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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...
According to the noise properties and the serial slice image characteristics in cone-beam computed tomography (CBCT) system, an adaptive filter for serial slice images of CBCT was proposed. The judging criterion for the noise is established firstly. All pixels are classified into two classes, one is the pixels which are corrupted by Gauss noise and the other is the pixels corrupted by impulse noise...
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