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Table 4: Median values and range of perfusion parameters in 26 patients, according to arterial input region of interest*
Perfusion Parameter Reader Right ECA Left ECA P Value
BF Expert A 86.9 (43.3–344.3) 79.0 (40.8–356.3) .28
Expert B 83.9 (38.4–301.8) 83.7 (33.0–246.3) .22
Nonexperienced 84.0 (40.1–289.3) 81.2 (35.2–284.3) .02
BV Expert A 6.1 (3.6–16.6) 6.1 (4.2–14.2) .37
Expert B 5.9 (3.8–11.9) 5.7 (4.2–12.9) .07
Nonexperienced 5.9 (4.3–13.7) 6.0 (4.4–14.6) .22
MTT Expert A 5.7 (2.9–12.4) 6.4 (2.7–12.8) .08
Expert B 5.9 (2.6–11.9) 6.1 (2.6–13.4) <.01
Nonexperienced 5.2 (3.0–12.0) 5.4 (3.0–12.4) .02
PS Expert A 14.6 (2.2–28.9) 16.4 (3.7–46.4) .03
Expert B 13.0 (1.7–29.4) 13.4 (1.2–32.7) <.01
Nonexperienced 12.4 (0.5–25.5) 14.2 (1.3–31.4) .65
Note:—ECA indicates external carotid artery.
* Wilcoxon signed rank test for the difference between paired perfusion values in right-versus-left and in ipsilateral-versus-contralateral ECAs.