نتایج جستجو برای: simplified dynamic phantom

تعداد نتایج: 468909  

Journal: :Japanese Journal of Radiological Technology 1995

2016
Giuseppe Ruvio Antonio Cuccaro Raffaele Solimene Adriana Brancaccio Bruno Basile Max J. Ammann

This Letter introduces a feasibility study of a scanning system for applications in biomedical bone imaging operating in the microwave range 0.5-4 GHz. Mechanical uncertainties and data acquisition time are minimised by using a fully automated scanner that controls two antipodal Vivaldi antennas. Accurate antenna positioning and synchronisation with data acquisition enables a rigorous proof-of-...

Journal: :Physics in medicine and biology 2013
Hugo de las Heras Felix Schöfer Britta Tiller Margarita Chevalier Georg Zwettler Friedrich Semturs

A phantom for image quality evaluation of digital mammography systems is presented and compared to the most widely used phantoms in Europe and the US. The phantom contains objects for subjective detection of Landolt rings (four-alternative, forced-choice task) and for objective calculation of signal-difference-to-noise ratios (SDNR), both in a titanium background within a 12-step wedge. Evaluat...

Journal: :Journal of experimental psychology. Learning, memory, and cognition 2008
Christoph Stahl Karl Christoph Klauer

The distinction between verbatim and gist memory traces has furthered the understanding of numerous phenomena in various fields, such as false memory research, research on reasoning and decision making, and cognitive development. To measure verbatim and gist memory empirically, an experimental paradigm and multinomial measurement model has been proposed but rarely applied. In the present articl...

Journal: :Diagnostics 2015
Naoki Ohno Tosiaki Miyati Makiko Yamashita Mayu Narikawa

Our purpose in this study was to assess the relationship between contrast signal intensity (CI) and concentration of perflubutane microbubbles in a phantom experiment, and to examine the feasibility of this technique for quantitative analysis of vascularity in hepatocellular carcinoma (HCC). Microbubble solutions of the perflubutane contrast agent were prepared by mixing with purified water. We...

2012
Melanie Peladeau-Pigeon

Dynamic Contrast Enhanced Computed Tomography is an imaging tool that aids in evaluating functional characteristics in different stages of disease assessment: diagnostic, treatment effectiveness and monitoring. At the present time, following all the technological advances, there remains no universally validated method of quantitative, non-invasive, perfusion imaging. In order to address this ch...

Journal: :Neuroreport 2010
Vilayanur S Ramachandran David Brang Paul D McGeoch

After amputation of an arm the sensory map of the body changes radically, causing the sensory input from face to 'invade' the original hand area in the brain. As a result, touching the face of the amputee evokes tactile sensations on the phantom. These sensory referrals from the face to phantom hand occur in a stable, topographically organized manner. We now find that volitional movements of th...

2005
R. H. Olsher

The detonation of an improvised nuclear device or a radioactive dispersal device (RDD) would lead to widespread radioactive contamination, including the potential contamination of individuals. If such an event were to happen, it would be desirable to have various means of rapidly scanning individuals to determine if they have either external or internal contamination and to be able to determine...

2009
Jan Wienold

In non-residential buildings, comfort and energy demand for heating, cooling and lighting are significantly influenced by the façade. Up to now, only non-weighted luminance-based methods for calculating and evaluating annual daylight glare exist (Lee et al., 2005; Mardaljevic and Lomas., 1998). Within this paper, different methods based on the daylight glare probability DGP (Wienold and Christo...

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