title: Computed Tomography Artifact Created by Air in the X-ray Tube Oil.
abstract: A subtle artifact of patchy hypodensities in computed tomography images of the head mimicked acute or subacute cerebral infarct. The cause of the artifact was air in the oil of the x-ray tube. The artifact manifested only when the acquisition parameters included a rotation time of 0.5 second and a gantry tilt angle of 11 to 20 degrees. Routine quality control testing did not detect nonuniformities in the water phantom.
authors.affiliation: From the Radiology Department, Aultman Hospital, and Northeast Ohio Medical University, Rootstown, OH.
authors.forename: Wayne R
authors.initials: WR
authors.lastname: Hedrick
authors.forename: Michael A
authors.initials: MA
authors.lastname: Markovic
authors.forename: James H
authors.initials: JH
authors.lastname: Short
authors.forename: Chido D
authors.initials: CD
authors.lastname: Vera
mesh_terms: D000328:Adult; D000369:Aged, 80 and over; D000388:Air; D016477:Artifacts; D006257:Head / Q000000981:diagnostic imaging; D006801:Humans; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011857:Radiographic Image Interpretation, Computer-Assisted; D014057:Tomography, X-Ray Computed; D055815:Young Adult