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TABLE 1: Repeated measurements of lesion sizes
Baboon Observer 1 Measurements (mm²) Observer 2 Measurements (mm²)
CT Perfusion CT Perfusion 
30 Minutes 150 Minutes 30 Minutes 150 Minutes
CBF CBV MTT CBF CBV MTT MRI CBF CBV MTT CBF CBV MTT MRI
1 878 888 878 847 845 846 912 864 897 886 897 907 856 882
2 818 815 775 376 329 334 413 840 854 845 384 386 396 382
3 865 829 855 817 929 844 901 888 869 843 903 844 905 873
4 422 399 775 402 405 709 495 453 463 915 493 469 875 484
5 756 731 749 ND ND ND 696 704 709 726 ND ND ND 724
1 884 885 857 874 857 847 834 840 884 905 894 850 917 865
2 844 833 844 346 317 331 404 868 858 832 403 406 413 370
3 840 811 819 909 871 801 884 877 908 874 904 905 849 879
4 422 398 819 408 396 797 493 493 482 921 462 498 852 472
5 776 671 707 ND ND ND 684 715 685 683 ND ND ND 732
1 909 881 872 911 896 868 863 865 847 920 849 874 847 858
2 862 868 840 392 350 322 379 826 833 839 382 376 406 383
3 909 868 859 903 892 876 863 881 889 850 862 859 823 890
4 415 403 763 412 401 750 434 464 501 852 488 485 917 488
5 759 712 688 ND ND ND 655 710 711 722 ND ND ND 736
1 920 893 915 931 832 883 912 909 871 868 867 925 898 863
2 852 850 805 392 379 359 369 871 819 820 401 391 413 377
3 948 855 844 907 874 860 887 861 902 866 849 828 878 861
4 409 406 774 421 401 762 460 478 470 837 479 471 876 472
5 749 711 651 ND ND ND 683 729 683 707 ND ND ND 725
Coefficient of Variation (%)^* Coefficient of Variation (%)^*
1 2.2 0.6 2.8 4.2 3.2 2.1 4.4 3.3 2.5 2.5 2.6 3.7 3.8 1.2
2 2.3 2.7 4.0 5.8 7.9 4.7 5.3 2.5 2.1 1.3 2.8 3.2 2.0 1.7
3 5.4 3.0 2.1 5.1 3.0 3.8 1.8 1.3 2.0 1.7 3.2 3.8 4.1 1.4
4 1.5 0.9 3.1 1.9 1.0 4.8 6.2 3.7 3.5 4.9 2.9 2.7 3.1 1.7
5 1.5 3.6 5.8 ND ND ND 2.6 1.5 2.2 2.7 ND ND ND 0.8
↵* Average variabilities were 3.7% for observer 1 and 2.1% for observer 2. No statistically significant differences in interobserver or intraobserver variabilities were present, as measured by using ANOVA (P > 0.36).