Fig. 3: Miniature rigid magnetic tracker.
From: Nuclear magnetic resonance for wireless magnetic tracking
a The magnetic guidewire has a 0.6 mm diameter and a spring steel tracker that is 2 mm (0.565 mm3). b The wireless magnetic tracking with NMR inside a porcine brain ex vivo. c The tracking data in the oblique plane MR image. The tracker positions are overlaid with red dots. d The 3D image tracking data overlayed on the MR image in the sagittal plane with respect to the sensor plane.
