NUCLEAR MAGNETIC RESONANCE IMAGING (NMRI)

Abstract

This paper investigates the physics concepts, basic principles, basic procedure, merit and demerit of Nuclear Magnetic Resonance Imaging.  As a widely used medical technique, this type of imaging utilizes the inherent magnetic properties of protons in human cells.  Superconducting magnets are generally enclosed in a large housing unit to scan various parts of the body. Although there are no biological hazards yet associated with this technique, extreme caution must be taken when working with such large magnets.  They produce strong magnetic fields that can pull both small and large metal objects into the machine.  Overall this is an important medical breakthrough that is continually developing to diagnose serious illnesses.

Table of content

Abstract__________________________________________________________________i

Table of content____________________________________________________________ii

1.0  Introduction____________________________________________________________ 1

1.1.definition of NMRI____________________________________________________1

1.2.Brief Background on the study of NMRI___________________________________2

2.0  PHYSICS CONCEPT OF NMRI____________________________________________3

2.1  Nuclear Spin and Magnet_______________________________________________3

2.1.1        The magnet_____________________________________________________3

2.1.2        Coil___________________________________________________________3

2.1.3        Magnetic Field and Field Strength___________________________________4

2.1.4        Spin behavior in a magnetic field ___________________________________4

2.2  Magnetic Resonance by Nuclei__________________________________________5

2.3  Relaxation__________________________________________________________5

2.4  NMRI Spectra _______________________________________________________6

3.0  BASIC PRINCIPLE OF NMRI ____________________________________________8

3.1  BASIC PROCEDURE OF NMRI__________________________________________12

3.2  Health and safety _______________________________________________________13

3.3  Merit and Demerit of NMRI_______________________________________________13

4.0  conclusion ____________________________________________________________14

References _______________________________________________________________15