A way to reduce the artifacts caused by intensely absorbing areas in computed tomography

Чукалина М. В.; A. Ingacheva; Прун В. Е.; Бузмаков А. В.; Николаев Д. П.

doi:527-531

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A way to reduce the artifacts caused by intensely absorbing areas in computed tomography

Чукалина М. В., Ingacheva A., Прун В. Е., Бузмаков А. В., Николаев Д. П.

Artifacts caused by intensely absorbing areas are encountered in computed tomography and may obscure or simulate pathology in medical applications, hide or mimic the cracks and cavities in the devices at industrial applications. We simulated sinograms with different levels of absorption to demonstrate the artifacts dynamics. If the analysis of the measured data shows the presence of strongly absorbing areas in the object under study we propose to use quadratic programming technique for solving the inverse problem. Although the technique is time-consuming it allows us to avoid the typical artifacts. We compare the images reconstructed with different techniques including the proposed one. ©ECMS Valeri M. Mladenov, Petia Georgieva, Grisha Spasov, Galidiya Petrova (Editors).

Keywords: Quadratic programming Algebraic reconstruction technique Computed tomography Metal and metal-like artifacts

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