MR Principles and Technology

This chapter provides a review of basic magnetic resonance imaging (MRI) principles with emphasis on the interactions with moving blood. An effort is made to help familiarize the reader with concepts and terminology unique to MRI. A glossary of conventional terms used in nuclear magnetic resonance has been prepared by the American College of Radiology and is recommended to the reader for standard definitions and conventions [1]. We approach this subject by first discussing the phenomenon of nuclear magnetic resonance. The topics that follow include relaxation parameters, Fourier transformation, spatial localization, the effects of imaging parameters on contrast, MR signal dependence on flow, MR angiographic techniques, instrumentation, quantitative image characteristics, and pulse sequences. The reader interested in a more thorough discussion of any of these subjects can refer to the texts referenced in the respective sections and listed at the end of the chapter.

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