Designed to provide those engaged in modern medical imaging with a coherent perspective of the entire discipline so that one protocol is no longer an isolated or independent mode of imaging from others, to wit: single photon emission computed tomography (SPECT), positron emission tomography (PET) or magnetic resonance imaging (MRI). Introduces biomagnetic imaging as a third new modality. Copyright (C) Muze Inc. 2005. For personal use only. All rights reserved.