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Table 2 Eye bulb volumes of the segmented images before (left) and after (right) normalization

From: Measuring eye states in functional MRI

Subj. Realigned only Normalized
Size bulb (voxel) Size (mm3) Size bulb (voxel) Size (mm3)
Left SD Right SD Left SD Right SD Left SD Right SD Left SD Right SD
1 218.3 14.2 255.3 15.9 5893.7 382.6 6894.3 428.3 223.3 22.9 236.3 18.0 6029.6 618.0 6379.3 485.1
2 246.0 45.0 294.4 26.6 6642.6 1214.8 7948.6 719.3 256.1 31.3 244.0 23.1 6915.1 846.4 6587.1 622.7
3 153.7 16.4 172.7 21.6 4148.7 443.7 4664.2 584.3 213.5 75.7 227.7 95.4 5764.6 2044.5 6146.8 2574.9
4 315.6 47.7 382.0 33.2 8521.1 1288.8 10313.0 896.7 308.1 56.1 305.5 35.7 8319.4 1515.9 8248.1 962.7
5 372.8 31.6 377.2 43.7 10066.3 852.9 10183.1 1179.0 348.7 42.6 319.5 36.1 9414.2 1150.1 8627.2 975.9
6 289.8 37.8 334.6 36.7 7823.4 1020.3 9032.9 991.5 287.3 28.8 298.2 26.6 7758.1 777.6 8050.6 718.5
7 303.5 34.4 382.6 32.5 8195.1 928.9 10330.5 876.5 293.8 35.5 332.2 32.7 7932.1 958.6 8968.3 883.1
8 150.4 11.9 159.8 16.9 4059.5 320.8 4315.5 456.8 248.6 23.0 251.0 21.1 6711.3 621.2 6778.2 569.2
9 172.1 13.0 105.8 16.9 4646.3 352.1 2857.3 457.2 235.2 28.3 202.5 28.6 6349.3 762.8 5467.6 772.8
10 281.2 13.0 157.6 16.9 7592.6 352.1 4254.8 457.2 283.9 29.9 215.4 28.4 7665.7 808.3 5814.7 765.6
11 261.0 49.0 354.5 42.3 7047.4 1322.1 9572.1 1143.4 265.1 38.1 301.0 26.6 7157.6 1029.1 8126.9 717.6
12 327.9 30.6 279.2 22.9 8853.6 827.4 7539.0 618.7 293.0 38.1 254.5 17.4 7911.2 1030.0 6872.6 471.1
13 235.2 69.4 240.0 70.8 6351.7 1875.0 6479.9 1911.6 266.7 54.1 261.1 72.6 7201.2 1461.0 7050.0 1959.4
14 226.0 28.9 262.8 24.3 6101.6 780.6 7094.8 656.4 270.0 38.4 269.9 27.5 7289.9 1036.5 7287.8 743.0
MW 256 ± 64 269 ± 89  6911 ± 1736  7260 ± 2404 271 ± 34 265 ± 39 7318 ± 927 7163 ± 1043         
  1. Images were recorded with a 3 × 3 × 3 mm resolution; therefore, the conversion factor from voxel volume to mm3 is 27. There was no significant difference between the bulb volumes before and after normalization (at p ≤ 0.05); however, volumes were correlated with 0.92 for the left and right eyes