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Abstract #3115

RF sinc pulse distortion compensation using multiple square pulses at 1 MHz.

Yonghyun Ha1, Kartiga Selvaganesan1, Baosong Wu1, Kasey Hancock1, Charles Rogers III1, Sajad Hosseinnezhadian1, Gigi Galiana1, and R. Todd Constable1
1Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, United States

The response times of RF coils in MRI are long when operating at low B0 field, making it difficult to achieve the desired pulse shape in the coil. Compensation pulses are shown that were optimized using a series of square pulses. Both the duration and amplitude of the compensation elements were calculated with Q-factor which was calculated from the ring-down time measured using a sniffer coil. The SNRs of the echo signal acquired using compensated pulse was compared with those of signal obtained with uncompensated pulses and showed significant improvements of 51.5%.

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