Magnetic Resonance Angiography in the Abdomen and Pelvis
The magnetic resonance (MR) experiment is exquisitely sensitive to flow. Motion affects both Tl and T2 relaxations; the former is referred to as “time-of-flight” and the latter as “spin phase” effects. While these motion phenomena can cause considerable artifacts in conventional MR imaging, they can be exploited to form the basis of what is generally referred to as MR-angiography (MRA). Due to motion-induced signal modulation, vessels with flowing blood acquire a signal that can be differentiated from surrounding stationary tissues. MRA techniques use this signal contrast between vessels and stationary tissues for the non-inva-sive assessment of both vascular morphology and function.
KeywordsInferior Vena Cava Magnetic Resonance Angiography Spin Echo Portal Venous System Ovarian Vein
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