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Tytuł pozycji:

Evaluation of three-dimensional iterative image reconstruction in virtual monochromatic imaging at 40 kilo-electron volts: phantom and clinical studies to assess the image noise and image quality in comparison with other reconstruction techniques.

Tytuł:
Evaluation of three-dimensional iterative image reconstruction in virtual monochromatic imaging at 40 kilo-electron volts: phantom and clinical studies to assess the image noise and image quality in comparison with other reconstruction techniques.
Autorzy:
Ishikawa T; Department of Radiology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo 116-8567, Japan.
Suzuki S; Department of Radiology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo 116-8567, Japan.
Katada Y; Department of Radiology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo 116-8567, Japan.
Takayanagi T; Department of Radiology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
Fukui R; Department of Radiology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo 116-8567, Japan.
Yamamoto Y; Department of Radiology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo 116-8567, Japan.
Tanigaki K; Department of Radiology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo 116-8567, Japan.
Źródło:
The British journal of radiology [Br J Radiol] 2020 Jun; Vol. 93 (1110), pp. 20190675. Date of Electronic Publication: 2020 Apr 03.
Typ publikacji:
Comparative Study; Journal Article
Język:
English
Imprint Name(s):
Original Publication: London, British Institute of Radiology.
MeSH Terms:
Phantoms, Imaging*
Signal-To-Noise Ratio*
Imaging, Three-Dimensional/*methods
Radiographic Image Enhancement/*methods
Radiographic Image Interpretation, Computer-Assisted/*methods
Aged ; Female ; Humans ; Imaging, Three-Dimensional/instrumentation ; Male ; Middle Aged ; Quality Improvement ; Radiographic Image Enhancement/instrumentation ; Radiographic Image Interpretation, Computer-Assisted/instrumentation ; Retrospective Studies ; Tomography, X-Ray Computed/instrumentation ; Tomography, X-Ray Computed/methods
Entry Date(s):
Date Created: 20200327 Date Completed: 20200604 Latest Revision: 20220414
Update Code:
20240105
DOI:
10.1259/bjr.20190675
PMID:
32208973
Czasopismo naukowe
Objective: The purpose of this study was to evaluate the image quality in virtual monochromatic imaging (VMI) at 40 kilo-electron volts (keV) with three-dimensional iterative image reconstruction (3D-IIR).
Methods: A phantom study and clinical study (31 patients) were performed with dual-energy CT (DECT). VMI at 40 keV was obtained and the images were reconstructed using filtered back projection (FBP), 50% adaptive statistical iterative reconstruction (ASiR), and 3D-IIR. We conducted subjective and objective evaluations of the image quality with each reconstruction technique.
Results: The image contrast-to-noise ratio and image noise in both the clinical and phantom studies were significantly better with 3D-IIR than with 50% ASiR, and with 50% ASiR than with FBP (all, p < 0.05). The standard deviation and noise power spectra of the reconstructed images decreased in the order of 3D-IIR to 50% ASiR to FBP, while the modulation transfer function was maintained across the three reconstruction techniques. In most subjective evaluations in the clinical study, the image quality was significantly better with 3D-IIR than with 50% ASiR, and with 50% ASiR than with FBP (all, p < 0.001). Regarding the diagnostic acceptability, all images using 3D-IIR were evaluated as being fully or probably acceptable.
Conclusions: The quality of VMI at 40 keV is improved by 3D-IIR, which allows the image noise to be reduced and structural details to be maintained.
Advances in Knowledge: The improvement of the image quality of VMI at 40 keV by 3D-IIR may increase the subjective acceptance in the clinical setting.

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