TABLE 2. Selected Texture Features (Median) That Showed Statistical Significant Difference, Extracted From the IMC and Plaque Rois From 120 Videos Investigated for the Three Different Groups (N, A, S). Texture Features at Systole (Sys) and Diastole (Dia) are Shown for the Three Different Groups.
| Texture Feature | Texture | %CV | ||||
|---|---|---|---|---|---|---|
| N | A | S | N | A | S | |
| Sys/Dia | Sys/Dia | Sys/Dia | Sys/Dia | Sys/ Dia | Sys/Dia | |
| Statistical Features (SF) | ||||||
| GSM | 42/39 | 44/35 | 36/29 | 3.0/3.2 | 4.8/ 4.6 | 3.0/ 3.0 |
| STD | 72/70 | 62/68 | 69/63 | 2.7/2.8 | 3.5/ 3.6 | 2.9/ 2.6 |
| Spatial Gray Level Dependence Matrix (SGLDM) | ||||||
| Contrast | 41/19 | 39/26 | 41/29 | 1.7/1.9 | 3.5/ 3.6 | 2.8/2.9 |
| Correlation | 0.96/0.98 | 0.97/0.98 | 0.97/1.0 | 0.64/0.66 | 0.95/0.97 | 0.54/0.56 |
| IDM | 0.28/0.29 | 0.59/0.63 | 0.46/0.48 | 3.4/3.6 | 3.9/ 3.9 | 4.0/4.2 |
| SV*103 | 21/22 | 18/21 | 20/31 | 2.1/2.3 | 3.2/ 3.3 | 2.5/2.5 |
| Gray Level Difference Statistics (GLDS) | ||||||
| Entropy | 6.1/ 6.2 | 5.8/5.9 | 6.2/6.8 | 1.5/1.5 | 1.4/ 1.2 | 3.7/3.6 |
| Contrast | 31/28 | 16/13 | 13/10 | 1.7/1.3 | 3.5/ 3.6 | 2.8/2.8 |
| Neighborhood Gray Tone Difference Statistics (NGTDM) | ||||||
| Coarseness | 10.1/10.2 | 36/39 | 22/25 | 5.8/5.8 | 2.5/ 2.6 | 6.5/6.7 |
| Contrast | 31/29 | 36/24 | 23/19 | 3.4/3.1 | 4.1/ 4.3 | 2.6/1.4 |
| Statistical Feature Matrix (SFM) | ||||||
| Periodicity | 0.81/0.79 | 0.82/0.85 | 0.76/0.80 | 3.4/ 3.4 | 3.8/ 4.0 | 4.3/4.4 |
| Roughness | 2.2/2.3 | 2.9/2.10 | 2.13/2.14 | 4.0/4.1 | 2.2/ 2.1 | 3.3/2.2 |
| Laws Texture Energy Measures (LTEM) | ||||||
| LL*104 | 25/25 | 26/26 | 27/27 | 4.7/6.0 | 5.8/ 1.7 | 1.2/1.3 |
| SS | 210/221 | 180/169 | 157/165 | 1.3/1.3 | 2.1/ 2.2 | 2.5/2.4 |
| Fractal Dimension Analysis (FDTA) | ||||||
| H1 | 0.47/0.47 | 0.54/0.56 | 0.56/ 0.55 | 0.5/0.5 | 0.5/0.4 | 0.4/0.5 |
N, A, S: Normal, asymptomatic and symptomatic group of subjects, GSM: Gray scale median, STD: Standard deviation, IDM: Inverse difference moment, SV: Sum Variance, LL: Texture energy from LL kernel, SS: Texture energy from SS kernel, H1: Hoerst coefficient, %CV: Coefficient of variation.