Positron emission tomography (PET) is a test that uses a special type of camera and a tracer (radioactive chemical) to look at organs in the body. The tracer usually is a special form of a substance (such as glucose) that collects in cells that are using a lot of energy, such as cancer cells.
The Eleventh Amendment was ratified in 1798 in order to overrule the Supreme Courtâs decision that a South Carolina citizen could sue the state of Georgia for money damages.he Eleventh Amendment was ratified in 1798 in order to overrule the Supreme Courtâs decision that a South Carolina citizen could sue the state of Georgia for money damages.
The Amendment was the first to set a time delay before it would take effect following ratification, and the first to set a time limit for its ratification by the states.Its ratification was certified on January 16, 1919, with the amendment taking effect on January 17, 1920.he Amendment was the first to set a time delay before it would take effect following ratification, and the first to set a time limit for its ratification by the states.