A diagnostic imaging device includes a signal processing circuit processes signals from a detector array which detects radiation from an imaging region. The bearing includes an inner ring and an outer ring concentrically arranged about an axis of rotation. The method also includes determining a network of forces for stabilizing a tensegrity structure corresponding to the desired tensegrity structure, based on the user-selected building blocks and their connections, and generating a simulation of the tensegrity structure corresponding to the desired tensegrity structure for display to the user. This digital image on the storage device is converted into television signals and supplied to a television receiver where it can be displayed. They are particularly useful as neuroprotective agents, of special interest in the treatment and prophylaxis of cerebral damage produced by traumatic or ischemic stroke.