22 30 17 9 297 document 17 article.pdf application/pdf 527467 2010-04-02 00:05:27 http://eprints.drcmr.dk/22/1/article.pdf 22 1 application/pdf Published in "Concepts in Magnetic Resonance Part A", September 2008. en public

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accepted http://eprints.org/relation/hasVolatileVersion /id/document/61 http://eprints.org/relation/haspreviewThumbnailVersion /id/document/61 http://eprints.org/relation/hasVersion /id/document/61 http://eprints.org/relation/hasVolatileVersion /id/document/109 http://eprints.org/relation/hasVersion /id/document/109 http://eprints.org/relation/hasIndexCodesVersion /id/document/109 18 4 301 document 18 MagSpherical2crop.jpg image/jpeg 446902 2010-04-02 00:05:29 http://eprints.drcmr.dk/22/2/MagSpherical2crop.jpg 22 2 image/jpeg Graph appearing in figure 2. Illustrates thermal equilibrium in absence of magnetic field. en public

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supplemental http://eprints.org/relation/hasVolatileVersion /id/document/71 http://eprints.org/relation/hassmallThumbnailVersion /id/document/71 http://eprints.org/relation/hasVersion /id/document/71 http://eprints.org/relation/hasVolatileVersion /id/document/72 http://eprints.org/relation/hasVersion /id/document/72 http://eprints.org/relation/hasmediumThumbnailVersion /id/document/72 http://eprints.org/relation/hasVolatileVersion /id/document/73 http://eprints.org/relation/haspreviewThumbnailVersion /id/document/73 http://eprints.org/relation/hasVersion /id/document/73 archive 1 disk0/00/00/00/22 2008-07-20 14:56:11 2010-04-02 00:05:34 2008-07-20 14:56:11 article show larsh@drcmr.dk 0 Hanson Lars G. larsh@drcmr.dk pub I02x903x302 E01x370x350x500 J01x897x280x500x480 H01x671x579x631 drcmr public magnetic resonance imaging, education, quantum mechanics, classical mechanics, tutorial, spin, myths Additional material and animations can be found at http://www.drcmr.dk/MR Educational material introducing magnetic resonance typically contains sections on the underlying principles. Unfortunately the explanations given are often unnecessarily complicated or even wrong. Magnetic resonance is often presented as a phenomenon that necessitates a quantum mechanical explanation whereas it really is a classical effect, i.e. a consequence of the common sense expressed in classical mechanics. This insight is not new, but there have been few attempts to challenge common misleading explanations, so authors and educators are inadvertently keeping myths alive. As a result, new students' first encounters with magnetic resonance are often obscured by explanations that make the subject difficult to understand. Typical problems are addressed and alternative intuitive explanations are provided. 2008-09-03 published Concepts in Magnetic Resonance Part A 32A 5 Wiley InterScience 329-340 10.1002/cmr.a.20123 TRUE 1546-6086 http://www3.interscience.wiley.com/journal/121394126/abstract http://www.drcmr.dk/MR author http://www.drcmr.dk/bloch author 1. Bell JS. 1987. Speakable and unspeakable in quantum mechanics. Cambridge, England: Cambridge University Press. 2. Levitt MH. 2008. Spin Dynamics: Basics of Nuclear Magnetic Resonance, 2nd ed. Chichester, England: John Wiley and Sons. 3. Higgins DM. 2003. ReviseMRI web site, 2003. http://www.ReviseMRI.com/. Retrieved: 2008. 4. Bushong SC. 2003. Magnetic Resonance Imaging. Missouri, USA: Mosby Inc. 5. Rinck PA. 2003. Magnetic Resonance in Medicine, 5th ed. Berlin, Germany: ABW Wissenschaftsverlag GmbH. 6. Westbrook C, Roth CK, Talbot J. 2005. MRI in practice, 3rd ed. Oxford, England: Blackwell Publishing Ltd. 7. Gadian DG. 1982. Nuclear Magnetic Resonance and its applications to living systems. New York, USA: Oxford University Press. 8. Hornak JP. 1996. The basics of MRI. Web book, http://www.cis.rit.edu/htbooks/mri/. Retrieved: 2008. 9. Hoa D, Micheau A, Gahide G. 2006. Creating an interactive web-based e-learning course: A practical introduction for radiologists. Radiographics 26(6):e25; quiz e25. http://www.e-mri.com/. Retrieved: 2008. 10. Farrar TC, Becker ED. 1971. Pulse and Fourier Transform NMR. New York, USA: Academic Press Inc. 11. Gerlach F, Stern O. 1922. Der experimentelle Nachweis der Richtungsquantelung im Magnetfeld. Zeitschrift fur Physik 9:349–352. 12. Rabi II, Ramsey NF, Schwinger J. 1954. Use of rotating coordinates in magnetic resonance problems. Rev Mod Phys 26(2):167–171. 13. Hargreaves B. 2005. MRI movies. http://www-mrsrl.stanford.edu/Ì brian/mri-movies/. Retrieved: 2008. 14. Hanson LG. 2007. Graphical simulator for teaching basic and advanced MR imaging techniques. RadioGraphics ; http://radiographics.rsnajnls.org/cgi/content/abstract/e27. Software: http://www.drcmr.dk/bloch. Retrieved: 2008. 15. Feynman RP, Vernon Jr FL, Hellwarth RW. 1957. Geometrical representation of the Schr¨odinger equation for solving MASER problems. Journal of Applied Physics 28(1):49–52. 16. Rabi II. 1937. Space quantization in a gyrating magnetic field. Phys Rev 51(8):652, 654. 17. Schild HH. 1990. MRI made easy. Berlin, Germany: Schering AG. 18. Callaghan PT. 1983. Principles of Nuclear Magnetic Resonance Microscopy. Oxford: Clarendon Press. 19. Bransden BH, Joachain CJ. 1989. Introduction to quantum mechanics. Harlow, England: Longman Scientific and Technical. 20. Landau LD, Lifshitz E. 1980. Course of Theoretical Physics: Statistical Physics, 3. ed., part 1. Oxford, England: Pergamon Press.