Magnetic resonance imaging for the diagnosis of tumors of the head and neck is characterized by high sensitivity but sometimes low specificity. Therefore great expectations have been raised by the development of high-resolution in vivo magnetic resonance spectroscopy (MRS). While MRI is based on the proton density and the relaxation times of the tissue under investigation, MRS allows determination of the molecular linkage of several atoms . The purpose of spectroscopy is to evaluate the frequency of the different molecular bonds containing a given atom in the region of interest. In vivo spectroscopy investigations have established typical spectra for different types of normal or pathologic tissues.
KeywordsLymphoma Tuberculosis Sarcoma Choline Fluorine
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