Fig. 3

Illustration of motion categories. Readers subjectively assigned images to one of four motion categories based on visual assessment. Each motion category is illustrated by an example shown at the fifth time point after contrast agent injection. The higher the initial motion category, the greater was the visually perceived impact of motion on image quality and hence, potential diagnostic limitation. The unenhanced image was subtracted from the enhanced images. Lesions are indicated by an arrow in the second column (full-size images after registration). The respective areas were enlarged and are shown in columns three and four, before and after registration, respectively