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Ever since the introduction of the iron lung in treating polio victims, mechanical ventilators have kept patients alive during times of acute respiratory failure. Intensive care medicine is the branch of medicine focused around the Intensive care unit (ICU), which utilizes mechanical ventilators to support and in some cases replace respiratory function in patients with respiratory failure

Many world-class research centers are dedicated to using fMRI as the main tool of investigation. fMRI has not only focused on cognitive research but also social research, for instance, how the brain reacts to advertising or pictures of people of different ethnicities. In fact, fMRI has been applied to almost every aspect of brain research since its inception.

From 2009 to 2010, the world experienced a severe, worldwide shortage of the radioisotope technetium-99 (tech99) when the Chalk River Plant in Ontario, Canada shut down for more than a year due to water leaks. The Canadian plant, along with one in Petten, Netherlands, is responsible for two thirds of the world supply of the radioisotope.

The explosive spread of CT can be attributed to its speed and diagnostic benefits. Recently it was estimated that more than 70 million CT examinations were performed each year in the United States. Although it accounts for only about one tenth of total radiologic examinations, CT is responsible for more than two thirds of the total radiation dose associated with medical imaging.