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Ct = Carat, abbreviated "ct." and spelled with a "c" is a measure of weight used for gemstones. One carat is equal to 1/5 of a gram (200 milligrams). Stones are measured to the nearest hundredth of a carat.
Systems, Devices, and Method for Computed Tomography (CT) Reconstruction using Diffusion Posterior Sampling conditioned on a Nonlinear Measurement Model
A computer system, a non-transitory computer readable medium, and a method for computed tomography (CT) reconstruction. The computer system is configured to perform the method and the computer readable medium is configured to store instructions for performing the method. The method includes obtaining two or more spectral CT measurement data of different materials of a target from one or more 2D or 3D spectral CT images acquired by a CT imaging system using more than one CT imaging energy regimes; and producing a pair reconstructed spectral CT images that are representative of densities of the different materials of the target by performing one or more iterations on the two or more spectral CT measurement data using a trained machine learning network that is trained to performing a diffusion sampling operation and a forward-model-based likelihood on one or more intermediate data sets representing the two or more spectral CT measurement data.
Owner:JOHNS HOPKINS UNIVERSITY