Few-Photon Computed X-Ray Imaging

Abstract

X-rays are a ubiquitous imaging modality in clinical diagnostics and industrial inspections, thanks to their high penetration power. Conventional transmission-based x-ray radiography or computed tomography systems collect approximately 103-104 counts per pixel to ensure sufficient signal to noise ratio. The recent development of energy sensitive photon counting detectors has made x-ray imaging at low photon fluxes possible. In this paper, we report a photon-counting scheme that records the time stamp of individual photons, which follows a negative binomial distribution, and demonstrate the reconstruction based on the few-photon statistics. The x-ray projection and tomography reconstruction from measurements of ∼16 photons per beam show potential for using photon counting detectors for dose-efficient x-ray imaging applications.

Publication Date

12-3-2018

Publication Title

Applied Physics Letters

Volume

113

Issue

23

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1063/1.5050890

Socpus ID

85058117916 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85058117916

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