Table 3.

Statistically significant intergroup differences of (a) ratings of the motion-corrected images, (b) ratings of the perfusion maps, (c) R² values and residuals of the maximum slope model and (d) R² values and residuals of the Patlak model

Evaluated scenario	Commercial rigid	Commercial non-rigid	Deformable	Deformable DE-blended	Deformable VNC	Control
a) Ratings: motion-corrected images
Commercial rigid		✓	✓	✓	✓	×
Commercial non-rigid			✓	✓	✓	✓
Deformable				×	✓	✓
Deformable DE-blended					✓	✓
Deformable VNC						✓
Control
b) Ratings: perfusion maps
Commercial rigid		✓	✓	✓	×	×
Commercial non-rigid			×	×	×	×
Deformable				×	✓	✓
Deformable DE-blended					✓	✓
Deformable VNC						×
Control
c) R² values and residuals: maximum slope model
Commercial rigid		✓	✓	✓	✓	✓
Commercial non-rigid			✓	✓	Res.	✓
Deformable				×	✓	✓
Deformable DE-blended					✓	✓
Deformable VNC						✓
Control
d) R² values and residuals: Patlak model
Commercial rigid		✓	✓	✓	✓	×
Commercial non-rigid			✓	✓	✓	✓
Deformable				×	✓	✓
Deformable DE-blended					✓	✓
Deformable VNC						✓
Control

✓, significant; ×, not significant; DE, dual-energy; Res., only significant for residuals; VNC, virtual non-contrast.

Note that the lower half of the tables is omitted because of the inherent symmetry of the statistical tests.