Disclosed is a new propeller EPI pulse sequence with reduced sensitivity
to field inhomogeneities is proposed. Image artifacts such as blurring
due to Nyquist ghosting and susceptibility gradients are investigated and
compared with those obtained in previous propeller EPI studies. The
proposed propeller EPI sequence uses a readout that is played out along
the short axis of the propeller blade, orthogonal to the readout used in
previous propeller methods. In contrast to long-axis readout propeller
EPI, this causes the echo spacing between two consecutive phase-encoding
(PE) lines to decrease, which in turn increases the k-space velocity in
this direction and hence the pseudo-bandwidth.