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A decomposition-based CT reconstruction formulation for reducing blooming artifacts.

机译:基于分解的CT重建公式,可减少泛光伪影。

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Cardiac computed tomography represents an important advancement in the ability to assess coronary vessels. The accuracy of these non-invasive imaging studies is limited, however, by the presence of calcium, since calcium blooming artifacts lead to an over-estimation of the degree of luminal narrowing. To address this problem, we have developed a unified decomposition-based iterative reconstruction formulation, where different penalty functions are imposed on dense objects (i.e. calcium) and soft tissue. The result is a quantifiable reduction in blooming artifacts without the introduction of new distortions away from the blooming observed in other methods. Results are shown for simulations, phantoms, ex vivo, and in vivo studies.
机译:心脏计算机断层扫描是评估冠状动脉血管能力的重要进步。然而,这些非侵入性成像研究的准确性受到钙的存在的限制,因为钙泛华的伪影会导致对管腔狭窄程度的高估。为了解决这个问题,我们开发了一个基于分解的统一迭代重建公式,其中对密集对象(即钙)和软组织施加了不同的惩罚函数。结果是可以量化地减少起霜伪影,而不会在其他方法中观察到的起霜情况下不引入新的失真。显示了模拟,体模,离体和体内研究的结果。

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