rotons (hydrogen nuclei) display magnetic properties when in a strong magnetic field, and are the source of the signal in both methods. All protons in a water molecule have the same magnetic properties and are the main source of the signal in MRI.
rotons in different molecules have slightly different magnetic properties, and this difference enables small molecules in the body to be detected by MR spectroscopy. An MR spectrum will thus reveal the molecules within tissues, provided that the molecules are mobile and present in measurable quantities (> 1 mmol/l) (1). Molecules can be
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