X-ray Phase-Contrast Radiography and Tomography with a Multiaperture Analyzer.

M Endrizzi,D Dreossi,A Olivo,F Iacoviello,F A Vittoria,P R Shearing,L Rigon

doi:10.1103/physrevlett.118.243902

Abstract

We present a multiaperture analyzer setup for performing x-ray phase contrast imaging in planar and three-dimensional modalities. The method is based on strongly structuring the x-ray beam with an amplitude modulator, before it reaches the sample, and on a multiaperture analyzing element before detection. A multislice representation of the sample is used to establish a quantitative relation between projection images and the corresponding three-dimensional distributions, leading to successful tomographic reconstruction. Sample absorption, phase, and scattering are retrieved from the measurement of five intensity projections. The method is tested on custom-built phantoms with synchrotron radiation: sample absorption and phase can be reliably retrieved also in combination with strong scatterers, simultaneously attaining high sensitivity and dynamic range.

Highlights

We present a multiaperture analyzer setup for performing x-ray phase contrast imaging in planar and three-dimensional modalities
The method is tested on custom-built phantoms with synchrotron radiation: sample absorption and phase can be reliably retrieved in combination with strong scatterers, simultaneously attaining high sensitivity and dynamic range
In x-ray phase-contrast imaging (XPCI) [1,2], additional contrast mechanisms, generating from the phase shifts imparted to the beam by the sample, contribute to the image formation process

Summary

Introduction

We present a multiaperture analyzer setup for performing x-ray phase contrast imaging in planar and three-dimensional modalities. Phase, and scattering are retrieved from the measurement of five intensity projections.

Results

Conclusion