Saturation recovery single-shot acquisition (SASHA) for T 1 mapping in the human heart at 7T

We recently reported normal myocardial T1s at 7T, using the ShMOLLI+IE sequence on a scanner with 16x1kW RF channels. We now introduce the 7T SASHA variant of the saturation recovery single-shot acquisition (SASHA) sequence for use on scanners with only 8x1kW RF. In phantoms, 7T SASHA T1s were within 6% of IR-SE reference T1s for readout FAs≤25. In 10 volunteers, native 7T SASHA T1s in the septum were 193973ms and 999-1674ms after Dotarem contrast. These values are consistent with our ShMOLLI+IE T1 of 1925 48 ms. 7T SASHA paves the way for clinical applications of T1 mapping at 7T.

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