projection_density

Density of projecting signal (number of projecting pixels / volume)

projection_energy

Density of projecting signal multiplied by total signal intensity

injection_fraction

Fraction of pixels belonging to the injection site

injection_density

Density of projecting signal for pixels belonging to the injection site

injection_energy

Injection density multiplied by total signal intensity for pixels belonging to the injection site

data_mask Fraction

of pixels containing projecting signal Binary image where a value of '1' indicates that greater than 50% of a grid voxel contains valid data.