Table I.
The Names, Descriptions and Units of the 3D Parameters
| 3D parameters | Description | Units |
|---|---|---|
| Volume | Volume of the whole pellet | μm3 |
| Surface area | Surface area of whole pellet | μm2 |
| Diameter | Equivalent diameter of whole pellet | μm |
| Sphericity | A measure of how spherical an object is | Dimensionless |
| Volume of void | Volume of the void | μm3 |
| Surface area of void | Surface area of the void | μm2 |
| Void fraction | The volume of voids over the total volume | % |
| Specific surface area | The surface area per unit volume | μm−1 |
| Surface area without void | Surface area of the pellet without void | μm2 |
| Drug content in unit volume | The amount of drug in unit volume | ng/μm3 |