1. MRI Magnetic resonance imaging

2. Definition NMR = Nuclear Magnetic Resonance MRI = Magnetic Resonance Imaging ESR = Electron Spin Resonance

3. Similarity Basic principles while in the magnetic field, radio waves redirect the axes of spinning nuclei or electrons

4. Continue Similarity Electron magnetic radiation is used to flip the alignment of nuclear or electron spin from low energy spin aligned state to high energy spin opposed state Radio frequency is absorbed, that is what is measured

5. Difference MRI: spin of nuclei of an odd mass or odd atomic number (usually H) ESR: spin of electrons of most fundamental particles ESR: particles will do as many as possible to pair up electrons MRI: nuclei also do, but not that many

6. Applications MRI is used for body examination. MRI can help in visualizing the human body. It can form structure images of tissues and bones in high definition. Also, they can detect problems such as tumors and gores.

7. Basic MRI scans T2 Weighting T2* Weighting FLAIR T1 Weighting with gadolinium contrast T1,T2 are the time constant values. they determine the physical property changes of a specific tissue when it receives a series of radial pulse from the machine. Different type of tissue may have different T1, T2 values. This is due to the difference in behaviors of the H’s protons in a particular tissue when a radial pulse is transmitted to it by the magnetic field. Images that contains both the T1,T2 properties can be formed by adjusting TR,TE variables.

8. Uses in medical field Backbone Head Knee and muscles Heart Liver Liver CancerKidney

10. Side Effect of MRI MRI Side-effects are mostly temporary effects. The MRI scan itself does not usually have any physical side-effects. Projectile or missile effect Peripheral nerve stimulation (PNS) Radio frequency energy Acoustic noise Contrast agents

11. Politics Issue Our government is investing money on MRI technology to solve following problems 1.Wait List 2.Side Effect 3.Cost

13. Work cites http://www.magnet.fsu.edu/usershub/scientificdivisions/emr/overview.html http://www.chem.ucalgary.ca/courses/351/Carey/Ch13/ch13-nmr-1.html http://www.radiologyinfo.org/en/info.cfm?pg=bodymr#part_five http://www.chinamedi.cn/bbs/dispbbs.asp?boardID=17&ID=160&page=5 http://answers.yahoo.com/question/index?qid=20060902235859AAjZ7gx Simon, Merrill; Mattson, James S (1996). The pioneers of NMR and magnetic resonance in medicine: the story of MRI. Ramat Gan, Israel: Bar-Ilan University Press. ISBN 0-9619243-1-4.ISBN 0-9619243-1-4 Haacke, E Mark; Brown, Robert F; Thompson, Michael; Venkatesan, Ramesh (1999). Magnetic resonance imaging: physical principles and sequence design. New York: J. Wiley & Sons. ISBN 0-471-35128-8.ISBN 0-471-35128-8 END