We propose a new monitoring scheme that enables simultaneous measurements of the complete scattering matrix of a pTx coil during image acquisition by modifying the RF-pulse without prolonging the image sequence and without spin distortion. We show that the use of this monitoring schemes and the measured scattering matrix enable a higher SNR in the estimated cardiac scattering signal, than using RF-reflection of the normal imaging pulse as in previous work. Preliminary results in 7T MRI are shown with successfully, retrospectively gated 2D-CINE images using the proposed method.
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