Polyenergetic reconstruction mitigates streak artifacts by dual source imaging in chest photon counting detector computed tomography.

Autor: Maisuria D; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA., Chamberlin JH; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA., Baruah D; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA., Hinen S; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA., O'Doherty J; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA; Siemens Medical Solutions, Malvern, PA, USA., McGuire A; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA., Knight H; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA., Schoepf UJ; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA., Munden RF; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA., Kabakus IM; Division of Cardiovascular Imaging, Department of Radiology, Medical University of South Carolina, Charleston, SC, USA. Electronic address: kabakus@musc.edu.
Jazyk: angličtina
Zdroj: Clinical imaging [Clin Imaging] 2024 Sep; Vol. 113, pp. 110235. Date of Electronic Publication: 2024 Jul 20.
DOI: 10.1016/j.clinimag.2024.110235
Abstrakt: Objective: This study aims to assess the efficacy of polyenergetic reconstruction methods in reducing streak artifacts caused by dual source imaging in Photon Counting Detector Computed Tomography (PCD-CT) imaging, thereby improving image quality and diagnostic accuracy.
Methods: A retrospective cohort study was conducted, involving 50 patients who underwent chest Computed Tomography Angiography with PCD-CT, focusing on those with streak artifacts. Quantitative and qualitative analyses were performed on images reconstructed using monoenergetic and polyenergetic techniques. Quantitative evaluations measured the attenuation of tracheal air density in regions affected by streak artifacts, while qualitative assessments employed a modified Likert scale to rate image quality. Statistical analyses included Wilcoxon's signed-rank tests and Spearman's correlation, alongside assessments of inter-rater reliability.
Results: There was significantly lower attenuation of tracheal air density on the polyenergetic reconstructions (Median - 1010 ± 62 HU vs -930 ± 110 HU; P < 0.001), and significantly decreased variation on the polyenergetic reconstructions (Median 65.2 ± 79.5 HU vs 38.8 ± 33.9 HU; P < 0.001). The median modified-Likert scale were significantly better for the polyenergetic reconstructions (median modified-Likert 4 ± 0.5 vs 2.5 ± 1; P < 0.001). The inter-rater agreement was substantial and not significantly different between reconstructions (Gwet's ACPolyenergetic = 0.78 vs Gwet's ACVMI = 0.775).
Conclusion: Polyenergetic reconstruction significantly mitigates streak artifacts in PCD-CT imaging, enhancing quantitative and qualitative image quality. This advancement addresses a known limitation of current PCD-CT reconstruction techniques, offering a promising approach to improving diagnostic reliability and accuracy in clinical practice. We demonstrate that future software implementations can resolve this artifact.
Competing Interests: Declaration of competing interest Reginald F. Munden MD DMD holds stock in Optellum Ltd. and Therabionics. Uwe Joseph Schoepf MD received institutional research support and/or personal fees from Bayer, Bracco, Elucid Bioimaging, Guerbet, HeartFlow, Keya Medical, and Siemens. Jim O'Doherty PhD was an employee of Siemens Medical Solutions USA, Inc. The rest of the authors have no conflicts of interest to declare. All co-authors have seen and agree with the contents of the manuscript and there is no financial interest to report. We certify that the submission is original work and is not under review at any other publication.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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