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Interactive MR-guided biopsy in an open-configuration MR imaging system
S G Silverman1, B D Collick, M R Figueira
1Department of Radiology, Brigham and Women's Hospital, Boston, MA 02115, USA.
Radiology
|October 1, 1995
Summary
New magnetic resonance (MR) imaging techniques enable safe and accurate percutaneous biopsy using frameless stereotaxic guidance. This interactive approach allows for precise needle placement in MR-guided procedures.
Area of Science:
- Medical Imaging
- Interventional Radiology
- Neurosurgery
Background:
- Percutaneous biopsy procedures require precise targeting for diagnostic accuracy.
- Traditional stereotactic systems can be cumbersome and may not integrate seamlessly with all imaging modalities.
- Advancements in open-configuration magnetic resonance (MR) imaging offer new possibilities for image-guided interventions.
Purpose of the Study:
- To introduce and evaluate novel techniques for percutaneous biopsy.
- To utilize an open-configuration MR imaging system with integrated frameless stereotaxic guidance.
- To assess the safety and accuracy of this new MR-guided biopsy approach.
Main Methods:
- A prospective study involving 28 patients undergoing percutaneous biopsy.
- Interactive control of the imaging plane using a hand-held probe attached to the biopsy needle.
- Needle advancement guided by an integrated icon in three orthogonal planes, with in vitro spatial accuracy measurements.
Main Results:
- Diagnostic tissue samples were successfully obtained in 25 out of 28 patients.
- The system demonstrated high accuracy, particularly near the isocenter.
- Maximum measured spatial error was 3.1 mm within a 2.5 cm radius sphere around the isocenter.
Conclusions:
- MR-guided biopsy utilizing a frameless stereotaxic technique is both safe and accurate.
- The system provides near real-time interactive image feedback.
- These techniques hold potential for MR-guided biopsies and the placement of probes for MR-guided therapies.