Simultaneous 3D Tracking of Multiple 19F Labeled Capsules using a 3D Golden Angle Sampling Scheme

Tobias Hahn¹, Andreas Steingoetter^1,2, Werner Schwizer², Martin Buehrer¹, Sebastian Kozerke¹, Peter Boesiger¹

Tracking of single fluorine labeled markers or capsules has previously been performed for gastrointestinal and catheter tracking applications using three orthogonal projections. For these applications, simultaneous fast tracking of multiple capsules is highly desirable. However, for multiple capsule tracking three orthogonal projections are not sufficient anymore for unambiguous capsule position detection. Therefore, in this work the use of a radial sampling scheme with 3D Golden Angle projections for simultaneous multiple capsule tracking is studied. Simultaneous tracking of four capsules with velocities < 13.5 mm/s using different reconstruction window sizes is found feasible with good tracking reliability.