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 |