Fast X-ray Differential Phase Contrast Imaging with One Exposure and without Movements

Area of Science:

• Medical Imaging
• X-ray Imaging
• Phase Contrast Imaging

Background:

• Grating interferometry X-ray differential phase contrast imaging (GI-XDPCI) offers superior contrast but suffers from low efficiency and high dose.
• Current GI-XDPCI requires time-consuming grating stepping, increasing X-ray exposure and limiting practical applications.

Purpose of the Study:

• To develop a fast GI-XDPCI method that overcomes the limitations of traditional grating stepping techniques.
• To introduce a novel absorption grating design enabling stationary imaging for enhanced efficiency and reduced dose.

Main Methods:

• A new absorption grating was designed to facilitate stationary GI-XDPCI, eliminating the need for component movement.
• The method was numerically studied and experimentally verified using data from the Shanghai Synchrotron Radiation Facility (SSRF).

Main Results:

• The proposed stationary GI-XDPCI method significantly reduces imaging time compared to conventional techniques.
• Three types of imaging contrasts were successfully acquired with greatly reduced exposure.
• Numerical simulations and experimental data validated the efficacy of the presented method.

Conclusions:

• The novel stationary GI-XDPCI approach offers a faster and more efficient alternative for X-ray imaging.
• This advancement addresses the key bottlenecks of low efficiency and high dose in GI-XDPCI, paving the way for broader engineering applications.