Lec12 - magnets point in is randomly distributed. Spinning...

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MRI is ideal for diagnosing multiple sclerosis, tumors, brain infections, torn ligaments, shoulder injuries, bone tumors, cysts or even strokes in their earliest stages.
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MRI machines use radio waves and magnets to provide an unparalleled view inside the human body. See what it is like to get a head scan on the next page
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The MRI system goes through the patient's body point by point, building up a 2-D or 3-D map of tissue types to create images.
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Spinning Protons Act Like Little Magnets Water is the biggest source of protons in the body, followed by fat (how closely followed depends upon what shape you're in.) Normally, the direction that these tiny
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Unformatted text preview: magnets point in is randomly distributed. Spinning protons are little magnets which are frequently referred to as just spins. They Align With An External Magnetic Field (B) Just as a compass aligns with the earth's magnetic field, a spinning proton placed near (or within) a large external magnetic field (called B) will align with the external field. Unfortunately, it is not quite so simple. At the atomic level, some of the protons align with the field and some actually align against the field cancelling each other out. A slight excess will align with the field so that the net result is an alignment with the external field. ....
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Lec12 - magnets point in is randomly distributed. Spinning...

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