Inversion Recovery with Embedded Self-Calibration

Technology #2008-315

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Stephen J. Riederer Ph.D.
Ek T. Tan
Managed By
Seth T. Eisenman
Patent Protection
US Patent Pending

Parallel imaging can be applied to further reduce acquisition times. To do so, coil sensativities have to be determined. One option is to use self-or-auto calibrated methods which in general use unaccelerated sampling in some central region of the otherwise undersampled k-space. However, the fraction of acquisition time devoted to calibration can be substantial, particularly in high acceleration factors, resulting in reduced net acceleration. Although a seperate calibration acquisition may be made, the additional scan time can reduce the overall efficiency of the MRI examination. Means for performing self-calibration while retaining the mominal acceleration factor was devised. The method described, referred to as Inversion Recovery with Embedded Self-calibration acquisitions within the delay intervals of inversion recovery sequences.