Figure 1.

Pulse sequence diagram for self-respiratory gated cine SSFP acquisition. a) the Self-Nav acquisition is positioned after the slice encoding to allow the acquisition of an entire k_z line (k_x = k_y = 0) in one cardiac phase. b) for each cardiac phase all slice encodings k_z are acquired simultaneous with a set of slice encoded Self-Nav data, which is then Fourier transformed to obtain a projection of the imaging volume onto the slice axis, followed by a center-of-mass calculation and a temporal band-pass filtering operation (ZIP). The phase encode (k_y) is kept constant through the entire R-R interval. In the free-breathing experiments, each phase encode k_y was acquired repeatedly during a subject-specific number of successive RR intervals (shown here is 3) for retrospective respiratory gating