This presentation offers a clear and comprehensive overview of the principles underlying CT image reconstruction and common artifacts. It also addresses core concepts such as filtered backprojection and methods for reducing metal artifacts.

The presentation utilizes a CT simulator developed with Visual Studio 2022 (Microsoft, USA), which illustrates object rotation and provides real-time sinogram visualization, like a movie. The simulator models beam hardening and radial metal artifacts, and demonstrates techniques for reducing metal artifacts.

The simulated object includes a dental arch with zero to three metal crowns, enabling variable artifact intensity and reduction parameters. Beam hardening, resulting from sensor saturation, can be identified in the sinogram, while radial metal artifacts arise from sampling instabilities at metal boundaries—also observable within the sinogram. By understanding the origins of these artifacts, we gain insight into effective artifact reduction strategies.

This CT simulator facilitates understanding of the image reconstruction process and provides valuable support for mastering artifact mitigation principles.
The presentation explains the fundamentals of CT image reconstruction and artifact formation, with an emphasis on filtered backprojection and metal artifact reduction.