Virtual versus true non-contrast images of the brain from spectral detector CT: comparison of attenuation values and image quality
| Autor: | Rivka Kessner, Jennifer Sommer, Nils Große Hokamp, Kai R. Laukamp, Ameya Nayate |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Acta Radiologica. 64:776-783 |
| ISSN: | 1600-0455 0284-1851 |
| DOI: | 10.1177/02841851221093763 |
| Popis: | Background Prior studies focused on utilization of dual-energy computed tomography (DECT) to better detect intracranial pathology and to reduce artifacts. It is still unclear whether virtual non-contrast (VNC) images of DECT can replace true non-contrast (TNC) images. Purpose To compare attenuation values and image quality of VNC images to TNC images of the brain, obtained using spectral detector CT (SDCT). Material and Methods We retrospectively evaluated patients that underwent head CT with and without contrast material, on a SDCT scanner at our institution (n = 33). The attenuation values of different brain structures were obtained from TNC images, the conventional images of the post-contrast exams (n = 16) or the CT angiography (CTA) (n = 17), and the derived VNC images. In total, 591 regions of interest were obtained, including white and gray matter. Two neuroradiologists independently evaluated the image quality of the VNC and TNC images, using a 5-point Likert scale. Results The mean difference between the attenuation values on the VNC versus the TNC images was Conclusion Our results show minor differences between attenuation values of different brain structures on VNC versus TNC images of SDCT. |
| Databáze: | OpenAIRE |
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