22 basic principles of mri the basis of mri is the directional magnetic field or moment associated with charged particles in motionnuclei containing an odd number of protons and or neutrons have a characteristic motion or precessionbecause nuclei are charged particles this precession produces a small magnetic moment. Chapter 2 mri principles in this chapter we present the basics of magnetic resonance imaging advanced concepts are covered by haacke et al as well as liang and lauterbur this chapter is structured as follows in section 21 we present the physical principles of magnetic resonancethen in section 22 we show how the signal in mri is observed using receiving antennas and . Mri is known as magnetic resonance imaging or nuclear magnetic resonance imaging it is a commonly used medical imaging technology in recent years in this article the history of this technology the physical principles behind this technology its applications developments and its advantages and disadvantages will be introduced. Physics of mri nuclear spin magnetic resonance imaging mri relies on the properties of spin to obtain images protons neutrons and electrons all spin around a central axis
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