Image Modalities | Indices | Pixel Averaging | DWT | NSCT [29] | NSCT [21] | Proposed method |
MR-T1 and MRA (a1,a2 in Figure 4) | Entropy | 5.7740 | 6.2799 | 6.5258 | 6.3781 | 6.6196 |
Mean | 44.6319 | 45.5721 | 54.1768 | 44.6239 | 66.8225 | |
Standard Deviation | 42.9244 | 45.9368 | 60.6170 | 57.2812 | 68.3524 | |
QAB/F | 0.3924 | 0.4784 | 0.5073 | 0.5760 | 0.6098 | |
MR-GAD and CT (b1,b2 in Figure 4) | Entropy | 3.3717 | 4.7852 | 5.1823 | 5.6291 | 5.6532 |
Mean | 52.2504 | 55.3844 | 59.5492 | 53.7018 | 68.9811 | |
Standard Deviation | 57.1731 | 63.4296 | 76.6243 | 68.5283 | 77.5469 | |
QAB/F | 0.2729 | 0.4403 | 0.4914 | 0.5162 | 0.5184 | |
MRI and PET(c1,c2 in Figure 4) | Entropy | 4.1792 | 4.4304 | 4.8845 | 4.8481 | 5.0438 |
Mean | 25.5341 | 26.8745 | 41.5089 | 27.7156 | 44.0946 | |
Standard Deviation | 37.1539 | 41.9471 | 61.4458 | 52.3839 | 65.0344 | |
QAB/F | 0.4263 | 0.4573 | 0.7172 | 0.5988 | 0.7669 | |
MRI and CT (d1,d2 in Figure 4) | Entropy | 5.7946 | 5.9607 | 5.9871 | 6.7113 | 6.7730 |
Mean | 31.8152 | 32.0969 | 35.0844 | 45.7742 | 55.8929 | |
Standard Deviation | 32.9372 | 34.9653 | 56.0279 | 55.5250 | 57.1968 | |
QAB/F | 0.3906 | 0.4295 | 0.5945 | 0.7202 | 0.7641 | |
CT and PET(chest) (e1,e2 in Figure 4) | Entropy | 3.3121 | 3.7276 | 4.3933 | 4.4635 | 4.4744 |
Mean | 15.9986 | 16.2869 | 20.1181 | 17.7222 | 22.1684 | |
Standard Deviation | 27.4101 | 29.8332 | 39.1539 | 35.7792 | 40.6165 | |
QAB/F | 0.5253 | 0.5200 | 0.7665 | 0.6917 | 0.7981 | |
MRI and CT (f1,f2 in Figure 4) | Entropy | 6.3028 | 6.4563 | 6.8183 | 7.0079 | 7.0111 |
Mean | 48.5624 | 48.4227 | 67.7103 | 50.9031 | 70.3537 | |
Standard Deviation | 30.0012 | 31.1101 | 46.2548 | 43.7342 | 47.0861 | |
QAB/F | 0.3297 | 0.3632 | 0.4708 | 0.5313 | 0.5411 |