Table 1.
Summary of variables used to quantify vascular density and branching
| Measured variable | Calculation |
|---|---|
| Branch Density (branches/µm3) | Number of branches/volume of image stack |
| Fraction Volume (unitless) | Volume of blood vessels/volume of image stack |
| Gray Matter Branch Density Ratio (unitless) | Gray matter sulcus branch density/gray matter crest branch density |
| Gray Matter Fraction Volume Ratio (unitless) | Gray matter sulcus fraction volume/gray matter crest fraction volume |
| White Matter Branch Density Ratio (unitless) | White matter sulcus branch density/white matter crest branch density |
| White Matter Fraction Volume Ratio (unitless) | White matter sulcus fraction volume/white matter crest fraction volume |