Histogram Analysis of Perfusion Parameters from Dynamic Contrast-Enhanced MR Imaging with Tumor Characteristics and Therapeutic Response in Locally Advanced Rectal Cancer
Table 1
Interobserver intraclass correlation coefficient for measurements of perfusion parameters.
Parameter
AUC
Mean
0.971 (0.943, 0.985)
0.995 (0.990, 0.997)
0.982 (0.965, 0.991)
0.993 (0.987, 0.997)
0.996 (0.993, 0.998)
Minimum
0.435 (0.129, 0.665)
0.414 (0.104, 0.651)
0.665 (0.435, 0.814)
0.747 (0.559, 0.863)
0.889 (0.794, 0.942)
10th percentile
0.264 (-0.065, 0.542)
0.973 (0.948, 0.986)
0.907 (0.826, 0.952)
0.977 (0.955, 0.988)
0.998 (0.996, 0.999)
20th percentile
0.254 (-0.077, 0.534)
0.985 (0.970, 0.992)
0.925 (0.859, 0.961)
0.967 (0.936, 0.983)
0.998 (0.995, 0.999)
30th percentile
0.413 (0.103, 0.650)
0.989 (0.979, 0.995)
0.936 (0.879, 0.967)
0.979 (0.960, 0.989)
0.998 (0.997, 0.999)
40th percentile
0.788 (0.623,0.886)
0.993 (0.986, 0.996)
0.970 (0.941, 0.984)
0.987 (0.974, 0.993)
0.997 (0.995, 0.999)
50th percentile
0.928 (0.863, 0.963)
0.995 (0.990, 0.997)
0.981 (0.963, 0.991)
0.987 (0.974, 0.993)
0.998 (0.996, 0.999)
60th percentile
0.993 (0.986, 0.996)
0.997 (0.994, 0.998)
0.982 (0.964, 0.991)
0.990 (0.981, 0.995)
0.994 (0.988, 0.997)
70th percentile
0.996 (0.993, 0.998)
0.996 (0.993, 0.998)
0.991 (0.982, 0.995)
0.991 (0.982, 0.995)
0.991 (0.982, 0.995)
80th percentile
0.996 (0.993, 0.998)
0.994 (0.988, 0.997)
0.995 (0.989, 0.997)
0.993 (0.986, 0.996)
0.977 (0.955, 0.988)
90th percentile
0.996 (0.991, 0.998)
0.995 (0.991, 0.998)
0.996 (0.992, 0.998)
0.994 (0.988, 0.997)
0.994 (0.988, 0.997)
Maximum
0.970 (0.941, 0.984)
0.972 (0.947, 0.986)
1.000
0.997 (0.994, 0.999)
1.000
Standard deviation
0.981 (0.965, 0.989)
0.993 (0.987, 0.996)
0.962 (0.931, 0.979)
0.996 (0.992, 0.998)
0.961 (0.930, 0.979)
Mode
0.965 (0.933, 0.982)
0.925 (0.856, 0.962)
0.957 (0.912, 0.978)
0.835 (0.700, 0.912)
0.998 (0.996, 0.999)
Skewness
0.955 (0.913, 0.977)
0.969 (0.940, 0.984)
0.950 (0.904, 0.974)
0.990 (0.980, 0.995)
0.988 (0.978, 0.994)
Kurtosis
0.888 (0.792, 0.941)
0.935 (0.877, 0.966)
0.920 (0.849, 0.958)
0.984 (0.968, 0.992)
0.967 (0.936, 0.983)
Note. Data in parentheses are 95% confidence intervals.
