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 NBER did not give any reasons or causes of the recession. But it is widely accepted that the housing downturn, which started in 2006, is a primary cause of the broader economic malaise. The fall of housing prices from peak levels reached earlier this decade cut deeply into home building and home purchases.