Search results for "Contrast"

Diagnostic accuracy of 64-slice CT in the assessment of coronary stents

2007

PURPOSE: The purpose of this study was to assess the diagnostic accuracy of 64-slice computed tomography (64-CT) coronary angiography in the detection of coronary in-stent restenosis. MATERIALS AND METHODS: Ninety-five patients (72 men and 23 women, mean age 58+/-8 years) with previous percutaneous coronary intervention with stenting and suspected restenosis underwent 64-CT (Sensation 64, Siemens). The mean time between stent deployment and 64-CT was 6.1+/-4.2 months. The scan parameters were: slices 32 x 2, individual detector width 0.6 mm, rotation time 0.33 s, feed 3.84 mm/rotation, 120 kV, 900 mAs. After the intravenous administration of iodinated contrast material (Iomeprol 400 mgI/ml,…

Prognostic Role of Late Gadolinium Enhancement in Patients With Hypertrophic Cardiomyopathy and Low-to-Intermediate Sudden Cardiac Death Risk Score

2019

Sudden cardiac death (SCD) is the most life-threating complication of hypertrophic cardiomyopathy. Guidelines of the European Society of Cardiology (ESC) suggest the implantation of an implantable cardioverter defibrillator in primary prevention according to a 5-year risk SCD score >= 6%. The aim of the study is to evaluate the prognostic role of late gadolinium enhancement (LGE) in patients with a 5-year risk SCD score <6%. In this multicenter study, we performed cardiac magnetic resonance in 354 consecutive hypertrophic cardiomy-opathy patients (257 males, range of age 54 +/- 17) with a risk SCD score <6% (302 with <4% and 52 with >= 4 and <6% risk). Hard cardiac events,…

Phoneme processing skills are reflected in children's MMN responses.

2017

Phonological awareness (PA), the core contributor in phoneme processing abilities, has a link to later reading skills in children. However, the associations between PA and neural auditory discrimination are not clear. We used event-related potential (ERP) methodology and neuropsychological testing to monitor the neurocognitive basis of phonological awareness in typically developing children. We measured 5–6-year-old children's (N=70) phoneme processing, word completion and perceptual reasoning skills and compared their test results to their brain responses to phonemic changes, separately for each test. We found that children performing better in Phoneme processing test showed larger mismatc…

Chromatic-achromatic perimetry in four clinic cases: Glaucoma and diabetes

2015

Color perimetry has interesting clinical application for the diagnosis and detection of certain eye conditions, due to the variations that certain diseases can cause in chromatic thresholds, both in the red-green (RG) and the blue-yellow (BY) pathways.[1,2,3,4] The separate study of the visual function of both the chromatic and achromatic mechanisms could be more efficient in detecting sensitivity variations, and such variations would not be obscured by the intrusion of other mechanisms. Currently, the supply of conventional perimeters that are capable of performing a chromatic perimetry test is very limited and with reduced options regarding the possibility of choosing the physical charact…

Effect of sport-tinted contact lenses for contrast enhancement on retinal straylight measurements

2008

PURPOSE: To investigate the effect of two tinted contact lenses (CL) designed for outdoor sports activity on the psychometric determination of retinal straylight using the compensation comparison method. METHODS: Thirteen emmetropic subjects were randomly fitted with two different tinted Nike Maxsight (Bausch & Lomb, Rochester, NY, USA) CL in one eye, while the contralateral eye was fitted with a clear lens made of the same material (Optima 38, Bausch & Lomb). Three valid straylight measurements were taken on each eye before and a few minutes after lens insertion, when lens stabilization had occurred. RESULTS: The subjects' mean straylight values were 0.90 +/- 0.09 at baseline and 0.95 +/- …

A bootstrap approach to analyse productivity growth in European banking

2010

This paper analyses productivity growth for European banks over the 1995–2001 period. In contrast to previous literature, our study covers the majority of current European Union (EU) countries—all except Greece and those joining the EU in 2004. We also use resampling methods so as to gain statistical precision, which turns out to be especially important due to the limitations of the database. In order to be consistent, we use additional nonparametric methods to disentangle why productivity differentials might exist. Results show that productivity growth has occurred in most countries, mainly due to improvements in production possibilities. The bootstrap analysis yields further evidence give…

Do firms benefit from interactions with public research organisations beyond innovation? An analysis of small firms

2021

Abstract In this paper we argue that there is an extensive number of studies examining how firms obtain new products from their interactions with scientific agents, but other type of benefits has been overlooked. Specifically, we add to previous literature by considering not only product innovation, but also exploratory (long-term) and exploitative (short-term) results. We administer a tailored survey to firms collaborating with the Spanish National Research Council (CSIC) and data was completed with secondary sources. Results based on a sample of 756 firms suggest that firms consider all types of result as moderately important to them. Moreover, we observe that small firms report higher be…

2020

Abstract This paper compares the explanatory power of consumer engagement (CE) regarding service continuance intention with the variables of attitude (utilitarian and hedonic) and satisfaction. Survey data were collected from users of mobile music (n = 596) and mobile parking (n = 297) services. The partial least squares method was applied to analyze the data. In line with expectations, the findings show that attitude and satisfaction are superior drivers of service continuance intention compared to CE when service is used for utilitarian reasons. In contrast, when service consumption is driven by hedonic reasons, CE is a stronger driver than satisfaction. However, no evidence for the super…

Consumers' brand heritage experience: between acceptance and resistance

2020

International audience; The literature dedicated to heritage experience and brand heritage defends the idea that it is a source of significant value creation for consumers and brands. By contrast, the aim of this article is to propose a more complete view of the consequences of the heritage strategy for brands and consumers by exploring how consumers perceive a brand heritage experience and by identifying potential resistances that may emerge during their visits. In consequence, this research examines the features of a brand heritage experience through extended case studies in two brand museums with narratives of 47 visitors. By unpacking a brand heritage experience, the study highlights it…

Selecting information to answer questions: Strategic individual differences when searching texts

2011

The purpose of the study was to explore students’ selection of information strategies in a task-oriented reading situation. 72 secondary school students read two texts and answered six questions per text, three of which were manipulated to induce a misleading matching between the wording of the question and distracting pieces of information in the text. The reading and question-answering were presented with the software Read&Answer. We analyzed how skilled and less-skilled comprehenders were attracted to the distracting pieces of information and how this affected reading patterns and task outcomes. Skilled comprehenders scored higher and were able to discard the distracting information. In …