K-edge energy-based calibration method for photon counting detectors

Projection-Based Denoising Method for Photon-Counting Energy-Resolving Detectors

In this paper, we present a novel projection-based novel noise reduction method for photon counting energy resolving detectors in Spectral Computed Tomography (CT) imaging. In order to denoise the projection data, a guidance image from all energy channels is computed, which employs a variant of the joint bilateral filter to denoise each energy bin individually. The method is evaluated by a simu...

High Accuracy Calibration of Photon-Counting Detectors

We discuss a practical implementation of a photon-counting detector calibration using correlated photon pairs produced by parametric down-conversion. In this calibration scheme, the detection of a first photon triggers the measurement sequence aimed at detection of a second photon by a detector under test (DUT). We also describe measurements of radiant power with a photon-counting detector, whi...

Energy calibration of energy-resolved photon-counting pixel detectors using laboratory polychromatic x-ray beams

Recently, photon-counting detectors capable of resolving incident x-ray photon energies have been considered for use in spectral x-ray imaging applications. For reliable use of energy-resolved photon-counting detectors (ERPCDs), energy calibration is an essential procedure prior to their use because variations in responses from each pixel of the ERPCD for incident photons, even at the same ener...

Single Photon Counting Detectors for TCSPC

Photon-Counting Superconducting Detectors for Submillimeter Astronomy

We are developing superconducting direct detectors (Single Quasiparticle Photon Counter, or SQPC) for submillimeter astronomy that could detect individual photons. These devices measure the quasiparticles generated breaking Cooper-pairs by photon absorption. This photoconductive type of device could yield high quantum efficiency, few s response times, and sensitivities in the range of 10 -20 W/...