10-05-2012, 01:05 PM
MAGNETIC RESONANCE IMAGING
PPT OF MRI.pptx (Size: 648.28 KB / Downloads: 44)
INTRODUCTION
Magnetic resonance imaging (MRI)
medical imaging technique used in radiology to visualize detailed internal structures.
MRI makes use of the property of nuclear magnetic resonance (NMR) to image nuclei of atoms inside the body.
GENERAL WORKING OF MRI
Put subject in big magnetic field
Transmit radio waves into subject [2~10 ms]
Turn off radio wave transmitter
Receive radio waves re-transmitted by subject0
Convert measured RF data to image
Hydrogen atoms are best for MRI
Biological tissues are predominantly 12C, 16O, 1H, and 14N
Hydrogen atom is the only major species that is MR sensitive
Hydrogen is the most abundant atom in the body
The majority of hydrogen is in water (H2O)
Essentially all MRI is hydrogen (proton) imaging
PPT OF MRI.pptx (Size: 648.28 KB / Downloads: 44)
INTRODUCTION
Magnetic resonance imaging (MRI)
medical imaging technique used in radiology to visualize detailed internal structures.
MRI makes use of the property of nuclear magnetic resonance (NMR) to image nuclei of atoms inside the body.
GENERAL WORKING OF MRI
Put subject in big magnetic field
Transmit radio waves into subject [2~10 ms]
Turn off radio wave transmitter
Receive radio waves re-transmitted by subject0
Convert measured RF data to image
Hydrogen atoms are best for MRI
Biological tissues are predominantly 12C, 16O, 1H, and 14N
Hydrogen atom is the only major species that is MR sensitive
Hydrogen is the most abundant atom in the body
The majority of hydrogen is in water (H2O)
Essentially all MRI is hydrogen (proton) imaging