Motion Measurement using Echoes during SSFP dummy cycles for Whole-Heart MR Coronary Artery
Kuhara S, Kassai Y, Yui M
Toshiba Medical Systems Corporation
A new 2D navigator projection method is proposed using echoes data from the dummy cycles of balanced SSFP to estimate cardiac motion for whole heart MR coronary angiography. The echo data are reconstructed, and then a 2D projection of the imaging slab is obtained from every cardiac cycle until all of actual imaging data is acquired. Translation in the SI and AP directions can be estimated around several regions of the heart from the 2D projection images. The translation was compared with the SI translation of the diaphragm position using conventional 1D navigator.