Abstract
Proton spin longitudinal ( T 1) and transverse ( T 2) relaxation and proton density studies were carried out on human fatty tissue and bovine white matter, both in the native state and after immersion in D 2O. It is concluded that nuclear magnetic resonance signals from fatty tissue result mainly from methyl and methylene protons of hydrocarbons. No contribution from lipid protons could be detected for white matter, although it contains a high percentage of lipids. Imaging experiments, resulting in T 1, T 2, and proton density maps, support the results obtained with spectroscopic relaxation studies.
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