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- Title
Advanced virtual monochromatic reconstruction of dual-energy unenhanced brain computed tomography in children: comparison of image quality against standard mono-energetic images and conventional polychromatic computed tomography.
- Authors
Park, Juil; Choi, Young; Cheon, Jung-Eun; Kim, Woo; Kim, In-One; Pak, Seong; Krauss, Bernhard; Choi, Young Hun; Kim, Woo Sun; Pak, Seong Yong
- Abstract
<bold>Background: </bold>Advanced virtual monochromatic reconstruction from dual-energy brain CT has not been evaluated in children.<bold>Objective: </bold>To determine the most effective advanced virtual monochromatic imaging energy level for maximizing pediatric brain parenchymal image quality in dual-energy unenhanced brain CT and to compare this technique with conventional monochromatic reconstruction and polychromatic scanning.<bold>Materials and Methods: </bold>Using both conventional (Mono) and advanced monochromatic reconstruction (Mono+) techniques, we retrospectively reconstructed 13 virtual monochromatic imaging energy levels from 40 keV to 100 keV in 5-keV increments from dual-source, dual-energy unenhanced brain CT scans obtained in 23 children. We analyzed gray and white matter noise ratios, signal-to-noise ratios and contrast-to-noise ratio, and posterior fossa artifact. We chose the optimal mono-energetic levels and compared them with conventional CT.<bold>Results: </bold>For Mono+maximum optima were observed at 60 keV, and minimum posterior fossa artifact at 70 keV. For Mono, optima were at 65-70 keV, with minimum posterior fossa artifact at 75 keV. Mono+ was superior to Mono and to polychromatic CT for image-quality measures. Subjective analysis rated Mono+superior to other image sets.<bold>Conclusion: </bold>Optimal virtual monochromatic imaging using Mono+ algorithm demonstrated better image quality for gray-white matter differentiation and reduction of the artifact in the posterior fossa.
- Subjects
DUAL energy CT (Tomography); SIGNAL-to-noise ratio; POSTERIOR cranial fossa; SCINTILLATORS; IMAGE quality analysis; ALGORITHMS; BRAIN; COMPARATIVE studies; COMPUTED tomography; DIAGNOSTIC imaging; RESEARCH methodology; MEDICAL cooperation; COMPUTERS in medicine; RADIATION doses; RESEARCH; EVALUATION research; RETROSPECTIVE studies
- Publication
Pediatric Radiology, 2017, Vol 47, Issue 12, p1648
- ISSN
0301-0449
- Publication type
journal article
- DOI
10.1007/s00247-017-3908-8