Density of projecting signal (number of projecting pixels / volume)
Density of projecting signal multiplied by total signal intensity
Fraction of pixels belonging to the injection site
Density of projecting signal for pixels belonging to the injection site
Injection density multiplied by total signal intensity for pixels belonging to the injection site
of pixels containing projecting signal Binary image where a value of '1' indicates that greater than 50% of a grid voxel contains valid data.