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 financial crisis of 2007â09, also known as the global financial crisis and the 2008-09 financial crisis, is considered by many economists to have been the worst financial crisis since the Great Depression of the 1930s. The precipitating factor was a high default rate in the subprime home mortgage sector.