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Abstract #1754

Accuracy Evaluation of Phase-Only Cross Correlation (POCC) Guidance Sequence for Real-Time 3T MR-Interventions

Patrik Zamecnik1, Axel Joachim Krafft2, Florian Maier2, Jens Groebner2, Heinz-Peter Schlemmer1, Michael Bock2

1Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany; 2Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany

Recently, an automatic tracking technique using a phase-only cross correlation algorithm (POCC) has been presented, which uses a passive MR marker for real time needle guidance during prostate biopsies or to guide a laser fiber in an experimental thermoablation (LITT) of the liver. In this study the geometric accuracy of the needle guidance using POCC sequence at 3T was tested in a phantom experiment. The accuracy of the procedure proved to be very high. Safe and precise instrument guidance was demonstrated with the automatic tracking sequence during insertion of puncture needle into the target at 3 Tesla conditions.