Accurate localization of needle entry point in interventional MRI

Area of Science:

• Medical Imaging
• Interventional Radiology
• Biomedical Engineering

Background:

• Accurate targeting is essential for interventional magnetic resonance imaging (MRI)-guided biopsies.
• Needle entry points can be located in areas with magnetic field distortions, leading to geometric inaccuracies.
• Current methods for marking needle entry points lack precision.

Purpose of the Study:

• To develop a three-dimensional (3D) coordinate correction method for needle entry points in interventional MRI.
• To improve the accuracy of determining the needle entry point on the patient's skin.
• To address geometric distortions caused by magnetic field inhomogeneity.

Main Methods:

• Development of a 3D coordinate correction algorithm based on needle entry point position.
• Design and implementation of a 2-degree of freedom electromechanical device.
• Utilization of a laser spot for precise needle entry point determination on the skin.

Main Results:

• The proposed 3D correction method accounts for needle entry point location.
• The electromechanical device accurately determines the needle entry point using a laser.
• The system aims to mitigate errors caused by magnetic field distortions.

Conclusions:

• A novel approach for precise needle entry point localization in interventional MRI has been established.
• The developed system enhances accuracy for biopsies, particularly in challenging magnetic field conditions.
• This technology improves patient safety and procedural efficacy in interventional radiology.