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With both PET-CT and PET-MR the intended advantage is to combine functional imaging provided by PET, with structural information from CT or MRI. Although images from different modalities collected at different scanning sessions can be overlaid by image registration , a simultaneous acquisition offers better alignment of images and direct ...
Within fMRI methodology, there are two different ways that are typically employed to present stimuli. One method is a block related design, in which two or more different conditions are alternated in order to determine the differences between the two conditions, or a control may be included in the presentation occurring between the two conditions.
Positron emission tomography (PET) [1] is a functional imaging technique that uses radioactive substances known as radiotracers to visualize and measure changes in metabolic processes, and in other physiological activities including blood flow, regional chemical composition, and absorption.
PET, fMRI, fNIRS and fUS can measure localized changes in cerebral blood flow related to neural activity. These changes are referred to as activations . Regions of the brain which are activated when a subject performs a particular task may play a role in the neural computations which contribute to the behaviour.
Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to generate pictures of the anatomy and the physiological processes inside the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to form images of the organs in the body.
The study was used to highlight the need for more careful statistical analyses in fMRI research, given the large number of voxels in a typical fMRI scan and the multiple comparisons problem. [124] [125] Before the controversies were publicized in 2010, between 25 and 40% of studies on fMRI being published were not using the corrected comparisons.
Food safety (or food hygiene) is used as a scientific method/discipline describing handling, preparation, and storage of food in ways that prevent foodborne illness.The occurrence of two or more cases of a similar illness resulting from the ingestion of a common food is known as a food-borne disease outbreak. [1]
The food training organization provides a blueprint for career-spanning, standards-based training curriculum that could raise the standard of food training nationwide. In 2009, The Training Institute was established after government, academic, industry, and national food safety groups collaborated, prompted by the melamine incident in 2007.