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Gadolinium-enhanced computed tomographic aortography.

S Chryssidis1, R P Davies, M L H Tie

  • 1Division of Medical Imaging, North West Adelaide Health Service, Queen Elizabeth Hospital Campus, South Australia, Australia.

Australasian Radiology
|April 23, 2002
PubMed
Summary
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Gadolinium-based contrast agents offer a safer alternative to iodinated contrast for computed tomographic aortography (CTA), especially in the thoracic aorta. This case demonstrates successful gadolinium enhancement for diagnosing aortic dissection when iodinated contrast is contraindicated.

Area of Science:

  • Radiology
  • Medical Imaging
  • Contrast Media

Background:

  • Iodinated contrast agents are standard for computed tomographic aortography (CTA).
  • Certain patient populations have contraindications to iodinated contrast agents.
  • Gadolinium-based contrast agents offer a potentially safer alternative with a different photoelectric effect.

Observation:

  • A case of suspected thoracic aortic dissection was evaluated using gadolinium-enhanced CTA.
  • Sufficient aortic enhancement was achieved to confidently rule out an intimal flap.
  • Magnetic resonance imaging (MRI) later confirmed the findings.

Findings:

  • Gadolinium diethylenetriamine penta-acetic acid (Gd-DTPA) provided adequate enhancement of the thoracic aorta.
  • Vascular enhancement decreased below the diaphragm, with minimal tissue enhancement.

Related Experiment Videos

  • The safety profile of gadolinium contrast is advantageous where iodinated contrast is contraindicated.

    • Implications:

    • Gadolinium-enhanced CTA is a viable option for evaluating thoracic aortic dissection when iodinated contrast is contraindicated.
    • Multi-slice CT technology may further expand the utility of gadolinium-based contrast agents in cardiovascular imaging.
    • This approach enhances diagnostic capabilities in specific clinical scenarios, improving patient safety.