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MRI Magnetic Resonance Imaging

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phyre
19 diapositives · 585 Views · Oct 13, 2014

MRI Magnetic Resonance Imaging. By: Darshan Thakkar. Defining an MRI. M edical imaging technique used in radiology to visualize detailed internal structures. What does an MRI look like?. Who Discovered MRI’s?.

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MRI Magnetic Resonance Imaging
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  1. MRIMagnetic Resonance Imaging By: Darshan Thakkar

  2. Defining an MRI • Medical imaging technique used in radiology to visualize detailed internal structures.

  3. What does an MRI look like?

  4. Who Discovered MRI’s? • Raymond VahanDamadian is an American-Armenian practitioner and inventor of the first MR (Magnetic Resonance) Scanning Machine which is one of the most useful diagnostic tools of our time.

  5. How did they Discover it? • In a 1971 paper in the journal Science, professor Damadian reported that tumors and normal tissue can be distinguished in vivo by nuclear magnetic resonance. He suggested that these differences could be used to diagnose cancer, though later research would find that these differences, while real, are too variable for diagnostic purposes. This journal helped begin the studies done for inventing MRI’s.

  6. How does an MRI scanner work? • It uses a powerful magnetic field to align some atoms in the body, then uses radio frequency fields to systematically alter the alignment of this magnetization. This causes the nuclei to produce a rotating magnetic field detectable by the scanner—and this information is recorded to construct an image of the scanned area of the body.

  7. Where is it used, or available? • MRI scanners are found in most major hospitals • Many neurologists have these scanners in their offices • The scanner can be costly so it is somewhat hard to find in every practice

  8. Why is an MRI ordered? • MRI’s are used to detect certain illnesses such as MS in the spine • The early detection of MS can help diagnose this disease early and help prescribe the patient the correct medicine. • MRI’s can be used on the head to detect problems with migraines as well • Propanalol may be prescribed

  9. The Usage • All metallic objects on the body are removed prior to obtaining an MRI scan. Occasionally, patients will be given a sedative medication to decrease anxietyand relax the patient during the MRI scan. MRI scanning requires that the patient lie still for best accuracy. Patients lie within a closed environment inside the magnetic machine. Relaxation is important during the procedure and patients are asked to breathe normally. There are loud, repetitive clicking noises which occur during the test as the scanning proceeds. The MRI scanning time depends on the exact area of the body studied, but ranges from half an hour to an hour and a half.

  10. Complications • You have to lay still for an extended period of time • If you have tattoos with metal in them it can cause severe pain

  11. 3 Questions • What does MRI stand for? • Who discovered the MRI? • Name one disease or illness an MRI can help detect.

  12. Answers • Magnetic Resonance Imaging • Raymond VahanDamadian • MS or Migraines

  13. Sites • http://www.medicinenet.com/mri_scan/page2.htm • http://www.netdoctor.co.uk/health_advice/examinations/mriscan.htm • http://en.wikipedia.org/wiki/Magnetic_resonance_imaging

  14. Darshan Thakkar • 3rd Period Honors Health Occupations 3-4 • November 28 2010