Book excerpt: The Third Edition of this popular quick reference features 653 brand-new illustrations and state-of-the-art protocols for brain, spine, and head and neck imaging examinations. The first part presents up-to-date protocols for CT, MRI, myelography, and neuroangiography and guidelines on drugs used in neuroimaging. The second part presents images of all common pathologic entities, along with succinct, bulleted "key facts" about radiologic diagnosis. This edition has new chapters on the brachial plexus, degenerative and iatrogenic brain disorders, and metabolic brain disorders. New entities have been added to many chapters, particularly those on brain trauma, stroke, infections and inflammations, and the orbits.