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Real-time MR Guidance for inferior vena cava filter placement in an animal model
A Bücker1, J M Neuerburg, G B Adam
1Clinic for Diagnostic Radiology, University of Technology Aachen, Germany. buecker@rad.rwth-aachen.de
Abstract:
It was the aim of this study to examine the feasibility of real-time magnetic resonance (MR) imaging for MR-guided placement of inferior vena cava (IVC) filters, which were placed in five pigs via a femoral approach. The introducer sheath and dilator were marked with Dysprosium rings. The procedures were performed under MR guidance with use of a 1.5-T ACS-NT imager. Radial filling of k-space in conjunction with the sliding window reconstruction technique achieved real-time MR imaging with a frame rate of 20 images/sec. Simultaneous real-time visualization of the vascular anatomy and interventional instruments was achieved under real-time conditions and allowed correct placement of IVC filters in all five cases as confirmed by radiographic angiography.
Insights
Real-time magnetic resonance (MR) imaging enables precise guidance for placing inferior vena cava (IVC) filters. This study demonstrates the feasibility of MR-guided IVC filter placement in animal models.
Area of Science:
- Medical Imaging
- Interventional Radiology
- Biomedical Engineering
Background:
- Inferior vena cava (IVC) filters are crucial for preventing pulmonary embolism.
- Accurate placement of IVC filters is essential for patient safety and efficacy.
- Current guidance methods may have limitations in real-time visualization.
Purpose of the Study:
- To assess the feasibility of using real-time magnetic resonance (MR) imaging for guiding IVC filter placement.
- To evaluate the effectiveness of MR guidance in achieving accurate filter positioning.
Main Methods:
- Procedures were performed on five pigs using a femoral approach.
- Introducer sheath and dilator were marked with Dysprosium rings for MR visibility.
- Real-time MR imaging was achieved using radial k-space filling and sliding window reconstruction (20 images/sec) on a 1.5-T imager.
Main Results:
- Simultaneous real-time visualization of vascular anatomy and instruments was successful.
- Correct placement of IVC filters was achieved in all five cases.
- Confirmation of accurate placement was obtained via radiographic angiography.
Conclusions:
- Real-time MR imaging is a feasible technique for MR-guided IVC filter placement.
- This method allows for accurate and safe positioning of IVC filters.
- The described technique holds promise for improving interventional radiology procedures.