Stefan Alt1, Reiner Umathum1, Wolfhard Semmler1, Michael Bock1
1Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
An active tracking catheter using a semisolid rubber as signal source was constructed to be used for MRI-guided interventions in air-filled cavities of the body. Exploiting the short relaxation time of the material and providing suppression of interfering signals, a special tracking sequence and algorithm is shown. Results from phantom and animal experiments with a tracking catheter prototype are presented.