USE OF MEASUREMENTS MADE IN ONE ECHO TRAIN TO CORRECT RINGING IN SECOND TO AVOID USE OF PHASE ALTERNATED PAIR IN THE SECOND

摘要

Estimates of ringing produced by short recovery pulse sequences (CPMG ormodified CPMG) are used to improve the effects of ringing in a conventionalCPMG or modified CPMG sequences. This is an effective method for removal ofringing when the ringing is varying over a time interval that would be spannedby a phase alternated pair of conventional sequences. By use of frequencydithering, ringing due to the excitation pulse and the refocusing pulses canbe removed.