An MRI is a test that uses a magnetic field and pulses of radio wave energy to make pictures of the spine. In many cases, an MRI gives different information than an X-ray, an ultrasound, or a CT scan. An MRI also may show problems that cannot be seen with other imaging tests.
Note: A general discussion of the causes of the subprime mortgage crisis is included in Subprime mortgage crisis, Causes and Causes of the 2007â2012 global financial crisis. This article focuses on a subset of causes related to affordable housing policies, Fannie Mae and Freddie Mac and government regulation.
The U.S. economic crisis. THE U.S. economy is currently experiencing its worst crisis since the Great Depression. The crisis started in the home mortgage market, especially the market for so-called âsubprimeâ mortgages, and is now spreading beyond subprime to prime mortgages, commercial real estate, corporate junk bonds, and other forms of debt.