Acquisition and quantitation in proton spectroscopy

Abstract

Localized proton NMR spectroscopy in the human brain is one of the more technically advanced applications of human in vivo NMR spectroscopy. Spin/echo techniques introduced reliable localization procedures, whereas the introduction of phase encoding techniques improved the spatial information content considerably. Using the sensitivity of the ¹H NMR signal, a spatial resolution of 7 × 7 × 15 mm can be obtained. Chemical shift images can be reconstructed to represent the choline, creatine, N‐acetyl aspartate and lactate distribution in the human brain. These low resolution images may be used as a new functional imaging modality to visualize and derive quantitative biochemical information from focal brain lesions under normal and pathological conditions.