Use of a 3 Tesla and 7 Tesla Magnetic Resonance Imaging Systems to Image Normal Volunteers

The purpose of this study is to determine which new magnetic resonance sequences provide better, faster and more useful information. A sequence is a distinct method of obtaining magnetic resonance (MR) images. A magnetic resonance imaging (MRI) exam is made up of many different imaging sequences. These new sequences will be implemented on either on a 3 Tesla (3T) MR system, a 7 Tesla (7T) MR system (single- or multi- transmit), or both. Since the signal-to-noise ratio for MR images is highly dependent on the magnetic field strength, the anticipated signal-to-noise will be 7T greater than 3T and 3T greater than 1.5T systems. The 3T MR system is FDA approved whereas the 7T system is not FDA approved, but is built to the same standards as other FDA approved scanners. In addition, the FDA has approved magnetic field strength up to 8T for human imaging. Participants will be told ahead