MRI Scanning

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  • MRI Scanning
    • magnetic resonance imaging
    • patient put through a cylinder with an electro-magnet
    • causes a magnetic field in the body that aligns all H atoms
    • radio wave pulses knock them back out causing detectable radio signals
    • strength of returned signal determines what tissue type it came from
    • those containing lots of H atoms are white
    • those containing few H atoms are dark
    • 3D image
    • greater contrast to abnormal cells
    • no harmful radiation
    • expensive equipment
    • some people worry about the process


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