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Contrast-enhanced MR angiography. Methods, limitations and possibilities

M Kouwenhoven1

  • 1Philips Medical Systems, MR Clinical Science, Best, The Netherlands. mKouwenh@best.ms.philips.com

Acta Radiologica. Supplementum
|January 1, 1997
PubMed

Insights

Gadolinium-enhanced Magnetic Resonance Angiography (MRA) utilizes T1 relaxation effects for improved blood signal. This technique offers faster imaging and fewer artifacts compared to conventional MRA.

Area of Science:

  • Radiology
  • Medical Imaging
  • Cardiovascular Imaging

Background:

  • Conventional Magnetic Resonance Angiography (MRA) relies on flow-induced signal changes.
  • Gadolinium-enhanced MRA utilizes T1 shortening effects of the contrast agent.
  • Different MRA techniques impact imaging parameters and image quality.

Purpose of the Study:

  • To compare the principles and outcomes of conventional MRA and gadolinium-enhanced MRA.
  • To highlight the advantages of gadolinium-enhanced MRA regarding speed and artifact reduction.

Main Methods:

  • Review of MRA principles, focusing on signal generation mechanisms.
  • Comparison of imaging techniques, volume orientation, and scanning time.
  • Evaluation of artifact prevalence in both MRA types.

Main Results:

  • Gadolinium-enhanced MRA primarily uses reduced T1 relaxation time for signal enhancement.
  • Conventional MRA relies on flow-induced magnitude and/or phase effects.
  • Gadolinium-enhanced MRA generally demonstrates faster acquisition times and reduced artifacts.

Conclusions:

  • Gadolinium-enhanced MRA offers significant advantages over conventional MRA.
  • The choice of MRA technique influences imaging parameters and diagnostic quality.
  • Gadolinium-enhanced MRA is a valuable tool for vascular imaging.

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