Introduction to magnetic resonance imaging
The uniqueness of MR images lies in the physical origin of the signal. In X-rays, the radiation (X) is “absorbed” more by bones and less by soft tissues. Consequently, in X-rays (negative), bones appear as the bright part of the image, whereas soft tissues are darker. The same applies to ultrasonography. Ultrasounds cross the tissues and are absorbed by them in differing degrees. The resulting image reflects the different level of ultrasound absorption by the tissues. In both cases, the image results from the interaction between the X radiation or ultrasounds and the electronic structure of matter.
KeywordsMagnetic Field Static Magnetic Field Proton Density Larmor Frequency Nuclear Magnetic Resonance Imaging
Unable to display preview. Download preview PDF.
- 1.Abragam A (1970) The principles of nuclear magnetism. Oxford University Press, OxfordGoogle Scholar
- 2.Mansfield P, Morris PG (1982) NMR imaging in biomedicine. Adv Magn Reson [Suppl 2]Google Scholar
- 3.Partein CL, James AG et al. (1984) Nuclear magnetic resonance (NMR) imaging. W. B. Saunders Co, PhiladelphiaGoogle Scholar
- 4.Kressel HY (1985) Magnetic resonance annual 1985. Raven Press, New YorkGoogle Scholar
- 5.Morris PG (1986) Nuclear magnetic resonance imaging in medicine and biology. Oxford Sciences Publication, OxfordGoogle Scholar
- 6.Foster MA, Hutchinson JMS (1987) Practical NMR imaging; IRL Press, OxfordGoogle Scholar
- 7.Higgins GB, Hricak H (1987) Magnetic resonance imaging of the body. Raven Press, New YorkGoogle Scholar
- 8.Brant-Zawadzki M, Norman D (1987) Magnetic resonance imaging of the central nervous system. Raven Press, New YorkGoogle Scholar
- 9.Stuart Young W (1988) Magnetic resonance imaging, basic principles. Raven Press, New YorkGoogle Scholar
- 10.Kressel HY (1988) Magnetic resonance annual 1988. Raven Press, New YorkGoogle Scholar
- 11.Runge VM (1989) Enhanced magnetic resonance imaging. C. V. Mosby Co, St. LouisGoogle Scholar
- 12.Pomeranz SJ (1989) Craniospinal magnetic resonance imaging. W. B. Saunders Co, PhiladelphiaGoogle Scholar