery, University of Bergen School of Medicine, Norway.
authors: E O
authors: EO
authors: Backlund
mesh_terms: D001921:Brain / Q000473:pathology; D001927:Brain Diseases / Q000473:pathology / Q000601:surgery*; D002508:Cephalometry / Q000295:instrumentation; D003399:Craniotomy / Q000295:instrumentation*; D006801:Humans; D013238:Stereotaxic Techniques / Q000295:instrumentation*; D013525:Surgical Instruments