Abstract
With the term “spin” we characterize a property of elementary particles such as protons and electrons which can be understood only within the theoretical framework of quantum mechanics. Thus, the NMR phenomenon is quantum mechanical in nature. Nevertheless, NMR can be understood using simple physical models from classical physics. We like to think of a spin as something like a compass needle, which will orient itself along an external magnetic field if it is placed in it. Being governed by the laws of quantum mechanics, spins can align not only parallel, but also antiparallel to an external field. Thus, a system of spins pointing in all spatial directions outside a magnetic field, will end up with some spins aligned parallel and some antiparallel to an external magnetic field, once such a field is applied (Fig. 1.1).
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References
Pake GE (1950) Fundamentals of nuclear magnetic resonance absorption, part 1. Am J Phys 18: 438–452
Schiff LI (1968) Quantum mechanics ( 3rd edition ). McGraw-Hill, New York
Slichter CP (1963) Principles of magnetic resonance. Harper and Row
Carr HY, Purcell EM (1954) Effects of diffusion on free precession in nuclear magnetic resonance experiments. Phys Rev 94: 630–635
The Heisenberg uncertainty principle states that certain pairs of variables, such as the energy or frequency of the quantum mechanical state and the life time of the system in such a state, cannot be known more exactly than given by the relation AEAt h, where h is Planck’s constant
Mansfield P, Morris PG (1982) NMR imaging in biomedicine. Acadamic Press, New York 1982
Solomon I (1955) Relaxation processes in a system of two spins. Phys Rev 99: 559–565
Bloembergen N (1957) Proton relaxation times in paramagnetic solutions. J Chem Phys 27: 572–573
Gadian DG, Payne JA, Bryant DJ, Young IR, Carr DH, Bydder GM (1985) Gadolinium-DTPA as a contrast agent in MR imaging - theoretical projections and practical observations. J Comp Ass Tomogr 9: 242–251
Bertini I, Luchinat C (1986) NMR of paramagnetic molecules in biological systems. Benjamin/Cummings Publishing Co, Menlo Park, Ca
Burton DR, Forsen S, Karlstrom G, Dwek RA, McLaughlin AC, Wain-Hobson S (1976) Difficulties in determining accurate molecular motion parameters from proton relaxation enhancement measurements as illustrated by the immunoglobulin G-Gd(III) system. Eur J Biochem 71: 519–528
Grodd W, Brasch RC (1986) Magnetopharmazeutische Kontrastveränderungen in der Kernspintomographie. Fortschr Röntgenstr 145: 130–139
Saini S, Stark DD, Hahn PF, Wittenberg J, Brady TJ, Ferrucci JT (1987) Ferrite particles: a superparamagnetic agent for the reticuloendothelial system. Radiology 162: 211–216
Widder DJ, Greif WL, Widder KJ, Edelman RR, Brady TJ (1987) Magnetite albumin microspheres: a new MR contrast material. Am J Roentgenol 148: 399–404
Bean CP, Livingston JD (1968) Superparamagnetism. J Appl Physiol 30: 1205–1298
Duewell S, Wüthrich R, Buck A, von Schulthess GK (1988) Signal loss in intravoxel incoherent motion: evaluation of different perfusion types and pulse sequences. SHRM book of abstracts 221
Beall PT, Amtey SR, Katsturi SR (1984) NMR data handbook for biochemical applications. Pergamon Press, New York
Hahn EL (1950) Spin echoes. Phys Rev 80: 580–585
Meiboom S, Gill D (1959) Modified spin echo methods for measuring nuclear relaxation times. Rev Sei Instr 29: 688–692
Stejskal EE, Tanner JE (1965) Spin diffusion measurements: spin echoes in the presence of a time-dependent field gradient. Chem Phys 42: 288–293
von Schulthess GK, Higgins CB (1985) Blood flow imaging with MR: spin-phase phenomena. Radiology 157: 687–695
Waluch V, Bradley WG (1984) NMR even echo rephrasing in slow laminar flow. J Comput Ass Tomogr 8: 594–598
Pattany PM, Phillips JC, Chiu LC, et al (1987) Motion artifact suppression technique ( MAST) for MR imaging. J Comput Ass Tomogr 11: 369–377
Singer JR (1978) NMR diffusion and flow measurements and an introduction to spin phase graphing. J Phys E Sei Instrum 11: 281–291
Dixon WT (1984) Simple proton spectroscopic imaging. Radiology 153: 189–194
Brateman L (1986) Chemical shift imaging: a review. AJR 146: 971–980
Haase A, Mattaei D, Hänicke W, Merboldt KD (1986) Flash imaging: rapid NMR imaging using low flip-angle pulses. J Magnetic Resonance 67: 258–266
van der Meulen P, Groen JP, Cuppen JJ (1985) Very fast MR imaging by field echoes and small-angle excitation. Mag Res Imag 3: 297–299
Young IR, Khenia S, Thomas DGT et al (1987) Clinical magnetic susceptibility mapping of the brain. J Comput Ass Tomogr 11: 2–6
Nayler GL, Firmin DN, Longmore DB (1986) Blood flow imaging by cine magnetic resonance. J Comput Ass Tomogr 10: 715–722
Wehrli FW, Shimakawa A, Gullberg GT, MacFall JR (1986) Time-off-flight MR flow imaging: selective saturation recovery with gradient refocussing. Radiology 160: 781–785
Lauterbur PC (1973) Image formation by induced local interactions: examples employing NMR. Nature 242: 190–196
Kumar A, Welti D, Ernst RR (1975) NMR Fourier zeugmatography. J Mag Resonance 18: 63 - 89
Edelstein WA, Hutchinson JMS, Johnson G et al (1980) Spin warp NMR imaging and applications to human whole-body imaging. Phys Med Biol 25: 751–756
Hounsfield GN (1973) Computerised transverse axial scanning (tomography). 1. Description of system. Br J Radiol 46: 1016–1022
Gordon R, Herman GT, Johnson SA (1975) Image reconstruction from projections. Scientific American 233: 56–68
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von Schulthess, G.K. (1989). The Physical Basis of Magnetic Resonance Imaging. In: Morphology and Function in MRI. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-73516-5_2
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DOI: https://doi.org/10.1007/978-3-642-73516-5_2
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