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- W2024200434 abstract "X-ray scatter is a major degrading factor in x-ray cone beam (CB) CT imaging. In the scatter corrections by using MonteCarlo (MC) simulation, the initial MC modeling is not accurate based on the scatter-polluted volume images, thus thecorrection has to be performed iteratively, which is one of the reasons that MC based correction is computationaldemanding. In this paper, we found a relationship that the ratio of IS (scatter) to IP+S (primary plus scatter) can beapproximated by the weighted data in Radon space. On this basis, we develop a strategy called Projection ContrastEnhancement based Pre-Correction (PCEPC). PCEPC is efficient, achieving a scatter pre-correction with enhancedimage Quality (Q) of ~0.7 (Q=1 for scatter-free images; Q=0 for scatter-contaminated images without correction). Byusing the results of PCEPC, more accurate MC modeling on the scanned object is feasible with less iterations or even ina non-iterative way, namely as the PCEPC-MC method. An exemplary non-iterative PCEPC-MC is implemented, inwhich the scatter fluence of eighteen views equally distributed over 2π is simulated by MC toolkit EGSnrc, enhancingthe Q further to ~0.8." @default.
- W2024200434 created "2016-06-24" @default.
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- W2024200434 date "2011-03-03" @default.
- W2024200434 modified "2023-09-23" @default.
- W2024200434 title "An efficient scatter correction algorithm based on pre-reconstructed images of contrast enhancement and sparse-viewed Monte Carlo simulation" @default.
- W2024200434 doi "https://doi.org/10.1117/12.877551" @default.
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