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[Interventional magnetic resonance imaging--non-invasive imaging for interventions].
A Bücker1, G Adam, J M Neuerburg
1Universitätsklinik für Radiologische Diagnostik, Medizinische Fakultät, Rheinisch-Westfälischen Technischen Hochschule Aachen. buecker@rad.rwth-aachen.de
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|March 21, 2000
Summary
Magnetic Resonance (MR)-guided interventions require instruments visible in MR images. Optimizing imaging sequences and hardware enables precise guidance for both non-vascular and vascular procedures, enhancing patient care without ionizing radiation.
Area of Science:
- Medical Imaging
- Interventional Radiology
- Magnetic Resonance Imaging (MRI)
Context:
- MR-guided interventions necessitate clear visualization of instruments without anatomical distortion.
- Imaging speed requirements vary: seconds for non-vascular, real-time for vascular interventions.
- High spatial resolution, contrast, and patient access are critical for MR scanners.
Purpose:
- To review the requirements and current status of MR-guidance for interventional procedures.
- To discuss sequence optimization (gradient echo vs. spin echo, echo time, phase encoding) for instrument depiction.
- To highlight the feasibility and advancements in both non-vascular and vascular MR-guided interventions.
Summary:
- Optimizing MR imaging sequences and hardware is crucial for visualizing instruments during interventional procedures.
- Non-vascular interventions (biopsies, drainage) are feasible across various field strengths (0.064 T to 1.5 T).
- Vascular interventions (dilatation, stenting) are advancing with dedicated devices and real-time MR strategies.
Impact:
- MR-guided interventions offer advantages like superior soft tissue contrast, multiplanar imaging, and flow measurement.
- This technology eliminates ionizing radiation, improving patient safety.
- Interventional MRI is poised to become a standard clinical tool with significant potential.