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

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 o...

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Bibliographic Details
Published in:The neuroradiology journal 2020-06, Vol.33 (3), p.259-266
Main Authors: Dodig, Doris, Kovačić, Slavica, Matana Kaštelan, Zrinka, Žuža, Iva, Benić, Filip, Slaven, Jurković, Miletić, Damir, Rumboldt, Zoran
Format: Article
Language:English
Subjects:
Imaging of Neurological Diseases
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Summary: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 
ISSN:1971-4009
2385-1996
DOI:10.1177/1971400920920785