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X-ray beam-hardening correction in tomographic reconstruction using the Alvarez-Macovski attenuation model
X-ray beam-hardening correction in tomographic reconstruction using the Alvarez-Macovski attenuation model
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机译:使用Alvarez-Macovski衰减模型的层析成像重建中的X射线束硬化校正
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#$%^&*AU2019202047A120191107.pdf#####X-ray beam-hardening correction in tomographic reconstruction using the Alvarez-Macovski attenuation model ABSTRACT OF THE DISCLOSURE Methods and apparatuses disclosed herein provide beam hardening correction to tomographic reconstruction using a simplification to the Alvarez-Macovski attenuation model. An example method includes simplifying a forward projection model, the forward projection model based on an Alvarez-Macovski (AM) attenuation model, wherein the simplification of the forward projection model simplifies the AM attenuation model for one of photoelectric effect only, constant density, constant atomic number, and density proportional to atomic number, and performing an iterative reconstruction of a sample using the simplified forward projection model, the iterative reconstruction weighted by a first spectrum, wherein measured image data of the sample used in the iterative reconstruction is obtained at a first energy, and wherein a reverse operation of the iterative reconstruction is a non-adjoint to the simplified forward projection model. P0006867AU_22405840_1
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