History
Both MRI and MRS are based on Nuclear Magnetic Resonance Spectroscopy (NMR), a technique used by chemists and physicists in the analysis and characterization of small molecules in solid, liquid, and gel-like solutions. Theoretically, MRS can be used to detect nuclei such as carbon (13C), nitrogen (15N), fluorine (19F), sodium (23Na), phosphorus (31P) and hydrogen (1H), however only the latter two are present in significant abundance to be detected in humans. Hydrogen is the most commonly detected nucleus due to its high natural abundance, acute sensitivity to magnetic manipulation, well known simple technique, and relatively easily discernible spectra.
Read more about this topic: In Vivo Magnetic Resonance Spectroscopy
Famous quotes containing the word history:
“I am ashamed to see what a shallow village tale our so-called History is. How many times must we say Rome, and Paris, and Constantinople! What does Rome know of rat and lizard? What are Olympiads and Consulates to these neighboring systems of being? Nay, what food or experience or succor have they for the Esquimaux seal-hunter, or the Kanaka in his canoe, for the fisherman, the stevedore, the porter?”
—Ralph Waldo Emerson (1803–1882)
“We said that the history of mankind depicts man; in the same way one can maintain that the history of science is science itself.”
—Johann Wolfgang Von Goethe (1749–1832)
“False history gets made all day, any day,
the truth of the new is never on the news
False history gets written every day
...
the lesbian archaeologist watches herself
sifting her own life out from the shards she’s piecing,
asking the clay all questions but her own.”
—Adrienne Rich (b. 1929)