Radioanatomy Magnetic Resonance Imaging (MRI) |
MRI is seldom used to study the mesentery since currently, its spatial resolution is inferior to that of CT or US. In addition, MRI is still strongly hampered by respiratory artefacts. On the other hand, MRA is an attractive technique of investigation for vessels because it avoids direct injection of a iodized contrast media. So, in most of "diagnosis" indications, MRA progressively replaces the traditional angiography.
Technique :
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Results :
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a) T1. Fat is hypersignal ; vessels and lymph nodes in hyposignal.(no injection) b) Gadolinium enhanced T1 sequence with fat suppression (fat is hyposignal improving the vascular contrast) |