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Abstract #1653

Enabling Pilot Tone cardiac triggering for complete cardiac examinations using an RF calibration procedure

Peter Speier1, Yan Tu Huang2, Carmel Hayes1, Randall Kroeker1, Manuela Rick1, Michael Schwertfeger3, and Mario Bacher1
1Siemens Healthcare, Erlangen, Germany, 2Siemens Healthcare, Shenzen, China, 3ASTRUM IT GmbH, Erlangen, Germany


Contactless cardiac triggering using Pilot Tone was initially demonstrated for steady-state triggered cine-type sequences that, per definition, are performed with continuous, uniform RF pulses. Here we describe a method that stabilizes Pilot Tone cardiac triggering in the presence of RF artefacts, thereby allowing for pilot tone triggering of complete cardiac MR examinations with a range of sequence flavors including those applying RF pulses intermittently. The method uses an additional RF calibration measurement and avoids the RF artefact subspace in a PCA-based multi-channel coil combination calculation. Signal examples at 1.5T demonstrate effective RF suppression.

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