Fig. 5.
Comparison of images of the three sequences (poor breath-hold case). (a) Cartesian liver acquisition with volume acceleration with navigator echoes (Cartesian LAVAnavi+), (b) stack-of-stars LAVA without navigator echoes (LAVA Starnavi−), and (c) stack-of-stars LAVA with navigator echoes (LAVA Starnavi+). These are the images of a 65-year-old man with poor breath-hold. In this case, the Cartesian LAVAnavi+ image showed respiratory motion artifact; however, motion artifacts were not observed in the LAVA Star sequences regardless of the use of navigator echoes. The image quality of LAVA Starnavi+ was the best in this case. It is assumed that LAVA Star sequence is less likely to be affected by respiratory motion.