Spectral Signatures of X-ray Scatter Using Energy-Resolving Photon-Counting Detectors
Energy-resolving photon-counting detectors (PCDs) separate photons from a polychromatic X-ray source into a number of separate energy bins. This spectral information from PCDs would allow advancements in X-ray imaging, such as improving image contrast, quantitative imaging, and material identificati...
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doaj-25c850e68a674c3284ac18f28e54cca42020-11-25T02:12:18ZengMDPI AGSensors1424-82202019-11-011922502210.3390/s19225022s19225022Spectral Signatures of X-ray Scatter Using Energy-Resolving Photon-Counting DetectorsCale E. Lewis0Mini Das1Department of Physics, University of Houston, Houston, TX 77204, USADepartment of Physics, University of Houston, Houston, TX 77204, USAEnergy-resolving photon-counting detectors (PCDs) separate photons from a polychromatic X-ray source into a number of separate energy bins. This spectral information from PCDs would allow advancements in X-ray imaging, such as improving image contrast, quantitative imaging, and material identification and characterization. However, aspects like detector spectral distortions and scattered photons from the object can impede these advantages if left unaccounted for. Scattered X-ray photons act as noise in an image and reduce image contrast, thereby significantly hindering PCD utility. In this paper, we explore and outline several important characteristics of spectral X-ray scatter with examples of soft-material imaging (such as cancer imaging in mammography or explosives detection in airport security). Our results showed critical spectral signatures of scattered photons that depend on a few adjustable experimental factors. Additionally, energy bins over a large portion of the spectrum exhibit lower scatter-to-primary ratio in comparison to what would be expected when using a conventional energy-integrating detector. These important findings allow flexible choice of scatter-correction methods and energy-bin utilization when using PCDs. Our findings also propel the development of efficient spectral X-ray scatter correction methods for a wide range of PCD-based applications.https://www.mdpi.com/1424-8220/19/22/5022x-ray scatterphoton-counting detectorsimagingcompton scatter |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Cale E. Lewis Mini Das |
spellingShingle |
Cale E. Lewis Mini Das Spectral Signatures of X-ray Scatter Using Energy-Resolving Photon-Counting Detectors Sensors x-ray scatter photon-counting detectors imaging compton scatter |
author_facet |
Cale E. Lewis Mini Das |
author_sort |
Cale E. Lewis |
title |
Spectral Signatures of X-ray Scatter Using Energy-Resolving Photon-Counting Detectors |
title_short |
Spectral Signatures of X-ray Scatter Using Energy-Resolving Photon-Counting Detectors |
title_full |
Spectral Signatures of X-ray Scatter Using Energy-Resolving Photon-Counting Detectors |
title_fullStr |
Spectral Signatures of X-ray Scatter Using Energy-Resolving Photon-Counting Detectors |
title_full_unstemmed |
Spectral Signatures of X-ray Scatter Using Energy-Resolving Photon-Counting Detectors |
title_sort |
spectral signatures of x-ray scatter using energy-resolving photon-counting detectors |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2019-11-01 |
description |
Energy-resolving photon-counting detectors (PCDs) separate photons from a polychromatic X-ray source into a number of separate energy bins. This spectral information from PCDs would allow advancements in X-ray imaging, such as improving image contrast, quantitative imaging, and material identification and characterization. However, aspects like detector spectral distortions and scattered photons from the object can impede these advantages if left unaccounted for. Scattered X-ray photons act as noise in an image and reduce image contrast, thereby significantly hindering PCD utility. In this paper, we explore and outline several important characteristics of spectral X-ray scatter with examples of soft-material imaging (such as cancer imaging in mammography or explosives detection in airport security). Our results showed critical spectral signatures of scattered photons that depend on a few adjustable experimental factors. Additionally, energy bins over a large portion of the spectrum exhibit lower scatter-to-primary ratio in comparison to what would be expected when using a conventional energy-integrating detector. These important findings allow flexible choice of scatter-correction methods and energy-bin utilization when using PCDs. Our findings also propel the development of efficient spectral X-ray scatter correction methods for a wide range of PCD-based applications. |
topic |
x-ray scatter photon-counting detectors imaging compton scatter |
url |
https://www.mdpi.com/1424-8220/19/22/5022 |
work_keys_str_mv |
AT caleelewis spectralsignaturesofxrayscatterusingenergyresolvingphotoncountingdetectors AT minidas spectralsignaturesofxrayscatterusingenergyresolvingphotoncountingdetectors |
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