Extended Data Figure 7. Dilation measurements using the cross section algorithm do not depend on the precise location and angle of the selected cross section.

a, Example cat pial artery (from Fig. 1c) labeled with Texas-red dextran. b, Another pial artery from a different cat labelled with the artery specific dye Alexa 633. Both arteries show similar tuning for cross-sections drawn > 100 μm apart and also drawn perpendicular and obliquely relative to the vessel walls.