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[Magnetic resonance angiography].

H J Smith1

  • 1Røntgen-Radiumavdelingen, Rikshospitalet, Oslo. h.j.smith@rh.uio.no

Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke
|May 5, 2000
PubMed
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Magnetic Resonance Angiography (MRA) offers non-invasive imaging of blood vessels. Advanced MRA techniques are becoming comparable to traditional angiography, with potential to replace it for many diagnostic procedures.

Area of Science:

  • Radiology
  • Medical Imaging
  • Cardiovascular Imaging

Background:

  • Magnetic Resonance Angiography (MRA) encompasses MRI techniques for non-invasive visualization of arteries and veins.
  • MRA avoids ionizing radiation and the need for catheterization, offering a safer alternative to conventional angiography.

Purpose of the Study:

  • To review key MRA techniques, including Time-of-Flight (TOF), Phase Contrast (PC), and contrast-enhanced MRA.
  • To highlight the applications and advantages of MRA in various vascular territories.

Main Methods:

  • Discussion of Time-of-Flight (TOF) MRA and Phase Contrast (PC) MRA, which utilize blood flow phenomena for vessel enhancement.
  • Explanation of contrast-enhanced MRA, involving intravenous contrast media administration.
  • Emphasis on the non-nephrotoxic nature of MRA contrast agents, suitable for patients with renal impairment.

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Main Results:

  • MRA demonstrates high sensitivity and specificity across various indications, approaching the performance of X-ray angiography.
  • Contrast-enhanced MRA is a viable option for patients with compromised renal function.
  • MRA is clinically indicated for imaging of head and neck, thoracic, abdominal, and lower extremity vasculature.

Conclusions:

  • MRA is rapidly evolving, with diagnostic accuracy rivaling the gold standard in many applications.
  • MRA is poised to become the predominant method for diagnostic angiographic procedures in the near future.