title: Comments on: "Exact determination of the magnification factor for target lesions in a stereotactic frame".
authors.affiliation: Anne Arundel Oncology Center, Annapolis, Maryland 21401.
authors.forename: R L
authors.initials: RL
authors.lastname: Siddon
mesh_terms: D008433:Mathematics; D008962:Models, Theoretical; D013238:Stereotaxic Techniques / Q000295:instrumentation*