Fig. 3.

MRI depiction of parenchymal lung motion.

A. Patient with solitary non-small cell lung cancer in upper right lung.

B. Using simple vector field representation for one time frame of breathing cycle, limited lung motion in right upper lung can hardly be seen.

C. Using color map representation of breathing cycle, from maximum expiration to maximum inspiration, limited asymmetric lung motion can clearly be seen. In this patient, overall lung motion was limited because of limited lung function.