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[Real-time MRI with radial k-radial scanning technique for control of angiographic interventions]
A Bücker1, G Adam, J M Neuerburg
1University of Minnesota, Minneapolis, USA. buecker@rad.rwth-aachen.de
Purpose:
To test the feasibility of real-time MR controlled guidance of field-inhomogeneity catheters in vitro and in vivo as a first step to MR-guided angiographic interventions.
Methods:
Applying a combination of radial scanning with the sliding window reconstruction technique, a frame rate of 23 low resolution images per second was achieved. Field inhomogeneity catheters were steered through a flow phantom and into the renal arteries of a pig.
Results:
It was possible to visualize flow or, respectively, vessels and to depict catheter movements. This enabled real-time MR-guidance of the catheter into the renal arteries of the flow phantom and into those of the pig.
Conclusions:
The new technique yields a sufficiently high temporal resolution for MR-guidance of catheters through vessels.