Images generated using: (a–b) conventional acquisition with a short window (=127ms), (c–d) conventional acquisition with an extended window (=270ms), (e–f) and proposed acquisition (= 162 ms, R1=0.4, R2=0.5, R=3, λ =5.0). Note low resolution in (a–b), vessel blurring and motion artifacts in (c–d), and enhanced spatial resolution and reduced motion artifacts in (e–f). Also note that in extending acquisition window, motion artifacts are more severe with a short RR interval in (d) than with a long RR interval in (c).