Cone-beam tomography of propagation-based imaging

Abstract

A tomography algorithm is proposed for the reconstruction of the three-dimensional ͑3D͒ distribution of the real refractive index of a pure phase sample from the projections of cone-beam propagation-based imaging ͑PBI͒. The algorithm first retrieves the integral of the real refractive index based on the formula described in this letter, and then a conventional computed tomography algorithm is performed to reconstruct the 3D distribution of the real refractive index of the sample. The computer simulations show that this method is effective for PBI tomography.

Polychromatic X-ray in-line phase-contrast tomography for soft tissue

“…Consequently, it is an effective tool for the characterization of a soft tissue with complex structure. There are several means to implement X-ray phase-contrast CT, such as analyzer crystal interferometry [2,3], grating interferometry [4][5][6], diffraction enhanced [7,8], in-line [9][10][11][12][13][14][15][16], and Zernike [17,18] phase-contrast tomography. Among them, the in-line phase-contrast CT based on a micro-focus source is one of the suitable ways for practical application, due to its simple setup and no mirror, crystal, grating, and expensive synchrotron radiation needed.…”