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MR-guided cholecystostomy: Assessment of biplanar, real-time needle tracking in three pigs

Abstract

Purpose

To demonstrate the feasibility of magnetic resonance (MR)-guided cholecystostomy using active, real-time, biplanar MR tracking in animal experiments.

Methods

Experiments were performed on three fully anesthetized pigs in an interventional MR system (GE open). The gallbladder was displayed in two orthogonal planes using a heavily T2-weighted fast spin-echo sequence. These “cholangio roadmaps” were displayed on LCD monitors positioned in front of the interventionalist. A special coaxial MR-tracking needle, equipped with a small receive-only coil at its tip, was inserted percutaneously into the gallbladder under continuous, biplanar MR guidance. The MR-tracking sequence allowed sampling of the coil (needle tip) position every 120 msec. The position of the coil was projected onto the two orthogonal “cholangio roadmap” images.

Results

Successful insertion of the needle was confirmed by aspiration of bile from the gallbladder. The process of aspiration and subsequent instillation of Gd-DTPA into the gallbladder was documented with fast gradient-recalled echo imaging.

Conclusion

Biplanar, active, real-time MR tracking in combination with “cholangio roadmaps” allows for cholecystostomies in an interventional MRI environment.

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Göhde, S.C., Pfammatter, T., Steiner, P. et al. MR-guided cholecystostomy: Assessment of biplanar, real-time needle tracking in three pigs. Cardiovasc Intervent Radiol 20, 295–299 (1997). https://doi.org/10.1007/s002709900154

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  • DOI: https://doi.org/10.1007/s002709900154

Key words

  • MR-cholangiography
  • Interventional MRI
  • Cholecystostomy
  • MR tracking