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The formation principle of X-ray computed tomography (CT) beam hardening and the effect law of noise on the correction result were studied. The suppression methods of noise impact in the process of beam hardening correction were presented from the following three aspects: First of all, aiming at the adverse factors of original beam hardening data, such as noise and measurement error, a method of simplifying...
The main manifestations of artifacts and their causes in cone-beam computed tomography (CBCT) system were studied, and then the general CBCT digital radiography (DR) imaging model was described with a mathematical expression. On this basis, a new expression of DR imaging model was proposed according to the actual imaging noise and enforceability of corrective action, and so the projection image was...
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