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OBJECTIVE We evaluated the sensitivity of pulsed Arterial Spin Labelling (pASL) for the detection of changes in regional cerebral blood perfusion (CBP) during and after intra-venous (i.v.) infusion of an opioid agonist (fentanyl) and an opioid antagonist (naloxone). MATERIALS AND METHODS Twenty-three subjects were scanned four times, receiving i.v.(More)
High field MRI of the brain occasionally exhibits imaging artifacts; most artifacts are obvious and easily recognized, but some are subtle and mimic disease. A thorough understanding of brain MRI artifacts is important to avoid potential diagnostic pitfalls. Some imaging techniques or procedures could be utilized to remove or identify artifacts. These(More)
The development of more efficient sanitizers for reducing the biofilm produced by pathogenic bacteria is of great importance, especially in the food industry. The aim of this study was to conduct a preliminary evaluation of the efficiency of oleuropein (OLE), extracted from olive leaves, and peracetic acid (PAA), alone or in combination, to inactivate(More)
A data-driven fMRI (functional magnetic resonance imaging) analysis method is proposed to detect responses when no clear a priori information is available to predict response onset or duration in a single-event or non-repetitive multi-event experiment. It is developed from pre-existing temporal clustering analysis methods with the applications of digital(More)
This paper provides evidence that multiple acoustic cues involving the presence of low-frequency energy integrate in the perception of Korean coronal fricatives. This finding helps explain a surprising asymmetry between the production and perception of these fricatives found in previous studies: lower F0 onset in the following vowel leads to a response bias(More)
Functional magnetic resonance imaging (fMRI) is a popular tool for studying brain activity due to its non-invasiveness. Conventionally an expected response needs to be available for correlating with fMRI time series in model-driven analysis, which limits experimental paradigms to blocked and event-related designs. To study neu-ronal responses due to slow(More)
—Functional magnetic resonance imaging (fMRI) is one of the most widely used methods to study neuronal activity in human brain. A data-driven analysis method is proposed for studying brain responses when the information for predicting their onset or duration is unavailable. The method is suitable for experiments involving a single event or non-repetitive(More)