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The encoding adopted inversion recovery (IR) prepared interleaved multi\u2010slice acquisition with optimized inter\u2010slice gap to ensure a uniform excitation of the middle slice regardless of through\u2010plane respiratory motion. The flip angles were alternated between the odd and even IR readouts to correct flip\u2010angle errors. SNAC was designed to calibrate the through\u2010plane motion with the respiratory self\u2010navigation signal extracted from the free\u2010running sequence, and integrate the multi\u2010slice data into a through\u2010plane motion\u2010corrected 2D slice for mapping reconstruction. Numerical simulations were performed to optimize the key sequence parameters, followed by phantom and in\u2010vivo imaging to validate the accuracy and repeatability.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n Numerical simulations yielded the dual flip angles minimizing estimation errors and the adjacent slice offset achieving uniformity in the superimposed slice profile. Phantom experiments demonstrated a strong correlation between the proposed and reference method, and no dependence of the free\u2010running estimation on heart rates. Adding through\u2010plane respiratory motion correction significantly improved the in\u2010vivo mapping sharpness and visual quality. Validated against the conventional breath\u2010hold mapping technique, the motion corrected free\u2010running method achieved comparable mapping quality and repeatability.<\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n Respiratory motion is effectively suppressed in the proposed 2D free\u2010running method, which achieves superior mapping with acceptable repeatability in a short scan time of 46\u00a0s.<\/jats:p>\n <\/jats:sec>","DOI":"10.1002\/mrm.70071","type":"journal-article","created":{"date-parts":[[2025,9,5]],"date-time":"2025-09-05T04:20:59Z","timestamp":1757046059000},"page":"756-769","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Rapid free\u2010breathing myocardial\n T<\/i>\n 1<\/sub>\n mapping with free\u2010running interleaved multi\u2010slice acquisition and respiratory motion correction using self\u2010navigated auto 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