title: Graf/Pen computer for rapid neuroangiographic measurements: Sylvian loops and venous angle.
abstract: The Graf/Pen sonic digitilizer facilitates routine application of neuroradiologic measurements during film interpretation. The Vlahovitch and Probst measurements were performed 23 times faster with this device than manually. The Graf/Pen computer combination shows great potential in the rapid quantitative analysis of both carotid and vertebral angiograms.
mesh_terms: D002339:Carotid Arteries / Q000000981:diagnostic imaging; D002533:Cerebral Angiography / Q000295:instrumentation*; D003936:Diagnosis, Computer-Assisted