By Martin R. Prince MD, PhD, Thomas M. Grist M.D., Jörg F. Debatin M.D., MBA (auth.)
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Extra resources for 3D Contrast MR Angiography
The nitinol frame filaments of the stentgrafts were identifiable on the individual sections and reformations as distinct areas of signal void, allowing for a detailed assessment of stent structure. The stented lumen could be assessed sufficiently to exclude the presence of a hemodynamically significant (>50% luminal narrowing) stenosis. Similarly, no artifact was seen with the Vanguard AAA Stents. It thus seems that the luminal patency of selected commercially available plain and covered stents can indeed be assessed with 3D contrast MRA.
Targeted MIP (b) reconstructed in the sagittal plane provides even better defineation of the arch vessel origins. Diagnosis: Normal thoracic aorta. Submitted by Martin R. , Ann Arbor, MI. tain particularly slow flow, it is important to anticipate a long contrast travel time to fill the entire aorta. In addition, slow flow in the false lumen of a dissection also needs to be considered. The need for timing sequences can be eliminated if very fast time-resolved techniques are employed. These are becoming increasingly available.
9) is helpful as it allows precise infusion of paramagnetic contrast using predefined weight-adjusted rates and volumes. Saline flush is available not only to keep the venous access open (KVO-mode), but also to advance the contrast column through the veins of the arm into the superior vena cava without any delay following the co nt rast bolus. These features are important for fast breath-hold data acquisition strategies. With the help of apower injector, contrast application protocols can be precisely set for each patient.
3D Contrast MR Angiography by Martin R. Prince MD, PhD, Thomas M. Grist M.D., Jörg F. Debatin M.D., MBA (auth.)