Computed Tomography Artifact Created by Air in the X-ray Tube Oil.

Computed Tomography Artifact Created by Air in the X-ray Tube Oil.

Hedrick Wayne R; Markovic Michael A; Short James H; Vera Chido D

Journal of computer assisted tomography

2016

2016-02

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.

*Air; *Artifacts; *Phantoms; *Radiographic Image Interpretation; *Tomography; 80 and over; Adult; Aged; Computer-Assisted; Head/diagnostic imaging; Humans; Imaging; Radiation Dosage; X-Ray Computed; Young Adult

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