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).