1 : This entry gives the gross domestic product (GDP) or value of all final goods and services produced within a nation in a given year. 2  A nation's GDP at purchasing power parity (PPP) exchange rates is the sum value of all goods and services produced in the country valued at prices prevailing in the United States. : PPP conversion factor (GDP) to market exchange rate ratio. 2  Purchasing power parity conversion factor is the number of units of a country's currency required to buy the same amount of goods and services in the domestic market as a U.S. dollar would buy in the United States.
An MRI scan is a test to look into the neck & back, which doesnât use any radiation. Instead of radiation, MRIâs use magnetic & radio waves, creating computer generated pictures. The pictures or images produced by an MRI can show different layers of the spine and are able to show problems with soft tissues, like muscles, ligaments, spinal discs and nerves.
Some of the more frequently ordered MRI types include: A Head MRI can look at the brain for tumors, an aneurysm, bleeding in the brain, nerve injury, and other problems, such as damage caused by a stroke. A head MRI can also find problems of the eyes and optic nerves, and the ears and auditory nerves. A Chest MRI can look at the heart, the heart valves, and coronary blood vessels. It can show if the heart or lungs are damaged. An MRI of the chest may also be used to look for breast or lung cancer.