A dual-nuclear interleaved 23Na/1H MRI sequence for cardiac MRI was implemented and evaluated in phantom and in vivo measurements using a 23Na body coil in combination with two 4 Tx/8 Rx 1H arrays. The 1H arrays were operated in 1Tx mode with fixed transmit magnitude/phase setting. Compared to single-nuclear sequences, the interleaved sequence led to almost identical SNR und image intensities in phantom measurements. Furthermore, the feasibility of interleaved 23Na/1H in vivo MRI measurements at 7 T was demonstrated. The interleaved approach enables reduced acquisition times and further eliminates the need for image co-registration.
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