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Image-Quality Assessment of Polyenergetic and Virtual Monoenergetic Reconstructions of Unenhanced CT Scans of the Head: Initial Experiences with the First Photon-Counting CT Approved for Clinical Use

In 2021, the first clinical photon-counting CT (PCCT) was introduced. The purpose of this study is to evaluate the image quality of polyenergetic and virtual monoenergetic reconstructions in unenhanced PCCTs of the head. A total of 49 consecutive patients with unenhanced PCCTs of the head were retro...

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Autores principales: Michael, Arwed Elias, Boriesosdick, Jan, Schoenbeck, Denise, Woeltjen, Matthias Michael, Saeed, Saher, Kroeger, Jan Robert, Horstmeier, Sebastian, Lennartz, Simon, Borggrefe, Jan, Niehoff, Julius Henning
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8871064/
https://www.ncbi.nlm.nih.gov/pubmed/35204356
http://dx.doi.org/10.3390/diagnostics12020265
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author Michael, Arwed Elias
Boriesosdick, Jan
Schoenbeck, Denise
Woeltjen, Matthias Michael
Saeed, Saher
Kroeger, Jan Robert
Horstmeier, Sebastian
Lennartz, Simon
Borggrefe, Jan
Niehoff, Julius Henning
author_facet Michael, Arwed Elias
Boriesosdick, Jan
Schoenbeck, Denise
Woeltjen, Matthias Michael
Saeed, Saher
Kroeger, Jan Robert
Horstmeier, Sebastian
Lennartz, Simon
Borggrefe, Jan
Niehoff, Julius Henning
author_sort Michael, Arwed Elias
collection PubMed
description In 2021, the first clinical photon-counting CT (PCCT) was introduced. The purpose of this study is to evaluate the image quality of polyenergetic and virtual monoenergetic reconstructions in unenhanced PCCTs of the head. A total of 49 consecutive patients with unenhanced PCCTs of the head were retrospectively included. The signals ± standard deviations of the gray and white matter were measured at three different locations in axial slices, and a measure of the artifacts below the cranial calvaria and in the posterior fossa between the petrous bones was also obtained. The signal-to-noise ratios (SNRs) and contrast-to-noise ratios (CNRs) were calculated for all reconstructions. In terms of the SNRs and CNRs, the polyenergetic reconstruction is superior to all virtual monoenergetic reconstructions (p < 0.001). In the MERs, the highest SNR is found in the 70 keV MER, and the highest CNR is in the 65 keV MER. In terms of artifacts below the cranial calvaria and in the posterior fossa, certain MERs are superior to polyenergetic reconstruction (p < 0.001). The PCCT provided excellent image contrast and low-noise profiles for the differentiation of the grey and white matter. Only the artifacts below the calvarium and in the posterior fossa still underperform, which is attributable to the lack of an artifact reduction algorithm in image postprocessing. It is conceivable that the usual improvements in image postprocessing, especially with regard to glaring artifacts, will lead to further improvements in image quality.
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spelling pubmed-88710642022-02-25 Image-Quality Assessment of Polyenergetic and Virtual Monoenergetic Reconstructions of Unenhanced CT Scans of the Head: Initial Experiences with the First Photon-Counting CT Approved for Clinical Use Michael, Arwed Elias Boriesosdick, Jan Schoenbeck, Denise Woeltjen, Matthias Michael Saeed, Saher Kroeger, Jan Robert Horstmeier, Sebastian Lennartz, Simon Borggrefe, Jan Niehoff, Julius Henning Diagnostics (Basel) Article In 2021, the first clinical photon-counting CT (PCCT) was introduced. The purpose of this study is to evaluate the image quality of polyenergetic and virtual monoenergetic reconstructions in unenhanced PCCTs of the head. A total of 49 consecutive patients with unenhanced PCCTs of the head were retrospectively included. The signals ± standard deviations of the gray and white matter were measured at three different locations in axial slices, and a measure of the artifacts below the cranial calvaria and in the posterior fossa between the petrous bones was also obtained. The signal-to-noise ratios (SNRs) and contrast-to-noise ratios (CNRs) were calculated for all reconstructions. In terms of the SNRs and CNRs, the polyenergetic reconstruction is superior to all virtual monoenergetic reconstructions (p < 0.001). In the MERs, the highest SNR is found in the 70 keV MER, and the highest CNR is in the 65 keV MER. In terms of artifacts below the cranial calvaria and in the posterior fossa, certain MERs are superior to polyenergetic reconstruction (p < 0.001). The PCCT provided excellent image contrast and low-noise profiles for the differentiation of the grey and white matter. Only the artifacts below the calvarium and in the posterior fossa still underperform, which is attributable to the lack of an artifact reduction algorithm in image postprocessing. It is conceivable that the usual improvements in image postprocessing, especially with regard to glaring artifacts, will lead to further improvements in image quality. MDPI 2022-01-21 /pmc/articles/PMC8871064/ /pubmed/35204356 http://dx.doi.org/10.3390/diagnostics12020265 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Michael, Arwed Elias
Boriesosdick, Jan
Schoenbeck, Denise
Woeltjen, Matthias Michael
Saeed, Saher
Kroeger, Jan Robert
Horstmeier, Sebastian
Lennartz, Simon
Borggrefe, Jan
Niehoff, Julius Henning
Image-Quality Assessment of Polyenergetic and Virtual Monoenergetic Reconstructions of Unenhanced CT Scans of the Head: Initial Experiences with the First Photon-Counting CT Approved for Clinical Use
title Image-Quality Assessment of Polyenergetic and Virtual Monoenergetic Reconstructions of Unenhanced CT Scans of the Head: Initial Experiences with the First Photon-Counting CT Approved for Clinical Use
title_full Image-Quality Assessment of Polyenergetic and Virtual Monoenergetic Reconstructions of Unenhanced CT Scans of the Head: Initial Experiences with the First Photon-Counting CT Approved for Clinical Use
title_fullStr Image-Quality Assessment of Polyenergetic and Virtual Monoenergetic Reconstructions of Unenhanced CT Scans of the Head: Initial Experiences with the First Photon-Counting CT Approved for Clinical Use
title_full_unstemmed Image-Quality Assessment of Polyenergetic and Virtual Monoenergetic Reconstructions of Unenhanced CT Scans of the Head: Initial Experiences with the First Photon-Counting CT Approved for Clinical Use
title_short Image-Quality Assessment of Polyenergetic and Virtual Monoenergetic Reconstructions of Unenhanced CT Scans of the Head: Initial Experiences with the First Photon-Counting CT Approved for Clinical Use
title_sort image-quality assessment of polyenergetic and virtual monoenergetic reconstructions of unenhanced ct scans of the head: initial experiences with the first photon-counting ct approved for clinical use
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8871064/
https://www.ncbi.nlm.nih.gov/pubmed/35204356
http://dx.doi.org/10.3390/diagnostics12020265
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