Electromagnetic Analysis and Design in Magnetic Resonance Imaging

ISBN-13: 9780849396939 / Angielski / Twarda / 1998 / 282 str.

Jian-Ming Jin; Jianming Jin

Opis

This book presents a comprehensive treatment of electromagnetic analysis and design of three critical devices for an MRI system - the magnet, gradient coils, and radiofrequency (RF) coils. Electromagnetic Analysis and Design in Magnetic Resonance Imaging is unique in its detailed examination of the analysis and design of the hardware for an MRI system. It takes an engineering perspective to serve the many scientists and engineers in this rapidly expanding field. Chapters present: oan introduction to MRI obasic concepts of electromagnetics, including Helmholtz and Maxwell coils, inductance calculation, and magnetic fields produced by special cylindrical and spherical surface currents oprinciples for the analysis and design of gradient coils, including discrete wires and the target field method oanalysis of RF coils based on the equivalent lumped-circuit model as well as an analysis based on the integral equation formulation osurvey of special purpose RF coils oanalytical and numerical methods for the analysis of electromagnetic fields in biological objects With the continued, active development of MRI instrumentation, Electromagnetic Analysis and Design in Magnetic Resonance Imaging presents an excellent, logically organized text - an indispensable resource for engineers, physicists, and graduate students working in the field of MRI.

Spis treści

INTRODUCTION TO MAGNETIC RESONANCE IMAGINGIntroductionPhysical Principles of Nuclear Magnetic resonanceHardware of Magnetic Resonance ImagingBasic Pulse Sequences and Imaging MethodsBASIC ELECTROMAGNETIC THEORYIntroductionBrief Review of Vector AnalysisMagnetostatic Fields in Free SpaceHelmholtz and Maxwell CoilsBoundary Conditions for Magnetostatic FieldsMagnetostatic Fields in Source-Free RegionsMagnetostatic Fields Produced by Cylindrical and Spherical Surface CurrentsInductance CalculationTime-Varying Electromagnetic FieldsTime-Harmonic FieldsAppendicesANALYSIS AND DESIGN OF GRADIENT COILSIntroductionEffect of Coil 'sInductanceFigure of MeritGradient Coils Made of Discrete WiresMagnetic Field Produced by a Cylindrical Surface Current.Target Field MethodShielded Gradient CoilsMinimization of Inductance and Power DissipationPlanar Gradient CoilsAppendicesANALYSIS AND DESIGN OF RF COILSIntroductionConcepts of Resonance and ReciprocityEquivalent Circuit MethodAnalysis of RF ShieldsField Inhomogeneity of Birdcage CoilMethod of Moments AnalysisMiscellaneous TopicsRF FIELDS IN BIOLOGICAL OBJECTSIntroductionAnalytical AnalysisTwo-Dimensional Numerical AnalysisThree-Dimensional Numerical AnalysisAPPENDIX: ABOUT THE SOFTWARE Each chapter also contains Problems and References

O autorze

Jin, Jianming