Fig. 7

Temporal evolution of the 3D slow physiological drifts estimated on the 10 healthy volunteers. a, b: Statistical distribution of the magnitude of the 3D motion vectors estimated on the liver and kidneys, pooled from all volunteers, at each 3D anatomical anchor acquisition time point. c, d: Time evolution of the average magnitude of the motion vectors estimated on the liver and kidneys, illustrated individually for each of the 10 healthy volunteers. The abscissa in Fig. a - d provides the index of the 3D anatomical anchor, for which the displacements are displayed, within the time-series