Comparative assessment of the influences of iterative model reconstruction (IMR) and hybrid-iterative reconstruction (HIR) on image quality of 256-slice coronary computed tomography angiography

(2020) Comparative assessment of the influences of iterative model reconstruction (IMR) and hybrid-iterative reconstruction (HIR) on image quality of 256-slice coronary computed tomography angiography. Journal of Isfahan Medical School. pp. 1325-1332. ISSN 10277595 (ISSN)

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Abstract

Background: The aim of this study was to evaluate the influences of iterative model reconstruction (IMR) and hybrid-iterative reconstruction (HIR) techniques on quantitative and qualitative image analysis of 256-slice coronary computed tomography angiography (CCTA). Methods: Sixty-one patients (30 men and 31 women with mean age of 60.68 ± 9.13 years) who had undergone CCTA by the 256-slice CT scanner were evaluated. The raw data were reconstructed using HIR and IMR algorithms. For objective assessment of image quality, parameters of noise, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were obtained for both reconstruction algorithms. For subjective assessment, two physician specialists evaluated image quality using a 5-point scale. Findings: The mean image noise on HIR and IMR images was 32.74 ± 6.04 and 25.15 ± 3.59, respectively. In IMR, the CNR method (28.81 ± 5.13) was significantly better than HIR method (23.06 ± 5.03) (P < 0.001). However, the HIR method (4.62 ± 0.39) was higher than the IMR method (4.48 ± 0.45) in terms of qualitative or subjective criteria (P < 0.001). Conclusion: The IMR method can improve quantitative criteria of image, reduce noise, and increase SNR and CNR of images better than HIR method. However, the images which reconstructed by HIR were superior to IMR in terms of qualitative criteria. © 2020 Isfahan University of Medical Sciences(IUMS). All rights reserved.

Item Type: Article
Keywords: Computed tomography angiography Coronary vessels Image quality enhancement Image reconstruction adult Article computed tomographic angiography contrast to noise ratio coronary angiography coronary artery disease female human hybrid iterative reconstruction image quality major clinical study male middle aged model based iterative reconstruction signal noise ratio
Subjects: WN Radiology. Diagnostic Imaging
Divisions: Faculty of Medicine > Department of Basic Science > Department of Medical Physics
Faculty of Medicine > Departments of Clinical Sciences > Department of Internal
Faculty of Paramedical > Department of Radiology
Other
Page Range: pp. 1325-1332
Journal or Publication Title: Journal of Isfahan Medical School
Journal Index: Scopus
Volume: 37
Number: 554
Identification Number: https://doi.org/10.22122/jims.v37i554.12563
ISSN: 10277595 (ISSN)
Depositing User: Zahra Otroj
URI: http://eprints.mui.ac.ir/id/eprint/12220

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