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[Dissection-like artifact on one-second scanning time CT]

K Nasu1, H Fujimoto, S Yamamoto

  • 1Department of Radiology, Numazu City Hospital.

Nihon Igaku Hoshasen Gakkai Zasshi. Nippon Acta Radiologica
|September 1, 1995
PubMed
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Dissection-like artifact (DLA) on CT scans appears in the ascending aorta, superior vena cava, and right pulmonary artery. Its presence suggests the absence of severe cardiac impairment in patients.

Area of Science:

  • Radiology
  • Cardiovascular Imaging
  • Medical Artifacts

Background:

  • Dissection-like artifact (DLA) is an imaging finding on CT scans.
  • It is typically observed in the ascending aorta, and less frequently in the superior vena cava and right pulmonary artery.

Purpose of the Study:

  • To evaluate the frequency and location of DLA on thoracic CT scans.
  • To investigate the potential causes of DLA and its association with cardiac function.

Main Methods:

  • Analysis of 136 thoracic CT cases, including 20 with heart failure.
  • Systematic examination of DLA occurrence in various great vessels.

Main Results:

  • DLA was identified in the ascending aorta in 99 cases.

Related Experiment Videos

  • The artifact extended to the superior vena cava in 26 cases and the right pulmonary artery in 10 cases.
  • DLA was absent in patients with heart failure and other great vessels like the descending aorta.

    • Conclusions:

    • Pulsation of the ascending aorta and pulmonary artery is the presumed cause of DLA.
    • The presence of DLA indicates that patients likely do not have severe cardiac impairment.