Figure 2

Plots of percentage of pixels within +/- 6 mm/sec velocity limits as obtained with no fitting, linear-only and nonlinear fitting for 31 CINE phase-contrast images. 27 images were acquired from 11 subjects at 3T (solid lines) and 4 images were acquired from 1 subject at 1.5T (dashed line). With no fitting, 4/31 instances had > 90% pixels within a 4-cm radius at isocenter that are within the velocity limits. With linear and nonlinear, 7/31 and 25/31 instances had > 90% of pixels within the velocity limits.