² The data show an axial section through the head, acquired on a Siemens Quantum whole-body MRI scanner with a 1.5 Tesla magnet, using a standard one-channel circularly polarized head coil and a Gradient Recalled Echo pulse sequence with T_E/T_R = 4.1/135 ms, 40-degree flip angle, 133 KHz bandwidth, 5 mm slice thickness, 23×23 mm field of view. Sixteen slices were acquired in 35 seconds. Data courtesy of Drs. Stephan Kannengiesser and Oliver Heid, Siemens Medical Solutions, MR Division, Erlangen, Germany.