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Contrast-enhanced MR angiography. Methods, limitations and possibilities
1Philips Medical Systems, MR Clinical Science, Best, The Netherlands. mKouwenh@best.ms.philips.com
Acta Radiologica. Supplementum
|January 1, 1997
Summary
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.