Abstract
The use of magnetic resonance imaging (MRI) contrast agents should be minimized in MR angiography. Overview of existing native MRI techniques for MR angiography MATERIAL AND METHODS: Native MRI angiography uses the fact that unsaturated flowing blood is hyperintense to static tissue (time-of-flight MRA), that blood flow induces adetectable phase shift (phase contrast MRA), that labeling by selective inversion can dynamically image abolus passage (arterial spin labeling) and that special MRI sequences exist which utilize the contrast properties of blood. Native MRI angiography, if properly selected, can reliably delineate vessels such as cerebral arteries and coronary arteries and can provide additional information about the flow dynamics.
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