| 摘要 |
Coronary artery calcification is quantified based on a computed tomography (CT) scan image. A calcified region is identified. The partial calcium content of each pixel in the calcified region can be estimated. For example, expectation maximization of a statistical model of the calcified and background material can be used to estimate the partial calcium content of the pixels. The estimated partial calcium content can be used to generate a map of the partial calcium content in the calcified region. The mass of calcium in the calcified region can be determined based on the map. According to an embodiment, techniques of quantifying calcification that are disclosed herein provide lower inter-scan variation than conventional techniques.
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