Tetrahedron-based orthogonal simultaneous scan for cone-beam computed tomography

Area of Science:

• Medical Imaging
• Computed Tomography
• X-ray Imaging

Background:

• Cone-beam computed tomography (CBCT) is crucial for detailed 3D imaging.
• Existing CBCT methods face challenges in efficiency and reconstruction accuracy.
• Optimizing scanning geometries is key to improving CBCT performance.

Purpose of the Study:

• To design an innovative CBCT scanning mode utilizing multiple X-ray sources.
• To enhance the precision and stability of 3D object reconstruction.
• To explore applications in biomedical and industrial imaging.

Main Methods:

• A novel CBCT scanning geometry was designed with four X-ray sources positioned at the vertices of a regular tetrahedron.
• Four detection panels were strategically placed on the circumsphere, opposite each X-ray source.
• A scanning scheme involving two orthogonal rotations was proposed, with data acquisition at quarter turns.

Main Results:

• The designed system ensures minimal X-ray interference with a maximum half angle of 27°22'.
• A significant portion of the sample volume (radius 0.460) is covered by the cone beams.
• Each quarter turn of the proposed scanning scheme provides sufficient data for exact and stable reconstruction.

Conclusions:

• The developed CBCT scanning mode offers a theoretically exact and stable reconstruction method.
• This design is suitable for applications requiring sequential 3D reconstructions of objects.
• The system holds potential for advancements in both biomedical and industrial imaging fields.