Suguru Yokosawa1, Yo Taniguchi1, Yoshitaka Bito1
1Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo, Japan
We have proposed two VFA schemes to reduce the SAR while maintaining both the SNR and image contrast for both gated and non-gated SSFP imaging. The main idea of the technique is to use a high flip angle for echoes around the center of a k-space and at times prior to when the echo for the center was obtained. We examined the SNR and contrast of the healthy volunteer images by comparing a VFA scheme to a constant flip angle scheme. The results show that the proposed schemes reduced the SAR by 30% while maintaining the SNR and image contrast.