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PET imaging with 18F-FDG takes advantage of the fact that the brain is normally a rapid user of glucose. Standard 18F-FDG PET of the brain measures regional glucose use and can be used in neuropathological diagnosis. Example: Brain pathologies such as Alzheimer's disease greatly decrease brain metabolism of both glucose and oxygen in tandem ...
Functional magnetic resonance imaging data. Functional neuroimaging is the use of neuroimaging technology to measure an aspect of brain function, often with a view to understanding the relationship between activity in certain brain areas and specific mental functions.
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 is a type of nuclear medicine procedure that measures the metabolic activity of the cells of body tissues. [7] During the study, participants underwent PET of the head while completing different cognitive tasks such as Raven's Advanced Progressive Matrices (RAPM) and Continuous Performance Tests (CPT). The PET Scans showed that task ...
A CT scan can be performed in under a second and produce rapid results for clinicians, with its ease of use leading to an increase in CT scans performed in the United States from 3 million in 1980 to 62 million in 2007. Clinicians oftentimes take multiple scans, with 30% of individuals undergoing at least 3 scans in one study of CT scan usage. [36]
Studies have been conducted by administering a positron emission tomography (PET) scan and asking participants to engage in perspective-taking tasks. For example, in one study, participants who were all medical students were asked to consider the knowledge base someone who was not in the medical field would have on a list of medical questions. [41]
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For example, PET scans have shown that when subjects, seated in a room, imagine they are at their front door starting to walk either to the left or right, activation begins in the visual association cortex, the parietal cortex, and the prefrontal cortex—all higher cognitive processing centers of the brain. [26]