The measurement of R1rho (1/T1rho) spectrum and its asymmetry have several advantages over Chemical Exchange Saturation Transfer (CEST) to probe chemical exchange effect. Previously reported AC-iTIP approach is able to obtain R1rho-spectrum and R1rho asymmetry robustly. However, it suffers from long scan time. In this work, we proposed a new AC-iTIP approach to reduce the scan time by approximately 30%~40%, without compromising the robustness.
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