What is an MRI?

Magnetic resonance imaging (MRI) is a test that uses a magnetic field and pulses of radio wave energy to make images of organs and structures inside the body.  For this test, the area of the body being studied is placed inside a special machine containing a strong magnet, from which digital images are produced.  In some cases, contrast material may be used during the MRI scan to show certain structures and abnormal tissue more clearly.  MRI of the brain is done yearly as the standard of care for children with TSC to monitor cortical tubers, subependymal nodules and to look for the development of SEGAs.