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[MRI-assisted bile duct drainage: evaluation of passive catheter imaging in an animal model]
F Wacker1, G Branding, A Wagner
1Abteilung für Radiologie und Nuklearmedizin, Klinikum Benjamin Franklin der Freien Universität Berlin, Deutschland. wacker@ukbf.fu-berlin.de
Purpose:
To investigate interactive MR-assisted bile duct drainage in pigs with the passive visualization technique using near real-time imaging.
Methods:
8 bile duct drainages were placed in an open low-field MR system (0.2 Tesla) in 4 pigs with surgically induced cholestasis. After planning the intervention with magnetic resonance cholangiography (MRC), both the puncture and catheter placement were interactively guided using a fast T2-weighted true FISP sequence.
Results:
MRC enabled interventional planning in all puncture attempts. Punctures were unproblematic in all attempts, the bile ducts were punctured 6 times after the first and twice after the second attempt. Placement of the passively visible catheter was successful in all animals. The applied sequence enables interactive fluoroscopy-like positioning of the devices.
Conclusion:
The procedure introduced here enables reliable and fast placement of a bile duct drainage in an animal model using a low-field MR system.