A step toward a clinically viable ABI phase-contrast imaging: double emission line artifacts correction

摘要

Analyzer-based phase-contrast imaging (ABI) is a promising X-ray imaging technique with huge potential for soft tissue imaging. Unfortunately, ABI requires quasi-monochromatic beam, which limits the beam photon budget, therefore imaging requires a long exposure time. In classical ABI imaging only one K-alpha emission line is permitted. Relaxing this requirement and even further by utilizing both K-alpha emission lines for imaging can significantly reduce the exposure time. However, accepting both emission lines introduce a double-image artifact due to the energy-angular difference between the emission lines. In this paper we introduce a method to correct for such artifacts and overcome one of the main design limitation of Analyzer-Based systems to achieve high quality phase-contrast mammograms in a clinically relevant time.