Magnetic resonance spectroscopy measures of the olefinic resonance (≈ 5.3 ppm) enables estimation of fat unsaturation levels. In spinal bone marrow, the olefinic peak is significantly overlapped by that of water (≈ 4.7 ppm). Previously, STEAM with a TE of 100 ms was demonstrated to resolve the olefinic resonance from that of water in spinal bone marrow at 3 T. In this work, we show that an inversion recovery with short-TE STEAM (20 ms) suppresses the water signal, resolving the olefinic resonance and yielding a signal to noise ratio 3.3x larger than that obtained with long-TE STEAM.
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