Methods for providing probe position and temperature information on MR images during interventional procedures

Area of Science:

• Medical imaging
• Interventional radiology
• Software development

Background:

• Interventional magnetic resonance imaging (MRI) guides procedures using MR images.
• Accurate real-time guidance of interventional devices is crucial for minimally invasive therapies.
• Monitoring thermal ablation requires visualizing temperature changes during procedures.

Purpose of the Study:

• To develop a prototype graphical user interface and software methods for interventional MRI.
• To enable accurate overlay of interventional devices onto MR images.
• To facilitate the monitoring of thermal ablation procedures through temperature mapping.

Main Methods:

• Developed software to overlay rigid interventional device representations onto MR images using spatial position and orientation.
• Implemented "virtual tip tracking" for real-time probe tip location display.
• Designed a method for displaying and overlaying temperature maps from temperature-sensitive MR acquisitions.

Main Results:

• Successfully overlaid virtual representations of interventional devices onto MR images.
• Enabled "virtual tip tracking" without extra hardware or "road map" images.
• Facilitated real-time monitoring of probe position and temperature changes during procedures.

Conclusions:

• The developed software methods enhance interventional MRI by providing rapid graphical updates.
• These tools aid physicians in guiding procedures like biopsies and thermal ablation.
• The system integrates seamlessly without altering standard MR imager operation.