Magnetic
Resonance Imaging (MRI) uses a property of hydrogen atoms to visualise
soft tissues in the body. The nucleus of hydrogen spins like a wobbling
spinning top. In a strong magnetic field, the 'wobbles' line up. If
a brief radio signal is sent through the body, the atoms get knocked
out of alignment. As the atoms flip back, they emit radio waves which
are detected and analysed by computer. Different signal strengths represent
different tissues, depending on how much hydrogen is in them as water
or fats. The signals are combined to form a 'slice' image through the
body, and many slices may be combined to give a 3D view.
See more techniques:
Aerial Photography
Computed Tomography (CT Scans)
Endoscopy
High Speed Photography
Kirlian Photography
Light Microscopy (LM)
Magnetic Resonance Imaging (MRI)
Molecular Models
Radionuclide Scanning (Gamma Scanning)
Satellite Images
Scanning Electron Microscopy (SEM)
Scanning Tunnelling Microscopy (STM)
Schlieren Photography
Space Photography (NASA)
Thermography
Transmission Electron Microscopy (TEM)
Ultrasound Images
Ultraviolet Photography
X-Rays
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