X-ray CT (computed tomography) is a non-destructive 3D imaging technique. The CT images are segmented into different "phases" (materials with different densities) based on their gray levels. By calculating how many voxels are included in each phase, you can obtain volume fractions. This technique is often used to quantify phases in rocks, drug tablets, processed food, or porosity in porous or foam materials. Amorphous and crystalline phases can be also distinguished and analyzed when there is enough density difference between the two states.

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Multivitamin tablet volume fractio

Phase Volume Fraction Application Examples