magnetic resonance imaging david ramsay
TRANSCRIPT
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Magnetic Resonance Imaging
David Ramsay
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Contents
What Is an MRI? Parts of an MRI How an MRI Works Parts In an MRI Machine Benefits of an MRI
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What Is an MRI?
An MRI is a Magnetic Resonance Image. It is a medical imaging technique used to visualize detailed internal structures and limited functions of the body.
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Parts of an MRI
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How does an MRI Work?
A very powerful electromagnet aligns the hydrogen atoms in the body.
Then radio waves are used to realign the hydrogen atoms in the body into different patterns.
Coils around the parts of the body being imaged send and receive radio waves.
A computer processes the signals that are received and translates them into images that can be manipulated to be studied in different angles.
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Uses of an MRI
Diagnosing injuries to soft tissues Following up on abnormalities
found in other tests such as an ultra sound or a cancer screening
Looking at portions of the brain to diagnose abnormalities
Viewing blood vessels to monitor abnormal constriction and dilation
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Benefits of an MRI
Doesn’t use X-Ray radiation. Excellent image resolution and contrast of
soft tissues and anatomical structures Faster and less labor intensive in comparison
to X-Ray imaging of soft tissues. Doesn’t need contrasting media for taking
images of soft tissues and blood vessels
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References
http://en.wikipedia.org/wiki/Magnetic_resonance_imaging
http://www.radiologyinfo.org/en/info.cfm?pg=bodymr#part_five
http://www.emedicinehealth.com/magnetic_resonance_imaging_mri/article_em.htm
http://www.umm.edu/radiology/mri.htm http://health.ucsd.edu/specialties/mri/ptinfo/apps.htm