Navigator Filtering Using Principal Component Analysis.

Sergio Andres Uribe Arancibia¹, Philipp Batchelor¹, Claudia Prieto¹, Reza Razavi¹, Tobias Schaeffter¹

Cardiac MR usually requires either navigator echoes or k0 profiles to monitor diaphragm position. Unwanted signals that interfere navigator projections may lead to an incorrect respiratory motion. In this abstract we propose a novel method for filtering navigator projections using a singular value decomposition. The method cleans the projections rather than a derived respiratory signal. Results showed unwanted noise was removed from the projections leading to a robust respiratory motion detection.