Updating Pre-Scan Sensitivity Maps with the Minimum Number of ACS Lines

¹Invivo Corporation, Gainesville, FL, USA

There are advantages to use pre-scann sensitivity maps, such as intensity correction, higher net acceleration factor, etc. However, if there is motion between pre-scan and the target acquisition, then serious aliasing artifacts may occur because of the misregistered sensitivity maps. It is shown in this work that the misregistration can be corrected with as few as 3 extra auto-calibration signal (ACS) lines. The quality of the reconstructed image can be significantly improved with the updated sensitivity maps.