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 21st Amendment to the US Constitution was ratified on December 5, 1933. This amendment repealed the 18th amendment thereby ending prohibition.Herbert Hoover had spoken in his presidential acceptance speech in 1932 of the need to end prohibition and move forward.he 21st Amendment to the US Constitution was ratified on December 5, 1933. This amendment repealed the 18th amendment thereby ending prohibition.