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Related Experiment Videos

Multi-detector row CT artifacts that mimic disease.

Dianna D Cody1, Donna M Stevens, Lawrence E Ginsberg

  • 1Division of Diagnostic Imaging, University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA. dcody@mdanderson.org

Radiology
|August 2, 2005
PubMed
Summary
This summary is machine-generated.

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Regularly repeating artifacts mimicking lesions can occur on multi-detector row CT head scans. Routine detector assessment is recommended to prevent misinterpretation of these axial mode CT artifacts.

Area of Science:

  • Radiology
  • Medical Imaging
  • Neuroradiology

Background:

  • Computed tomographic (CT) head imaging is crucial for diagnosing neurological conditions.
  • Multi-detector row CT (MDCT) systems offer improved imaging speed and resolution.
  • Artifacts in CT scans can mimic pathological findings, leading to misdiagnosis.

Purpose of the Study:

  • To determine the frequency of two specific artifact patterns on axial mode MDCT head images.
  • To identify artifacts that mimic pathological lesions using two different MDCT systems.

Main Methods:

  • Retrospective analysis of CT head images from 35 patients (22 on system 1, 13 on system 2).
  • Evaluation by a neuroradiologist and physicist for artifact presence, appearance, location, and size.

Related Experiment Videos

  • Verification of artifact elimination after scanner service and repair using a water phantom.

    • Main Results:

    • Artifacts were identified in 4/22 patients with the first scanner and 8/13 patients with the second scanner.
    • Distinct artifact patterns were observed, mimicking lesions like pseudocysts.
    • Artifacts occurred regularly at the gantry isocenter on every fourth image and resolved after system adjustments.

    Conclusions:

    • Axial mode MDCT can produce repeating artifacts when detector data are compromised.
    • These artifacts pose a risk of misinterpretation as pathological lesions.
    • Routine assessment of each detector element in MDCT scanners is recommended.