Research Article
Study of the Influence of Age in 18F-FDG PET Images Using a Data-Driven Approach and Its Evaluation in Alzheimer’s Disease
Table 2
Information obtained from an IC output by FLICA.
| Parameters | Meaning | Utility in this study |
| IC value | IC value: representing the weight of each subject’s intensity explained by the corresponding IC | Used to find out the IC that has the strongest negative relationship with age (see results in Section 3.1.1) | SI | Spatial information: representing the regions that correspond to each IC (Figure 1) | Used to define initial brain regions | VV | Voxel value: the probability operation results of each voxel within the regions of IC (Figure 1) | - | | The thresholds of VV | Used to determine the more accurate age-related regions (see details in Section 2.4.2) |
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