[MR-guided coil embolisation of renal arteries in an animal model].
OBJECTIVE
To test the feasibility of MR-guided coil embolization with passive visualization in an animal model.


METHODS
All experiments were performed on a 1.5 T interventional MR-scanner (Gyroscan ACS-NT, Philips, Netherlands). A gradient echo sequence was combined with radial k-space acquisition and sliding window reconstruction technique to calculate the raw data with a specially designed back projector, yielding a frame rate of 20 images per second. The images were directly displayed on LCD-screens next to the MR scanner. A multipurpose catheter with dysprosium markers was placed into the renal arteries of two pigs under MR guidance, and a nitinol coil and platinum coil each were deployed. The position of the coils was verified with magnetic resonance angiography and conventional angiography.


RESULTS
MR-guided catheterization of renal arteries with subsequent coil embolization was successfully carried out but the configuration of the coils could not be visualized on the MR images.


CONCLUSIONS
MR-guided coil embolization of renal arteries is feasible. Exact guidance of coil deployment is not attainable with passive visualization.
Bücker
A
A
Klinik für Radiologische Diagnostik, Medizinische Fakultät der Rheinisch-Westfälischen Technischen Hochschule Aachen. buecker@rad.rwth-aachen.de
Neuerburg
J M
JM
Adam
G
G
Glowinski
A
A
van Vaals
J J
JJ
Günther
R W
RW
D015901:Angiography, Digital Subtraction; D000818:Animals; D004621:Embolization, Therapeutic; D005240:Feasibility Studies; D018810:Magnetic Resonance Angiography; D012077:Renal Artery / Q000473:pathology*; D012680:Sensitivity and Specificity; D013552:Swine