2016
DOI: 10.6009/jjrt.2016_jsrt_72.2.157
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The Detectability of Iterative CT Reconstruction for Low-contrast Lesions in Hyperacute Cerebral Infarction: Assessment with Newly Developed Dedicated Head Phantoms

Abstract: SummaryIterative reconstruction techniques, such as adaptive statistical iterative reconstruction (ASiR), improve the contrast-to-noise ratio of computed tomography (CT) images; however, underlying anatomical structures may nevertheless hamper detectability of low-contrast areas in clinical situations, despite using such a technique. We therefore conducted a phantom study to investigate the efficacy of ASiR in improving the detectability of lowcontrast areas in the presence of brain anatomical structures. We d… Show more

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“…We initially attempted to understand this characteristic using a commercially available phantom, but no phantom separates gray matter and white matter. Development and analysis results of a phantom expressing early ischemic change by changing the density of the substance have been reported [30], but the influence of differences in atomic number on CT value was not considered. Moreover, in Report 44 of the ICRU, the mass attenuation coefficients of gray matter and white matter were equal [31].…”
Section: Discussionmentioning
confidence: 99%
“…We initially attempted to understand this characteristic using a commercially available phantom, but no phantom separates gray matter and white matter. Development and analysis results of a phantom expressing early ischemic change by changing the density of the substance have been reported [30], but the influence of differences in atomic number on CT value was not considered. Moreover, in Report 44 of the ICRU, the mass attenuation coefficients of gray matter and white matter were equal [31].…”
Section: Discussionmentioning
confidence: 99%