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Publication . Article . Other literature type . 2020

Comparing image quality of single- and dual-energy computed tomography of the brain

Doris Dodig; Slavica Kovačić; Zrinka Matana Kaštelan; Iva Žuža; Filip Benić; Jurković Slaven; Damir Miletić; +1 Authors
Open Access
Published: 21 Apr 2020
Country: Croatia
Purpose Weighted average dual-energy computed tomography (DE-CT) reconstructions are considered a proxy of standard CT images of the brain, recommended for routine clinical use and used as a reference standard in DE-CT research. However, their image quality has not been assessed, which was the aim of our study. Methods Images from 81 consecutive patients who underwent both non-contrast single-energy (SE)-CT and DE-CT of the brain on the same scanner were retrospectively evaluated. Attenuation values (HU) and SD of grey matter/white matter (GM/WM) pairs, along with SD in the posterior fossa and subcalvarial region were measured. Four readers evaluated image noise, GM/WM contrast, posterior fossa and subcalvarial artefacts, as well as overall image quality. Results Weighted average DE-CT GM and WM HU were significantly lower and noise higher compared to SE-CT (GM HU 36.46 v. 41.82; WM HU 28.18 v. 29.94; GM SD 2.93 v. 2.49; and WM SD 3.16 v. 2.44, all p < 0.0001). After correcting the measured SE-CT noise for 37% higher acquisition dose, DE-CT GM noise became significantly lower (2.93 v. 3.11, p = 0.0121). Measured and dose corrected SE-CT GM/WM contrast-to-noise ratio was superior to weighted average DE-CT (3.42 and 2.74 v. 1.95, both p < 0.0001). Weighted average DE-CT had significantly less artifacts on qualitative analysis. Conclusion Weighted average DE-CT images of the brain yield less artefacts at 37% dose reduction and lower noise at SE-CT equivalent dose. Dose-adjusted GM/WM contrast-to-noise ratio of weighted average DE-CT with 0.4 weighting factor remains inferior to SE-CT images.
Subjects by Vocabulary

Microsoft Academic Graph classification: Nuclear medicine business.industry business Image quality Computer science Computed tomography medicine.diagnostic_test medicine Dual-Energy Computed Tomography


Brain ; artefacts ; dual-energy computed tomography ; image quality, Brain, artefacts, dual-energy computed tomography, image quality, BIOMEDICINA I ZDRAVSTVO. Kliničke medicinske znanosti. Radiologija., BIOMEDICINE AND HEALTHCARE. Clinical Medical Sciences. Radiology., Neurology (clinical), Radiology, Nuclear Medicine and imaging, General Medicine, Imaging of Neurological Diseases

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Europe PubMed Central
Other literature type . 2020
Providers: PubMed Central