<qa>  What is the name of the MRI scanner?- Magnetic resonance imaging MRI: Participants perform the same procedures as described above for Part 1 while undergoing MRI of the brain. For this test, the subject lies on a table inside the MRI scanner - a narrow cylindrical tube with a strong magnetic field. Scanning time varies from 20 minutes to 3 hours, with most scans lasting between 45 and 90 minutes. Earphones are used to hear the words for this test instead of a loudspeaker. 