Concepts for augmented reality visualisation to support needle guidance inside the MRI.

Area of Science:

• Medical Imaging
• Surgical Navigation
• Augmented Reality

Background:

• MRI-guided interventions require precise instrument navigation.
• Current navigation displays are often separated from the surgical field, hindering hand-eye coordination and interpretation.
• Augmented reality (AR) offers a potential solution for integrated guidance.

Purpose of the Study:

• To evaluate projector-based augmented reality for needle guidance during MRI-guided interventions.
• To compare two distinct AR visualization concepts for needle navigation aids.

Main Methods:

• An accuracy and usability study was conducted with eight participants, including experienced radiologists.
• Two AR visualization concepts for needle navigation were implemented and tested within the MRI bore.
• Performance was assessed based on accuracy, usefulness, and ease of use.

Main Results:

• Both AR visualization concepts demonstrated equal accuracy ($$ and $$).
• Participants found both concepts useful and easy to use, providing clear visual feedback on needle puncture.
• The system offers clear visual feedback on the state and success of needle punctures.

Conclusions:

• Projector-based augmented reality is a viable tool for supporting needle guidance in MRI-guided interventions.
• Further development is needed for dynamic projection on moving surfaces and organ movement tracking for enhanced clinical applicability.
• Feasibility for testing in patients with respiratory arrest is established.